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ASME B94.1 IM-1993 (REVISION OF ANSI B94.11-1979)

Twist Drills

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AN AMERICAN NATIONAL STANDARD

The American Societyof Mechanical Engineers

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ASME B 9 4 . 1 1 N 9 3 W 0759670 0540651 071

m

AN AMERICAN NATIONAL STANDARD

1

L

Twist Drills

ASME B94.11M-1993 (REVISION OF ANSI B94.11-1979)

1

1

The American Society of Mechanical Engineers I

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A S I E B94-LI1 93

m

0759670 0540652 T O B

m

O

Date of Issuance: March 31, 1994

This Standard will be revisedwhen the Society approves the issuance of a new edition. There will be no addenda or written interpretations of the requirements of this Standard issued to this Edition.

ASME is the registered trademark of The American Society of Mechanical Engineers.

This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Consensus Committee that approved the codeor standard was balanced to assure that individuals from competent and concerned interestshave had anopportunity to participate. The proposed code or standard was made available for public review and comment which provides an opportunity for additionalpublic input from industry, academia, regulatory agencies, and the public-at-large. ASME does not "approve," "rate," or "endorse" any item, construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume any such liability.Users of a codeor standard are expresslyadvised that determinationof the validity of any such patentrights, and the risk of infringement of such rights, is entirely their own responsibility. Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard. ASME accepts responsibility for only those interpretationsissued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual volunteers.

No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.

Copyright O 1994 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A. --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

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ASME B 9 4 . 1 1 M 93 W O759670 0540b53 944

m

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FOREWORD (This Foreword is not a part of ASME 894.1 1"1993.)

The U.S.A. Standard Twist Drills-Straight Shank (USAS1 B5-12-1940) Standardized Drill Nomenclature and Major Dimensions, Technical Committee No. 7 on Twist Drills was established in 1946 and a revision dated March 22, 1950 was issued. The committee was reactivated in 1956 and a revision dated December 15, 1958 was issued. The committee was again reactivated in 1964 and a redesignated USAS B94.11-1967 was issued on May 4, 1967. The above standard was reaffirmed in 1972 as ANSI B94.11-1967 (R1972). Technical Committee No. 7 was again reactivated in March 1978 for the purpose of reviewing ANSI B94.11-1967 (R1972)and considered a proposed Inch and Metric Standard submitted by the Metal Cutting Tool Institute and industry that reflects current U.S. drill usage. The proposal added metric sizes in jobbers series, screw machine series,taper length series, and taper shank series that were reflective of current industry practices and usage patterns. Metric sizes were not included for core drills, and combined drills and countersinks, In addition the entire standard was dual-dimensionedbecause of themetric additions. The suggestions werereviewed and a draft was approved by the Technical Committee on November 15, 1978 for submission to sectional committeeB94 and sponsor organizations of ANSI. The revision was approved by the American National Standards Institute on August 29, 1979 and redesignated ANSI B94.11M-1979. Following the resignation and retirementof all but oneof the membersof the Technical Committee No. 7, new members were recruited so that revisions suggested by members of the United States Cutting Tool Institute could beconsidered. A draft of the results of the committee's deliberations was approved by the commitee on February 28, 1991. In addition to dealingwith theUSCTI suggestions, the committeealsocorrectedmany numerical and editorial errors. Other changes, designed to make this document easier to use, were also recommended. The recommended revision was approved by the American National Standards Institute on September 29,1993 and was redesignated ASMEB94.11" 1993.

...

111

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ASME STANDARDS COMMITTEE B94 Standardization of Cutting Tools, Holders, Drivers and Bushings (The following is theroster of the Committee at the time of approval of this Standard.)

OFFICERS E. J. Czopor, Chairman E. W. McLaren, Secretary

COMMllTEE PERSONNEL E. J. Czopor, E & S Sales, Inc., Bloomfield Hills, Michigan M . E. Merchant, Metcut Res Associates, Inc., Cincinnati, Ohio C. W. Preuss, Kingsford Broach and Tool, Inc., Westlake, Ohio J. R. Strolberg, Rockton, Illinois A. M. Bratkovich, Alternate, NMTBA, McLean, Virginia

TECHNICAL COMMITTEE 7-TWIST

DRILLS

C. T. Wax, Chairman, Scully-Jones Corp., Chicago, Illinois P. Field, Michigan Drill Co., Miami, Florida R. C. Gulbrandsen, Precision Twist Drill Co., Crystal Lake, Illinois M. N. Jarvis II, Jarvis Cutting Tools, Inc., qochester, New Hampshire D. L. Lewis, Kennametal, Inc., Raleigh, North Carolina R. E. Moring, Greenfield Industries, Augusta, Georgia C. W. Preuss, Kingsford Broach and Tool, Inc., Westlake, Ohio D. E. Sisler, Caterpillar, Inc., Aurora, Illinois

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ASME B 9 4 = 1 1 M 9 3

m 0759670 O540655 717

CONTENTS

Foreword .............................................................................................. Standards Committee Roster .....................................................................

1 2

3

Scope .............................................................................................. Twist Drills 2.1 NomenclatureandDefinitions ....................................................... 2.2 Classifications ............................................................................ CombinedDrillsandCountersinks 3.1 NomenclatureandDefinitions ....................................................... 3.2 Applicable Twist DrillTerms ........................................................

Figures 1 Identity of TwistDrillFeatures ............................................................ 2 Identity of CoreDrillFeatures ............................................................. 3 Identity of CombinedDrillandCountersinkFeatures ............................... 4 Dimensions of Fractional Size Twist Drills . High Speed Steel (Silver and Deming Style) .................................................................

Tables 1 General Dimensions of Straight Shank Twist Drills . Jobbers Length ........ 2 General Dimensions of Straight Shank Twist Drills . Taper Length A . Through '/2 in . (12.7 mm) Dia....................................................... B . Over ' / 2 in . (12.7 mm) Dia ............................................................. 3 General Dimensions of Straight Shank Twist Drills - Screw Machine Length A . Through 1 in . (25.4 mm) Dia......................................................... B . Over 1 in . (25.4 mm) Dia .............................................................. 4 General Dimensions of Tangs for Straight Shank Twist Drills ................... 5 General Dimensions of Taper Shank Twist Drills .................................... 6 Specifications and Definitions for Split Point Drill Grinding ..................... 7 General Dimensions of Three and Four Flute Straight Shank Core Drills .... 8 General Dimensions of Three and Four Flute Taper Shank Core Drills ....... 9 A . General Dimensions of Combined Drills and Countersinks (Plain and Bell Types) .................................................................... B . Tolerances of Combined Drills and Countersinks ............................... 10 Element Tolerances for High Speed Steel General Purpose Twist Drills ..................................................................................

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...

111

V

1

1 3 3 6

2 4 5 49

7

16 21 25 33 34 35 48 50 52 54 55 56

ASME B74.LLM

73

m 0757670 0540656

653

m

ASME 894.1 1 M-1993

TWIST DRILLS (Straight Shank and Taper Shank Combined Drills and Countersinks)

1 SCOPE

helix angle - the angle made by the leading edge of the land with a plane containing the axis of the drill

ThisStandard coversnomenclature,definitions, sizes and tolerances of High Speed Steel, Straightand Taper Shank Drills, and CombinedDrills and Countersinks, Plain and Bell Type. Itcovers both inch and metric size drills.

land - the peripheral portion of the drill body tween adjacent flutes

land width - the distance between the leading edge and the heel of the land measured at a right angle to the leading edge

2 TWIST DRILLS

lips ( a ) two-flute drill - the cutting edges extending from the chisel edge to the periphery ( 6 ) three- or four-flute drill (core drill) - the cutting edges extending from the bottom of the chamfer to the periphery

2.1 NomenclatureandDefinitions

axis - the imaginary straight line which forms the longitudinal center line of the drill back taper- a slight decrease in diameter from point to back in the body of the drill

lip relief - the axial relief on the drill point

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body - the portion of the drill extending from the shank or neck to the outer corners of the cutting lips

lip relief angle - the axial relief angle at the outer corner of the lip. It is measured across the margin portion of the land.

body diameter clearance - that portion of theland that has been cut away so it will not rub againt the walls of the hole

margin - the cylindrical portion of the land which is not cut away to provide clearance

chisel edge - the edge at the end of the web that connects the cutting lips

neck - the section of reduced diameter between the body and the shank of a drill

chisel edge angle - the angle included between the chisel edge and the cuttinglip as viewed from the end of the drill

overall length - the length from the extreme end of the shank to the outer corners of the cutting lips. It does not include the conical shank end often used on straight shank drills, nor does it include the conical cutting point used on both straight and taper shank drills. (For core drills with an external center on the cutting end, same as for two flute drills. For core drills with internal centers on the cutting end, the overall length is to the extreme ends of the tool.)

clearance diameter - the diameter over the cut-away portion of the drill lands drill diameter - the diameterover the marginsof the drill measured at the point flutes - helical or straight grooves cut or formed in the body of the drill to provide cutting lips,to permit removal of chips, and to allow cutting fluid to reach the cutting lips

point - the cutting end of a drill, made up of the ends of the lands, the web, and the lips. In form, it resembles a cone, but departs from a true cone to furnish clearance behind the cutting lips.

flute length - the length from the outer corners of the cutting lip to the extreme back end of the flutes. It includes the sweep of the tool used to generate the flutes and, therefore, does not indicate the useable length of the flutes.

point angle - the angle included between the lips projected upon a plane parallel to the drill axis and parallel to the cutting lips 1

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be-

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0

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bb

--Axis-

a

accordance Standard Tapers

Shank

- -

Taper shank -in American National Machine

with B5.10,

-b/

m length

IDENTITY

Overall

Body-+j

length2

angle.

angle

e

OF TWIST DRILL FEATURES

nb/

Helix

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FIG. 1

.4

IL-Flute

r-Neck

Lip relief

a

‘-Lip

Chisel

’

diameter

anale

Web’ Chisel eage-

edge

Body

clearance

Clearance

l

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ASME B 7 4 m L L M 73

m

0757670 0540658 42b

m

TWIST DRILLS

shank - the part of the drill by which it is held and driven

3 COMBINED DRILLS AND COUNTERSINKS

3.1 NomenclatureandDefinitions

tang - the flattened end of a taper shank, intended to fit into a slot in the socket tang drive - two opposite parallel driving flats the extreme end of a straight shank

These definitionsare applicableto Tables 9 and 10.

axis - the imaginary straight line which forms the longitudinalcenter line of the combineddrill and countersink.

on

twist drill - a rotary end cutting tool having one or more cutting lips and having one or more helical or straight flutes for the passage of chips and the admission of a cutting fluid

O

back taper - a slight decrease in diameter from the front to back in the drill length bell angle- the included angleof the secondary conical section providing clearance or protection for the countersink angle conical surface (it is normally 120 deg.1

web - the central portion of the body that joins the lands. The extreme end of the web forms the chisel edge on a two-flute drill.

bell diameter - the diameter at the intersection of the countersink portion and the bell portion at the leading edge of the land

web thickness - the thickness ofthe web at the point unless another specific location is indicated web thinning - the operation of reducing the web thickness at the point to reduce drilling thrust

body - the central portion of the body by which it is held or driven combined drill and countersink - single or doubleend cutting tool, havinghelical or straight flutes, and having a drill portion and an adjacent integral countersink portion, primarilyused to produce centerholes in work that will be held between machine centers

2.2 Classifications

e

2.2.1 Based on Kind of Shank straight shank drills -those having cylindrical shanks which may bethe same or different diameter than the countersink angle - the included angle of the counbody of the drill. The shank may be with or without tersink portion (it is normally 60 deg.) driving flats, tang, grooves or threads.

taper shank drills - those having conicalshanks suitable for direct fitting into tapered holes in machine spindles, driving sleeves, or sockets. Tapered shanks generally have a tang, which is used with a drift bar to eject the drill from its mating socket.

a

countersink relief angle - the angle between a plane at right angles to theaxis of the tool, and a line tangent to the surface of the countersink portion at the intersection of the countersink portion and the body and at theleading edge of the land. For thebell type, the relief angle is measured at the intersection of the bell portion and the body.

2.2.2 Based on Number of Flutes two-flute drills - the conventional typeof drill used for originating holes

countersink portion - that part of the tool which produces a conical bearing surface for the work centers. The bell type produces an additional secondary conical section to provide clearance or protection for the bearing surface.

three-flute drills (coredrills) - drills commonlyused for enlarging and finishing drilled, cast or punched holes. They will not produce original holes. four-flute drills (core drills) - used interchangeably with three-flute drills. They are of similar construction except for the number of flutes.

a

drill diameter - the diameter of the drill portion measured across the outer corners of the cutting lips drill diameter relief - the relief provided on the land of the drill portion to reduce contact with the walls of the hole. It is generally of an eccentric form.

2.2.3 Based on Hand of Cut right-hand cut - when viewed from the cutting point, the counterclockwise rotation of a drill in order to cut

drill length - the length of the drill portion from the outer corners of the cutting to lips its intersectionwith the countersink portion

left-hand cut - when viewed from the cutting point, the clockwise rotation of a drill in order to cut

drillportion - that partof the toolextending beyond 3

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a

ASME B94.11M-1993

t

Shank diameter

4

--Axis-

L

Tang

-

Taper shank-in accordance American National Standard Machine Tapers

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`,,`---

with 85.10,

IDENTITY

point

OF CORE DRILL FEATURES

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FIG. 2

118 deg.

Drill

J

diameter

h

Ma, rgin

Drill

Drill diameter

angle

:‘int

4

b

x-

ang,l;xTrsink

length--U

Point

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Flute

\

-0

angle

FIG. 3

length

Countersink

IDENTITY

Overall

-

Type

Relief

relief

angle

-It-

Lip relief

angle angle

DRILL AND COUNTERSINK

-4”

Countersink * I

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OF COMBINED

Bell

Type

angle

Plain

anale

length-4

Helix

FEATURES

eter

edge

diameter

Chisel

Drill

rotation

DrLnd

Cutting face right-hand

7

R I m

is CT 0

0

I

5 W

ASME B74=11M 73

0757670 0540661 Tl10 H

TWIST DRILLS

ASME B94.11M-1993

overall length-the lengthbetween the extreme points

the countersink portion to produce clearance for the point of a conical center

of the tools

flutes - the helical or straight grooves cut or formed in the cutting portions and the body to provide cutting edges on both the drill and countersink portions, to permit removal of chips and to allow cutting fluidto reach the cutting lips

3.2 Applicable Twist Drill Terms For definitions, see para. 2.1.

chisel edge chisel edge angle hèlix angle lips lip relief lip relief angle point angle web web thickness

flute length - the length from the outer corners of the cutting lips to the extreme ends of the flutes. It includes the sweep of the tool used to generate the flutesand,therefore,doesnotindicatetheusable length of flutes.

land - the peripheral drill and countersink portions between the adjacent flutes

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ASME B S Y = L L M 93

m O759670 O540662 957 m

ASME 894.1 1M-1993

TWIST DRILLS

Chamfer sizes 3/32 in. and larger. sizes under For 3/32 in. a chamfer or conical point may be used at the manufacturer's option.

Table See

10tolerances for

TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS JOBBERS LENGTH - FRACTIONAL, NUMBER, LElTER AND METRIC SIZES

r

Diameter of Drill

D Fraction

No.

Ltr.

Millimeter

T

Decimal Inch Equivalent

Millimeter Equivalent

r

Flute Length F

mm

f

Overall Length

L mm

97 96 95 94 93

0.1 5 0.16 0.1 7 0.1 8 0.1 9

0.0059 0.0063 0.0067 0.0071 0.0075

0.1 50 0.1 60 0.170 O. 180 o. 190

1.6 1.6 1.6 1.6 1.6

19 19 19 19 19

92 91 90 89 88

0.20

0.0079 0.0083 0.0087 0.0091 0.0095

0.201 0.21 1 0.221 0.231 0.241

1.6 2.0 2.0 2.0 2.0

19 19 19 19 19

0.0098 0.01O0 0.01 05 0.01 1 o 0.01 15

0.250 0.254 0.267 0.280 0.292

2.0 2.0 2.4 2.4 2.4

19 19 19 19 19

0.0118 0.01 20 0.01 25 0.01 26 0.01 30

0.300 0.305 0.31 8 0.320 0.330

2.4 2.4 2.4 2.4 2.4

19 19 19 19 19

0.0135 0.01 38 0.01 45 0.01 50 0.01 56

0.343 0.350 0.368 0.380 0.396

3 3 3 5 5

19 19 19 19 19

0.01 57 0.0160 0.01 65 0.01 77 0.0180

0.400 0.406 0.420 0.450 0.457

5 5 5 5 5

19 22 22 22 22

0.22

0.25 87 86 85 84

0.28

0.30 83 82 0.32 81 80 0.35 79 0.38 '/M

0.40 78 0.42 0.45 77 -

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ASME B94.LLM

93

m

0759670 0540663 893 M

ASME 894.1 1M-I 993

TWIST DRILLS

TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS JOBBERS LENGTH FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D)

-

T

Diameter of Drill

T

D Fraction

No.

-

Ltr.

-

Millimeter

0.48 0.50 76 75 0.55 74 0.60 73 72 0.65 71 0.70 70

69 0.75 68 0.80 67 66 0.85 65 0.90 64 63 0.95 62 61 1.o0 60 59

0.01 89 0.01 97 0.0200 0.021o 0.0217

0.480 0.500 0.508 0.533 0.550

5 5 5 6 6

22 22 22 25 25

0.0225 0.0236 0.0240 0.0250 0.0256

0.572 0.600 0.61O 0.635 0.650

6 8 8 8 10

25 29 29 29 32

0.0260 0.0276 0.0280 0.0292 0.0295

0.660 0.700 0.71 1 0.742 0.750

10 10 10 13 13

32 32 32 35 35

0.031 O 0.031 2 0.031 5 0.0320 0.0330

0.787 0.792 0.800 0.813 0.838

13 13 13 13 13

35 35 35 35 35

0.0335 0.0350 0.0354 0.0360 0.0370

0.850 0.889 0.899 0.91 4 0.940

16 16 16 16 16

38 38 38 38 38

0.0374 0.0380 0.0390 0.0394 0.0400

0.950 0.965 0.991 1.o00 1.O16

16 16 17 17 17

38 38 41 41 41

0.041O 0.0413 0.0420

17 17 17 19 19

41 41 41

19 19 19 22 22

1.10

0.0433

1.15

0.0453 0.0465 0.0469 0.0472 0.0492

1.150 1.181 1.191 1.200 1.250

58 57

0.0430

56 1.20 1.25

Overall Length

Millimeter Equivalent

1.O41 1.O50 1.O67 1.O92 1.100

1.O5

t

Flute Length

Decimal Inch Equivalent

F

mm

-L

8 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

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mm

44 44

44 44

44 48 48

ASME 894.11 M-1993

TWIST DRILLS

-

TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS JOBBERS LENGTH - FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D)

r

Diameter of Drill

r

D

Fraction

No. -

Ltr. -

Millimeter

1.30 55 1.35 54 1.40 1.45 1.50 53 1.55

1.60 52 1.65 1.70 51 1.75 50 1.80 1.85 49 1 .so

48 1.95 47 2.00 2.05 46 45 2.10 2.15

44 2.20 2.25 43

2.30 2.35 42 2.40

t

Flute Length

F

Millimeter Equivalent

0.0512 0.0520 0.0531 0.0550 0.0551

1.300 1.321 1.350 1.397 1.400

22 22 22 22 22

1 'I8 1 al' 1 'la 1 al' 1 'I0

48 48 48 48 48

0.0571 0.0591 0.0595 0.061O 0.0625

I .450 1.500 1.511 1.550 1.588

22 22 22 22 22

1 al' 1 'I8 1 al' 1/ 'a 1 'la

48 48 48 48 48

0.0630 0.0635 0.0650 0.0669 0.0670

1.600 1.613 1.650 1.700 1.702

22 22 25 25 25

1 al'

I 71~ 2 2 2

48 48 51 51 51

0.0689 0.0700 0.0709 0.0728 0.0730

1.750 1.778 1.800 1.850 1.854

25 25 25 25 25

2 2 2 2 2

51 51 51 51 51

0.0748 0.0760 0.0768 0.0781 0.0785

1.900 1.930 1 .S50 1384 1.994

25 25 25 25 25

2 2 2 2 2

51 51 51 51 51

0.0787 0.0807 0.081O 0.0820 0.0827

2.000 2.050 2.057 2.083 2.1 O0

25 29 29 29 29

2

2'10 2'la

51 54 54 54 54

0.0846 0.0860 0.0866 0.0886 0.0890

2.1 50 2.184 2.200 2.250 2.261

29 29 32 32 32

2'L 2'la 2'h 2'14 2'14

54 54 57 57 57

0.0906 0.0925 0.0935 0.0938 0.0945

2.300 2.350 2.375 2.383 2.400

32 32 32 32 35

F mm

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Overall Length

Decimal Inch Equivalent

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-L mm Inch -

2'1s 2'18

2'1s 2'h 2'14 2'14 231~ -

57 57 57 57 60

ASME B 9 4 * L L M 93

m

0759b70 0 5 4 0 b b 5 bbb

ASME 894.11 M-I993

TWIST DRILLS

O -

TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS JOBBERS LENGTH - FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D) T

Diameter of Dr

D

_____

Fraction

No.

Ltr.

Millimeter

41

2.46 40 2.50 39 38 2.60 37 2.70 36 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

7 1 ~

35 2.80 34 33 2.90 32 3.00 31 3.1O 'la 3.20 30 3.30 3.40 29 3.50 28 9 1 ~

3.60 27

22

2.438 2.450 2.489 2.500 2.527

I31~ I31~ I 31~

0.1015 0.1024 O.1 040 0.1063 0.1065

-F Inch mm -

t

mm

131~

60 60 60 60 60

2.578 2.600 2.642 2.700 2.705

1 71~ 1 7116 1 71~6 1 71' 6 1 7116

37 37 37 37 37

64 64 64 64 64

0.1094 0.11 O0 0.1 102 0.1110 0.1130

2.779 2.794 2.800 2.819 2.870

1 '12 1 '12 1 '12 1 712 1 'h

38 38 38 38 38

67 67 67 67 67

0.1 142 0.1 160 0.1181 0.1200 0.1220

2.900 2.946 3.000 3.048 3.1 O0

1 5h

41 41 41 41 41

70 70 70 70 70

0.1 250 0.1260 O.1285 0.1299 0.1339

3.175 3.200 3.264 3.300 3.400

41 41 41 44 44

70 70 70 73 73

0.1360 0.1378 0.1405 0.1406 0.1417

3.454 3.500 3.569 3.571 3.600

44 44 44 44 48

73 73 73 73 76

o.1440

48 48 48 48 48

76 76 76 76 76

51 51 51 51 51

79 79 79 79 79

3.80

0.1470 0.1495 0.1496 0.1 520 0.1 535 O.1540 0.1 562 0.1570

3.861 3.900 3.912 3.967 3.988

131~

I51~ I 510 I 51~ I51~ 1 5t8

I5 1 ~ 1 5h 13/4

1%

1% 1% 1 314 1 3/4 171~

1 7h 1 7b 1 'Ia

I71~ 1 71s

2 2 2 2 2 -

10

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Overall Length

35 35 35 35 35

3.658 3.700 3.734 3.797 3.800

3.90 23

0.0960 0.0965 0.0980 0.0984 0.0995

O.1 457

24

t

Millimeter .Equivalent

3.70 26 25

'132

i

Flute Length

Decimal Inch Equivalent

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

ASME B 9 4 . 2 L M 93

m 0759670 0540666

5T2

m

TWIST DRILLS

ASME B94.11M-1993

TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS JOBBERS LENGTH - FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D) Diameter of Drill Decimal Inch Equivalent

D Fraction

No.

Ltr.

Millimeter

4.00 21 20

l

a

4.1O 4.20 19

4.30 18

'

1/64

17 4.40 16 4.50 15 4.60

x

14 13

4.70

6

4.80

Flute Length

12

11

4.90 10 9 5.00

F

Millimeter Equivalent

Inch

mm

0.1575 O.1 590 0.1610 0.1614 O.1654

4.000 54 4.039 54 4.089 54 4.1O0 54 4.200 54

2v8 211~ 211~ 2'1~ 2v8

O.1660 0.1693 0.1695 0.1719 0.1730

4.216 54 4.300 4.305 4.366 4.394 56

2v8 2v8 2% 2'la 23h6

54 54 54

0.1732 0.1770 0.1772 0.1800 0.1 181

4.400 56 23h 4.496 2% 6 4.500 2% 6 4.572 2% 6 4.600 56 23h

56 56 56

0.1820 0.1850 O.1875 O.1890 0.1 o91

4.623 4.700 4.762 4.800 4.851

2% 6 59 251'~ 25t' 6 25/16 251~6

0.1929 0.1935 0.1960 0.1969

4.900 4.915 4.978 5.000 5.055

2~116 2~116 2% 6 2% 6 2% 6

5.1 O0 5.1 05 5.1 59 5.182 5.200

271'~ 271'~ 271'~ 2'12 2'12

62 62 62 64 64

5.220 5.300 5.309 5.400 5.41 O

2'12 2'12 2'12 2'12

64 64 64 64 64

2'12 2'12 251~

64 64 67

5.500 5.558 5.600 5.613 5.700

2'12

56 59 59 59 .

62 62 62 62 62

11 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

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ASME B94.LLM

93

m 0759670 0540667 439 m

TWIST DRILLS

ASME B94.11M-1993

TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS JOBBERS LENGTH - FRACTIONAL, NUMBER, LETER AND METRIC SIZES (CONT’D)

r

Diameter of Drill

r

I

Fraction

No.

Ltr.

Millimeter

1 5.80 5.90

’5/M

A

6.00

B 6.1O C 6.20

D 6.30 1’4

E 6.40 6.50

F 6.60

G 6.70

’’/M --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

H 6.80 6.90

I 7.00

J 7.1 O

K

9h~ 7.20 7.30

L 7.40

M 7.50 19/64

7.60

N 7.70 7.80

t

Flute Length

f

Overall Length

Decimal Inch Equivalent

Millimeter Equivalent

0.2280 0.2283 0.2323 0.2340 0.2344

5.791 5.800 5.900 5.944 5.953

67 67 67 67 67

98 98 98 98 98

0.2362 0.2380 0.2402 0.2420 0.2441

6.000 6.045 6.1 O0 6.1 47 6.200

70 70 70 70 70

102 102 1o2 102 102

0.2460 0.2480 0.2500 0.2520 0.2559

6.248 6.300 6.350 6.400 6.500

70 70 70 73 73

102 1o2 102 105 105

0.2570 0.2598 0.261 O 0.2638 0.2656

6.528 6.600 6.629 6.700 6.746

73 73 73 73 73

105 105 105 105 105

0.2660 0.2677 0.271 7 0.2720 0.2756

6.756 6.800 6.900 6.909 7.000

73 73 73 73 73

105 105 105 105 105

0.2770 0.2795 0.281 O 0.2812 0.2835

7.036 7.100 7.137 7.142 7.200

73 75 75 75 75

105 108 108 108 108

0.2874 0.2900 0.2913 0.2950 0.2953

7.300 7.366 7.400 7.493 7.500

75 75 78 78 78

108 108 111 111 111

0.2969 0.2992 0.3020 0.3031 0.3071

7.541 7.600 7.671 7.700 7.800

78 78 78 81 81

111 111 111 114 114

mm

12

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L mm

I

ASME B7q.LLM

73

m

m

07576700540bb8375

TWIST DRILLS

ASME B94.11M-1993

TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS JOBBERS LENGTH - FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT’D)

T

Diameter of Drill

T

1 Fraction

No.

Ltr.

Millimeter

7.90 51~fi

8.00

O 8.10 8.20 P

8.30 21/64

8.40

Q 8.50 8.60

R 8.70 ‘132

8.80 S 8.90 9.00 T

9.1 o 23/64

9.20 9.30

U 9.40 9.50 31~

V

9.60 9.70 9.80

W 9.90 25/64

10.00 X

10.20 Y

Decimal Inch Equivalent

Millimeter Equivalent

0.31 1 O 0.3125 0.31 50 0.3160 0.3 189

T

Flute Length

F

f

mm

mm

7.900 7.938 8.000 8.026 8.1 O0

81 81 81 81 84

114 114 114 114 117

0.3228 0.3230 0.3268 0.3281 0.3307

8.200 8.204 8.300 8.334 8.400

84 84 84 84 87

117 117 117 117 121

0.3320 0.3346 0.3386 0.3390 0.3425

8.433 8.500 8.600 8.61 1 8.700

87 87 87 87 87

121 121 121 121 121

0.3438 0.3465 0.3480 0.3504 0.3543

8.733 8.800 8.839 8.900 9.000

87 89 89 89 89

121 124 124 124 124

0.3580 0.3583 0.3594 0.3622 0.3661

9.093 9.1 O0 9.129 9.200 9.300

89 89 89 92 92

124 124 124 127 127

0.3680 0.3701 0.3740 0.3750 0.3770

9.347 9.400 9.500 9.525 9.576

92 92 92 92 92

127 127 127 127 127

0.3780 0.381 9 0.3858 0.3860 0.3898

9.600 9.700 9.800 9.804 9.900

95 95 95 95 95

130 130 130 130 130

0.3906 0.3937 0.3970 0.401 6 0.4040

9.921 10.000 10.084 10.200 10.262

95 95 95 98 98

130 130 130 133 133

13 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Overall Length

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

ASME B 9 4 - L L M 93

m 07.59670 0540669 201 m

TWIST DRILLS

ASME B94.11M-1993

TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS JOBBERS LENGTH - FRACTIONAL, NUMBER, LElTER AND METRIC SIZES (CONT'D)

D Fraction

No.

Ltr.

Millimeter

'3/32 Z 10.50 27/M

10.80 11.00 '/i6

11.20 11.50 "/M

11.80 5h2

12.00 12.20 31/M

12.50 'I2

12.90 13.00 33/M

13.20 "I32

13.50 13.80

t

Flute Length

f

Overall Length

Decimal Inch Equivalent

Millimeter Equivalent

0.4062 0.41 30 0.41 34 0.42 19 0.4252

10.31 7 10.490 10.500 10.716 10.800

98 98 98 1O0 103

133 133 133 137 140

0.4331 0.4375 0.4409 0.4528 0.4531

11.o00 11.112 11.200 11500 11.509

103 103 106 106 106

140 140 143 143 143

0.4646 0.4688 0.4724 0.4803 0.4844

11.800 11.908 12.000 12.200 12.304

110 110 111 111 111

146 146 149 149 149

0.4921 0.5000 0.5039 0.51 18 0.51 56

12.500 12.700 12.800 13.000 13.096

114 114 114 114 122

152 152 152 152 168

0.5197 0.531 2 0.5315 0.5433 0.5469

13.200 13.494 13.500 13.800 13.891

122 122 122 122 122

168 168 168 168 168

0.5512 0.5610 0.5625 0.5709 0.5781

14.000 14.250 14.288 14.500 14.684

122 122 122 122 122

168 168 168 168 168

0.5807 0.5906 0.5938 0.6004 0.6094

14.750 15.000 15.083 15.250 15.479

132 132 132 132 132

181 181 181 181 181

0.61 02 0.6201 0.6250 0.6299 0.6398

15.500 15.750 15.875 16.000 16.250

132 132 132 132 132

181 181 181 181 181

F mm

L mm

3%d

14.00 14.25 91' 5

14.50 37/M

14.75 15.00 "132

15.25 391~

15.50 15.75 51~

16.00 16.25

14

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

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--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

T

Diameter of Drill

ASflE B94-LLfl 9 3

i

0759670 0540670 T23

ASME B94.11M-1993

TWIST DRILLS

TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS JOBBERS LENGTH - FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D) Diameter of Drill

D Fraction

No.

Ltr.

Millimeter

4'/64

16.50 2'/32

16.75 17.00 431~

17.25 "/i8

17.50

Decimal Inch Equivalent 0.6406 0.6496 0.6562 0.6594 0.6693 0.671 9 0.6791 0.6875 0.6890

1

Millimeter Equivalent

I

16.271 5% 16.500 16.667 5% 16.750 17.000 17.066 17.250 17.462 17.500

I

Inch 6

5%6 6

5Va 551a 5% 5% 5% 5%

mm

!

132 132 132 143 143

L

143 143 143 143

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

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t

Overall Length 1

194 194 194 194

TWIST DRILLS

ASME B94.11M-1993

a L Chamfer sizes 3/32 in. and larger. For sizes under 3/32 in. a chamfer or conical point may be used at the manufacturer's option.

See Table 10 for tolerances

O

TABLE 2A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS TAPER LENGTH - THROUGH in. (12.7 mm) DIA. FRACTIONAL, NUMBER, AND METRIC SIZES

'h

Diameter of Drill

Flute Length

T

D Fraction

No.

mm

1 .o0 60 59 1 .O5

58 57 1.10 1.15 56

1.20 1.25 1.30 55 1.35 54 1.40 1.45 1.50 53 1.55 1.60 52 1.65 1.70 51 1.75 50 1.80

f

Overall Length

Decimal Inch Equivalent

Millimeter Equivalent

0.0394 0.0400 0.041O 0.0413 0.0420

1 .o00 1.016 1 .O41 1 .O50 1 .O67

29 29 29 29 29

57 57 57 57 57

0.0430 0.0433 0.0453 0.0465 0.0469

1 .O92 1.100 1.150 1.181 1.1 91

29 29 29 29 29

57 57 57 57 57

0.0472 0.0492 0.0512 0.0520 0.0531

1.200 1.250 1.300 1.321 1.350

44

76 76 76 76 76

0.0550 0.0551 0.0571 0.0591 0.0595

1.397 1.400 1.450 1.500 1.51 1

44

0.0610 0.0625 0.0630 0.0635 0.0650

1.550 1.588 1.600 1.613 1.650

44 44

51 51 51

76 76 95 95 95

0.0669 0.0670 0.0689 0.0700 0.0709

1.700 1.702 1.750 1.778 1.800

51 51 51 51 51

95 95 95 95 95

F mm

44 44

44 44

44

44 44 44

16 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

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L

mm

76 76 76 76 76

O

O

ASME B94.LLM

i

93 W 0'7596'70 0540672 B T b W

ASME B94.11M-1993

TWIST DRILLS

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

TABLE2AGENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS TAPER LENGTH - THROUGH '/2 in. (12.7 mm) DIA. FRACTIONAL, NUMBER, AND METRIC SIZES (CONT'D)

r

Diameter of Drill

r

D Fraction

No.

mm 1.85

49 1.so 48 1.S5

47 2.00 2.05 46 45 2.10 2.1 5

44 2.20 2.25 43 2.30 2.35 42

2.40 41 2.45 40 2.50 39 38 2.60 37 2.70 36 35 2.80 34 33 2.90 32 3.00

t

Flute Length

F

Decimal Inch Equivalent

Millimeter Equivalent

0.0728 0.0730 0.0748 0.0760 0.0768

1.850 1.854 1900 1.930 1.950

51 51 51 51 51

95 95 95 95 95

0.0781 0.0785 0.0787 0.0807 0.0810

1.984 1.994 2.000 2.050 2.057

51 57 57 57 57

95 108 108 1 08 108

0.0820 0.0827 0.0846 0.0860 0.0866

2.083 2.1 O0 2.1 50 2.1 84 2.200

57 57 57 57 57

1 08 1 08 1 08 1 08 108

0.0886 0.0890 0.0906 0.0925 0.0935

2.250 2.261 2.300 2.350 2.375

57 57 57 57 57

108 108 108 108 1 08

0.0938 0.0945 0.0960 0.0965 0.0980

2.383 2.400 2.438 2.450 2.489

57 64 64 64 64

108 117 117 117 117

0.0984 0.0995 0.1 O15 0.1 024 0.1 040

2.500 2.527 2.578 2.600 2.642

64 64 64 64 64

117 117 117 117 117

0.1 063 0.1 065 0.1 094 0.1 1O0 0.1 102

2.700 2.705 2.779 2.794 2.800

64 64 64 70 70

117 117 117 130 130

0.1 110 0.1 130 0.1 142 0.1 160 0.1181

2.819 2.870 2.900 2.946 3.000

70 70 70 70 70

130 130 130 130 130

mm

17

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Overall Length

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1 mm

ASME B 9 4 - L L M 93

ASME

m

0759b70 0 5 4 0 6 7 3 732

m TWIST DRILLS

1M-1993

e Diameter of Drill

D Fraction

No.

mm

31 3.1 O

'h 3.20 30 3.30 3.40 29 3.50 28 9/64

3.60 27 3.70 26 25 3.80 24 3.90 23 '132

22 4.00 21 20 4.1 O 4.20 19 4.30 18

'

1/64

17 4.40 16 4.50 15 4.60 14 13

3116

4.70

Decimal Inch Equivalent

Millimeter Equivalent

0.1 200 0.1 220 0.1 250 0.1 260 0.1 285

t

Inch

mm

Inch

mm

3.048 3.1 O0 3.175 3.200 3.264

Z3/4 z3/4 23/4 3 3

70 70

5% 5u 5% 5%

130 130 70 130 137 137

0.1 299 O. 1339 O. 1360 O. 1378 O. 1405

3.300 3.400 3.454 3.500 3.569

3 3 3 3 3

76 76 76 76 76

5318 S3/0 5318 531e 5318

137 137 137 137 137

O. 1406 0.1417 0.1 440 0.1 457 0.1470

3.571 3.600 3.658 3.700 3.734

3 3 3 3 3

76 76 76 76 76

531e 53l8 53/8 53h 5318

137 137 137 137 137

0.1495 O. 1496 0.1 520 0.1 535 0.1 540

3.797 3.800 3.861 3.900 3.912

3 3 3 3 3

76 76 76 76 76

5% 5% 53i8 578 5318

137 137 137 137 137

O. 1562 0.1570 0.1575 0.1590 0.1610

3.967 3.988 4.000 4.039 4.089

3 3% 33/~ S3/0 S3/0

76 86 86 86 86

5% 53l4 53/4 53l4 5Y4

137 146 146 146 146

0.1614 0.1654 0.1660 0.1 693 0.1 695

4.1 O0 4.200 4.2 16 4.300 4.305

33/~ 3% 378 331a 3%

86 86 86 86 86

5% 53l4 574 53/4

146 146 146 146 146

0.1719 0.1 730 0.1 732 0.1 770 0.1 772

4.366 4.394 4.400 4.496 4.500

3318 3318 33/~ 3% 33/~

86 86 86 86 86

O. 1800 0.1811 0.1820 0.1850 0.1875

4.572 4.600 4.623 4.700 4.762

33h 3318 3318 3318 3%

86 86 86 86 86

76 76

53l8

5%

5Y4 53/4 574 S3/4

146 146 146 146 146

S3/4 S3/4 S3/4 S3/4 S3/4

146 146 146 146 146

5%

18

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--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

TABLE 2A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS TAPER LENGTH - THROUGH '12 in. (12.7 mm) DIA. FRACTIONAL, NUMBER, AND METRIC SIZES (CONT'D)

O

O

O

TWIST DRILLS

ASME B94.11M-1993

O TABLE2AGENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS TAPER LENGTH - THROUGH in. (12.7 mm) DIA. FRACTIONAL, NUMBER, AND METRIC SIZES (CONT'D)

'h

-r

D Fraction

No.

mm

12 11

4.80

4.800 4.851 4.900 4.91 5 4.978

0.1 969 0.1 990 0.2008 0.2010 0.2031

F mm

f

6 6 6 6 6

152 152 152 152 152

5.000 5.055 5.1 O0 5.105 5.1 59

92 92 92 92 92

6 6 6 6 6

152 152 152 152 152

0.2040 0.2047 0.2055 0.2087 0.2090

5.1 82 5.200 5.220 5.300 5.309

92 92 92 92 92

6 6 6 6 6

152 152 152 152 152

0.21 26 0.21 30 0.21 65 0.21 88 0.2205

5.400 5.41 O 5.500 5.558 5.600

92 92 92 92 95

6 6 6 6 6'Is

152 152 152 152 156

5.80 5.90

0.2210 0.2244 0.2280 0.2283 0.2323

5.61 3 5.700 5.791 5.800 5.900

95 95 95 95 95

6'15 6'Is 6'15 6'15 6'15

156 156 156 156 156

6.00 6.1 O 6.20 6.30

0.2344 0.2362 0.2402 0.2441 0.2480

5.954 6.000 6.1 O0 6.200 6.300

95 95 95 95 95

6'15 6'15 61 '8 6'15 6%

156 156 156 156 156

0.2500 0.2520 0.2559 0.2656 0.2677

6.350 6.400 6.500 6.746 6.800

95 98 98 98 98

6 'Is 6 'h 6 '14 6'14 6'14

156 159 159 159 1 59

0.2756 0.2812 0.2835 0.2953 0.2969

7.000 7.142 7.200 7.500 7.541

98 98 102 102 102

6'14 6'14 6315 6315 6%

159 159 162 162 162

5.00 5.1 O 7 13/64 6 5.20 5 5.30 4 5.40 3 5.50 5.60 2 5.70 1

6.40 6.50 6.80 7.00 7.20 7.50

.

19

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

1

92 92 92 92 92

8

l 1.

0.1 890 0.1910 0.1 929 0.1 935 0.1 960

t

Overall Length

mm

4.90

3

Millimeter Equivalent

Flute Length

Inch

10 9

I

Decimal Inch Equivalent

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

r

Diameter of Drill

_ _ _ _ _ _ ~

ASME B S Y - L L M 93 m 0759b70 05YOb75 505 m

TWIST DRILLS

ASME B94.11M-1993

TABLE 2A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS TAPER LENGTH - THROUGH in. (12.7 mm) DIA. FRACTIONAL, NUMBER, AND METRIC SIZES (CONT'D)

'h

D Fraction

No.

mm 7.80

8.00 8.20

8.50 8.80 9.00

9.20 9.50 9.80

10.00 10.20 10.50

10.80 11.00 11.20 11.50

1 1.80 12.00 12.20

12.50

t

Flute Length

f

Decimal Inch Equivalent

Millimeter Equivalent

0.3071 0.3125 0.3150 0.3228 0.3281

7.800 7.938 8.000 8.200 8.334

1 02 102 105 105 105

162 162 165 165 165

0.3346 0.3438 0.3465 0.3543 0.3594

8.500 8.733 8.800 9.000 9.1 29

105 105 108 108 108

165 165 171 171 171

0.3622 0.3740 0.3750 0.3858 0.3906

9.200 9.500 9.525 9.800 9.921

1 08 1 08 108 111 111

171 171 171 178 178

0.3937 0.4016 0.4062 0.4134 0.4219

10.000 10.200 10.31 7 10.500 10.71 6

111 111 111 117 117

178 178 178 184 184

0.4252 0.4331 0.4375 0.4409 0.4528

10.800 11.000 11.112 11.200 11.500

117 117 117 121 121

184 184 184 190 190

0.4531 0.4646 0.4688 0.4724 0.4803

1 1.509 11.800 1 1.908 12.000 12.200

121 121 121 121 121

190 190 190 1 97 197

0.4844 0.4921 0.5000

12.304 12.500 12.700

121 121 121

197 1 97 197

F mm

20

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Overall Length

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L

mm

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

T

Diameter of Drill

TWIST DRILLS

ASME 894.11M-1993

Chamfer

1

rs1 Nominal shank size

is same as nominal drillTable See size

TABLE 2B

Diameter of Drill

D Frac. mm 12.80 13.00 33/64

13.20

?h2 13.50 13.80 35/64

14.00 14.25 9/16

14.50 371~

14.75 15.00

'%2 15.25 39/64 15.50 15.75 5h 16.00 16.25 41, 16.50 I

I 10 for tolerances drill

GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS TAPER LENGTH - OVER in. (12.7 mm) DIA. FRACTIONAL AND METRIC SIZES

'h

Overall

Flute

Decimal Inch Equiv.

Millimeter Equiv.

mm

0.5039 0.51 18 0.5156 0.51 97 0.5312

12.800 13.000 13.096 13.200 13.492

121 121 121 121 121

0.5315 0.5433 0.5469 0.5512 0.561O

13.500 13.800 13.891 14.000 14.250

0.5625 0.5709 0.5781 0.5807 0.5906

I 5

length Maximum Minimum of Body

I

Inch

I

mm

B Inch mm 4% 124 4% 124 4% 124 471a 124 41'0 124

mm

Inch

mm

251~ 2518 251~ 25h 25h

66 66 66 66 66

'I2

13 13 13 13 13

124 127 127 127 127

25h 23/4 23/4 Z3/4 23/4

66 70 70 70 70

'I2

5 5 5 5 5

127 127 127 127 127

Z3/4 3'h 3% 3'1s 3'18

70 79 79 79 79

5 5 5 5 5

127 127 127 127 127

3 'Is 3 'la 3'18 3' / E 3' / E

79 79 79 79 79

3% 3 'la 3% 3 'la 3%

79 79 79 79 79

8 8 8 8 8

203 203 203 203 203

121 124 124 124 124

8 8'14 8'14 81 '4 8'14

203 210 210 210 210

41'0 5 5 5 5

14.288 14.500 14.684 14.750 15.000

124 124 124 124 124

8'14 8% 8% 8% 83/4

210 222 222 222 222

0.5938 0.6004 0.6094 0.61 02 0.6201

15.083 15.250 15.479 15.500 15.750

124 124 124 124 124

83/4 8% 8% 8Y4 83/4

222 222 222 222 222

0.6250 0.6299 0.6398 0.6406 0.6496

15.875 16.000 16.250 16.271 16.500

124 222 83/4 130 9 9 130 9 130 130 9

229 229 229 229

,

5

127 133 133 133 5'14 133 51'4 -

5 'h 51' 4

Inch

21 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

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-

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'I2 'I2 'I2 'I2

'I2 'I2 'I2 'I2

'I2 51~

=la 51~ 51~

51~ 510

510 5/s

510

51~

5/s 51~ 5/s 5/s

13 13 13 13 13 13 16 16 16 16 16 16 16 16 16 16 16 16 16 16

ASME

TWIST DRILLS

1M-1993

GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS TAPER LENGTH - OVER '12 in. (12.7 mm) DIA. FRACTIONAL AND METRIC SIZES (CONT'D)

TABLE 26

Diameter of Drill

mm

Equiv. 0.6562

16.75 0.6594 0.6693 17.00 0.671 9 0.6791 17.25 0.6875 17.50 0.6890 0.7031 18.00 0.7087 0.7 188 18.50 0.7283 0.7344 19.00 0.7480 0.7500 0.7656 0.7677 19.50 0.781 2 20.00 0.7874 0.7969 20.50 0.8071

21.O0

0.8125 0.8268 0.8281 0.8438

21.50 0.8465 0.8594 22.00 0.8661 0.8750 22.50 0.8858 0.8906 23.00 0.9055 0.9062 0.92 19 23.50 0.9252 0.9375 24.00 0.9449 0.9531 24.50 0.9646 0.9688 25.00 0.9843

r

Millimeter Equiv. 16.667 16.750 17.000 17.066 17.250

t

Flute Length

f

Minimum Length Maximum of Body

Overall Length

F L -mm Inch mm Inch 130 5% 9 229 5% 9% 235 137 235 9% 137 137 53/6 235 9% 53/6 235 137 9%

B Inch mm 5% 133 140 5% 5% 140 5% 140 5% 140 ~

mm 79 79 79 79 79

51~

51~ 51~ 5/E 5 / ~

17.462 17.500 17.859 18.000 18.258

5% 5% 5% 5% 5%

137 143 143 143 143

9% 9% 9% 9% 9%

235 241 241 241 241

5% !j3/4 5% 5% 5%

140 146 146 146 146

79 79 79 79 79

18.500 18.654 19.000 19.050 19.446

5% 5% 5% 5% 6

149 149 149 149 152

9%

248 248 248 248 251

6 9%6 6 6 6%

152 152 152 152 156

79 79 79 79 79

19.500 19.842 20.000 20.241 20.500

6 6 6% 6% 6%

152 152 156 156 156

91'8 91'0 10 10 10

251 251 254 254 254

6% 6% 61 '4 61 '4 6V4

156 156 159 159 159

79 79 79 79 79

20.638 21.o00 21 .O34 21.433 21.500

6% 6% 6% 6% 6%

156 156 156 156 156

10 10 10 10 10

254 254 254 254 254

6 6'14 6V4 6V4 B1/4

159 159 159 159 159

79 79 79 79 79

21.829 22.000 22.225 22.500 22.621

6% 6% 6% 6% 6%

156 156 156 156 156

10 10 10 10 10

254 254 254 254 254

6V4 6V4 6V4 6V4 61 '4

159 159 159 159 159

79 79 79 79 79

23.000 23.017 23.41 6 23.500 23.81 2

6% 6% 6% 6% 6%

156 156 156 156 156

10 10 103/4 103h 103/4

254 254 273 273 273

6V4 61 '4 6V4 61 '4 6

159 159 159 159 159

79 79 98 98 98

51~

279 279 279 279 279

6% 116% 6% 6% 6% -

165 165 165 165 165 -

98 98 98 98 98

51~

24.000 24.209 24.500 24.608 25.000

6% 6% 6% 61' 6 63/8 -

162 162 162 162 162 -

93l4 93l4 9%

11 11 11 11

22 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

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Inch

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510 510

510 5/s

51~

51~ 5/s 51~ 51~ 51~

518

51~ 51~ 51~ 5/s

51~ 51~

510 518

51~

51~

51~ V8

51~

51~ 51~ 5!s 518

51~ 51~ 5/9

510

mm 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16

ASME B 9 4 * l t L M 9 3

m 0759670 0540678

214

m

ASME I394.1 1M-1993

TWIST DRILLS

TABLE2BGENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS TAPER LENGTH OVER ’h in. (12.7 mm) DIA. FRACTIONAL AND METRIC SIZES (CONT’D)

-

D

F

lecimal Inch mm Equiv. 0.9844 1.o000 !5.50 1.O039 1.O1 56 Z6.00 1.O236

26.50

Z7.00

27.50 28.00

Millimeter Equiv.

i-

Flute Length

F ~

Overall Length L mm

Length of Body

B -

Minimum Length of Shank S mm

F

Maxirnum Length of Neck

N Inch

mm

51~

16 16 16 16 16

279 279 283 283 283

mm 165 165 168 168 168

165 168 168 168 168

283 286 286 286 286

168 172 172 172 172

98 98 98 98 98

27.384 27.500 27.783 28.000 28.1 79

175 175 175 181 181

292 292 292 298 298

178 178 178 184 184

98 98 98 98 98

51~

1.1220 1.1 250 1.1406 1.14J7 1.1 562

28.500 28.575 28.971 29.000 29.367

181 181 184 184 184

298 298 302 302 302

184 184 187 187 187

98 98 98 98 98

510

1.1614 1.1719 1.1811 1.1875 1.2008

29.500 29.766 30.000 30.162 30.500

187 187 187 187 190

305 305 305 305 308

191 191 191 191 194

98 98 98 98 98

51~

1.2031 1.2188 1.2205 1.2344 1.2402

30.559 30.958 31.O00 31.354 31.500

190 190 200 200 200

308 308 318 318 318

194 194 203 203 203

98 98 98 98 98

51~

1.2500 1.2598 1.2795 1.2812 1.2992

31.750 32.000 32.500 32.542 33.000

200 216 216 216 219

318 359 359 359 362

203 219 21 9 219 222

98 124 124 124 124

1.3125 1.31 89 1.3386 1.3438 1.3583

33.338 33.500 34.000 34.1 33 34.500

219 222 222 222 225 __

362 365 365 365 368 -

222 225 225 225 229 -

124 124 124 124 124

25.004 25.400 25.500 25.796 26.000

mm 162 162 165 165 165

1.031 2 1.O433 1.O469 1.0625 1.O630

26.1 92 26.560 26.591 26.988 27.000

1.0781 1.0827 1.0938 1.1024 1.1094

-

98 98 98 98 98

51~ 51~ 51~ 51~

16 16 16 16 16

51~

51~ 510

510 51~

16 16 16 16 16

51~ 51~

5 h 510

I

28.50

29.00

29.50 30.00 30.50

31.O0 31.50

32.00 32.50 33.00

33.50 34.00 34.50 -

23

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51~

51~ 51~

51~

51~ 51~ 510 51~

51~

51~ 51~ 51~

51~

=/S 51~ 51~

5 h

51~

51~ 51~ 510 510

16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

r

Diameter of Dr¡ill

TWIST DRILLS

ASME

O TABLE 2B

GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS TAPER LENGTH OVER ’h in. (12.7 mm) DIA. FRACTIONAL AND METRIC SIZES (CONT’D)

-

T

Diameter of Drill

T

D

Decimal Inch

mm 1.3750 35.00 35.50

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

36.00

1.4173

36.50

1.4370 1.4375

37.00 1.4688 37.50 38.00

Millimeter Equiv.

Flute Length

Overall Length

F

L

Equiv.

mm

Inch

mm

34.925 35.000 1.3780 35.500 1.3976 35.717 1.4062 36.000

225 229 229 229 232

14% 14% 145h 14% 14%

36.500 36.512 37.000 1.4567 37.308 37.500 1.4764

232 232 235 235 238 238 238 244 251 267

1.4961 38.000 1.5000 38.100 1.5625 39.688 1.6250 41.275 1.7500 44.450

F

Minimum Length Maximum of Body

BInchmm

Inch

368 371 371 371 375

mm 229 232 232 232 235

41’8 41’8 4% 4% 41’8

124 124 124 124 124

14% 14314 14?/8 14% 15

375 375 378 378 381

235 235 238 238 241

4% 41’8 41’8 4% 4?/8

124 124 124 124 124

15 15 15’14 15% 16%

381 381 387 397 413

241 241 247 254 270 -

d7/8 41’8 41’8 4% 4%

124 124 124 124 124

mm 518

51~ 5/s

51~

5h

51~

51~

5h 5h

5h

5h 5h 51~

% 3/4

16 16 16 16 16

O

16 16 16 16 16 16 16 16 19 19

O

24

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

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A S I E B94.11M

93

m

0759670 0540680 9 7 2

m

TWIST DRILLS

ASME B94.11M-1993

3/32in. and larger. For sizes under 3/32 in. a chamfer or conical point may be used at the manufacturer's option.

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

L Chamfer sizes

See Table 10 for tolerances

TABLE 3A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS SCREW MACHINE LENGTH - THROUGH 1 in. (25.4 mm) DIA. FRACTIONAL, NUMBER, LETTER AND METRIC SIZES

r

i

Diameter of Dr¡ D

Fraction

No.

Ltr.

mm

1 .o0

60 59 1 .O5 58 57 1.10 1.15 56 3/64

1.20 1.25 1.30 55

.O

1.35 54 1.40 1.45 1.50 53 1.55 1.60 52 1.65

Decimal Inch Equivalent

T

Millimeter Equivalent

t

Flute Length F

t

L

mm

Inch

mm

0.0394 0.0400 0.041O 0.0413 0.0420

1,000 1.016 1 .O41 1 .O50 1 .O67

13 13 13 13 13

I 3/s I 31~

35 35 35 35 35

0.0430 0.0433 0.0453 0.0465 0.0469

1.092 1.100 1.1 50 1.181 1.191

13 13 13 13 13

I 3/s

0.0472 0.0492 0.0512 0.0520 0.0531

1.200 1.250 1.300 1.321 1.350

16 16 16 16 16

I 51~ I =/S I51~ I51~

0.0500 0.0551 0.0571 0.0591 0.0595

1.397 1.400 1.450 1.500 1.511

16 16 16 16 16

I5 1 ~ I51~

0.0610 0.0625 0.0630 0.0635 0.0650

1.550 1.588 1.600 1.613 1.650

16 16 17 17 17

1 51a

25

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

T Overall Length

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1 3/E

I 3/s I 3/a I 31~

I31~ I 3/s I 3/s

I =/S

1 1 5/s

I5 1 ~

I51~ 1 1 1 1 ~ ~

1 11/~6 111/16

35 35 35 35 35 41 41 41 41 41 41 41 41 41 41 41 41 43 43 43

ASME B94.11 M-I 993

TWIST DRILLS

r

Diameter of Drill

T

D Fraction

No.

Ltr.

mm

1.70 51 1.75 50 1.80 1.85 49 1.90 48 1.95

47 2.00 2.05 46 45 2.10 2.1 5 44 2.20 2.25 43 2.30 2.35 42

2.40 41 2.45 40 2.50 39 38 2.60 37 2.70 36 35 2.80

Decimal Inch Equivalent

Millimeter Equivalent

0.0669 0.0670 0.0689 0.0700 0.0709

t

Flute Length

Overall Length

F

L mm

mm

1.700 1.702 1.750 1.778 1.800

17 17 17 17 17

43 43 43

0.0728 0.0730 0.0748 0.0760 0.0768

1.850 1.854 1.goo 1.930 1.950

17 17 17 17 17

43

0.0781 0.0785 0.0787 0.0807 0.081O

1.984 1.994 2.000 2.050 2.057

17 17 17 19 19

43 43 43 44 44

0.0820 0.0827 0.0846 0.0860 0.0866

2.083 2.100 2.1 50 2.184 2.200

19 19 19 19 19

44

0.0886 0.0890 0.0906 0.0925 0.0935

2.250 2.261 2.300 2.350 2.375

19 19 19 19 19

44

0.0938 0.0945 0.0960 0.0965 0.0980

2.383 2.400 2.438 2.450 2.489

19 21 21 21 21

44

0.0984 0.0995 0.1015 0.1 024 0.1 040

2.500 2.527 2.578 2.600 2.642

21 21 21 21 21

46 46 46 46 46

0.1 063 0.1 065 0.1 094 0.1 1O0 0.1 102

2.700 2.705 2.779 2.794 2.800

21 21 21 22 22

46 46 46 48 48

26

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

-

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

43

43

43 43 43 43

44 44

44 44

44 44

44 44

46 46 46 46

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

TABLE 3A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS SCREW MACHINE LENGTH - THROUGH 1 in. (25.4 mm) DIA. FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D)

TWIST DRILLS

1

894.1

ASME

M-1993

TABLE 3A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS SCREW MACHINE LENGTH - THROUGH 1 in. (25.4 mm) DIA. FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D)

r

Diameter of Drill

Fraction

- Ltr. No.

mm

34 33 2.90 32 3.00 31 3.10 3.20 30 3.30 3.40 29 3.50 28

3.60 27 3.70 26 25 3.80 24 3.90 23

22 4.00 21 20 4.1 O 4.20 19 4.30 18

17 4.40 16 4.50

t

Flute Length

Decimal Inch Equivalent

Millimeter Equivalent

0.1110 0.1 130 0.1 142 0.1 160 0.1 181

2.81 9 2.870 2.900 2.946 3.000

22 22 22 22 22

48 48 48 48 48

0.1200 0.1220 O. 1250 O. 1260 0.1285

3.048 3.1O0 3.175 3.200 3.264

22 22 22 24 24

48 48 48 49 49

0.1 299 O. 1339 0.1360 0.1378 0.1405

3.300 3.400 3.454 3.500 3.569

24 24 24 24 24

49 49 49 49 49

0.1 406 0.1 417 0.1 440 0.1 457 0.1 470

3.571 3.600 3.658 3.700 3.734

24 25 25 25 25

49 52 52 52 52

0.1 495 0.1 496 0.1 520 0.1 535 O. 1 540

3.797 3.800 3.861 3.900 3.912

25 25 25 25 25

52 52 52 52 52

O. 1562 0.1 570 0.1 575 O. 1 590 0.1610

3.967 3.988 4.000 4.039 4.089

25 27 27 27 27

52 54 54 54 54

0.1614 0.1654 0.1660 0.1 693 0.1 695

4.1 O0 4.200 4.21 6 4.300 4.305

27 27 27 27 27

54 54 54 54 54

0.1719 0.1 730 0.1 732 0.1770 0.1772

4.366 4.394 4.400 4.496 4.500

27 29 29 29 29

54 56 56 56 56

F mm

27

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

f

Overall Length

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

L mm

TWIST DRILLS

ASME B94.11M-1993

TABLE 3A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS SCREW MACHINE LENGTH - THROUGH 1 in. (25.4 mm) DIA. FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D)

I

Diameter of Drill

D

I

Decimal Inch Equivalent

Flute Length

1

~

Overall Length

L

F

-Millimeter Equivalent

Inch

mm

Inch

mm

0.1800 0.1 181 0.1820 0.1850 0.1875

4.572 4.600 4.623 4.700 4.762

1 118 1 '/S 1 '/S 1 '/S 1 '/S

29 29 29 29 29

2% 6 23116

56 56 56 56 56

0.1890 0.1910 0.1929 O.1935 O.1960

4.800 4.851 4.900 4.915 4.978

13116

1 31~6 1 3/r6 1 3116 1 3116

30 30 30 30 30

2'14 2'14 2'14 2114 h 2'

57 57 57 57 57

O.1969 o.1990 0.2008 0.201o 0.2031

5.000 5.055 5.1O0 5.105 5.159

1 3116 1 3116 1 3116 1 3116 1 3116

30 30 30 30 30

2l/4 2l/4 2'14 2'14 2'14

57 57 57 57 57

0.2040 0.2047 0.2055 0.2087 0.2090

5.182 5.200 5.220 5.300 5.309

1 '14 1 '14 1 l/4 1 '14

32 32 32 32 32

231~ 2% 231~ 231~ 231~

60 60 60 60 60

0.2126 0.2130 0.2165 0.2 188 0.2205

5.400 5.41O 5.500 5.558 5.600

1 '14 1 '14 1 '14 1 '14

32 32 32 32 33

231~ 23h 23/8 231~ 6 271~

60 60 60 60 62

0.221o 0.2244 0.2280 0.2283 0.2323

5.613 5.700 5.791 5.800 5.900

151~6

1 5/76 1 5/16 1 5116

33 33 33 33 33

2% 6 27/16 27h 2%~ 2% 6

62 62 62 62 62

0.2340 0.2344 0.2362 0.2380 0.2402

5.944 5.954 6.000 6.045 6.1 O0

1 51~6 1 5116 1 3h 1 31a 1 3h

33 33 35 35 35

271'6 2% 5 2712 2712 2%

62 62 64 64 64

0.2420 0.2441 0.2460 0.2480 0.2500

6.147 6.200 6.248 6.300 6.350

131~

35 35 35 35 35

2112 2112 2112 2712 2'12

64 64 64 64 64

1 '14

23116

I

15/76

151~6

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

131~

131~ 131~ 131~

28

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23h 23h

ASME B 9 4 * L L M 73

m

O757670 0540684 518

m

TWIST DRILLS

ASME B94.11M-1993

O TABLE 3A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS SCREW MACHINE LENGTH THROUGH 1 in. (25.4 mm) DIA. FRACTIONAL, NUMBER, LETTER AND METRIC SIZES [CONT'D)

-

I

Diameter of Dril¡

D Fraction

No.

Ltr.

mm

6.40 6.50

a

F

6.60

G 6.70 "/M

H

6.80 6.90 I

7.00 J

7.1O

K

O

'132

7.20 7.30 L

7.40 M

7.50 "/M

7.60 N

7.70 7.80 7.90

O

511B

8.00

O 8.1O 8.20 P

8.30 2'lM

8.40 Q

8.50 8.60

~~

t

Flute Length

Decimal Inch Equivalent

Millimeter Equivalent

0.2520 0.2559 0.2570 0.2598 0.261O

6.400 6.500 6.528 6.600 6.629

1 7116 1 ~116 1 7116

0.2638 0.2656 0.2660 0.2677 0.2717

-F Inch mm -

L

mm

1 7116

37 37 37 37 37

67 67 67 67 67

6.700 6.746 6.756 6.800 6.900

1 7116 1 'Il 6 1 'I2 1 112 1 112

37 37 38 38 38

67 67 68 68 68

0.2720 0.2756 0.2770 0.2795 0.281O

6.909 7.000 7.036 7.100 7.137

1 112 1 '12 1 112 1 112 1 112

38 38 38 38 38

68 68 68 68 68

0.2812 0.2835 0.2874 0.2900 0.2913

7.142 7.200 7.300 7.366 7.400

1 112 1 1 gil 6 1 91'6 1 91' 6

38 40 40 40 40

68 70 70 70 70

0.2950 0.2953 0.2969 0.2992 0.3020

7.493 7.500 7.541 7.600 7.671

1 9116

40 40 40 41 41

70 70 70 71 71

0.3031 0.3071 0.311 O 0.3125 0.31 50

7.700 7.800 7.900 7.938 8.000

1 5hl 1 5hl 1 5h

41 41 41 41 43

71 71 71 71 75

0.31 60 0.31 89 0.3228 0.3230 0.3268

8.026 8.100 8.200 8.204 8.300

1 )v16 1 1111fi

43 43 43 43 43

75 75 75 75 75

0.3281 0.3307 0.3320 0.3346 0.3386

8.334 8.400 8.433 8.500 8.600

1 1111fi

43 43 43 43 43

75 76 76 76 76

17h

19/16

1 9ll6

I 51~ I 51~

I 51~ 1 111~6

111116

1 1 1 1 ~ ~

I 111~6

1 111~6 1 111~6 1 l1/16 -

O 29 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Overall Length

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TWIST DRILLS

ASME 894.11M-I993 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

O TABLE 3A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS SCREW MACHINE LENGTH THROUGH 1 in. (25.4 mm) DIA. FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D)

-

Diameter of Drill 1

Fraction

No.

Ltr.

mm

Decimal Inch Equivalent

Millimeter Equivalent

f

Flute Length

F mm

f

Overall Length

L mm

0.3390 0.3425 0.3438 0.3465 0.3480

8.61 1 8.700 8.733 8.800 8.839

43 43 43

0.3504 0.3543 0.3580 0.3583 0.3594

8.900 9.000 9.093 9.1 O0 9.1 29

44 44 44 44 44

78 78 78 78 78

9.40 9.50

0.3622 0.3661 0.3680 0.3701 0.3740

9.200 9.300 9.347 9.400 9.500

46 46 46 46 46

79 79 79 79 79

9.60 9.70 9.80

0.3750 0.3770 0.3780 0.381 9 0.3858

9.525 9.576 9.600 9.700 9.800

46 48 48 48 48

79 83 83 83 83

0.3860 0.3898 0.3906 0.3937 0.3970

9.804 9.900 9.921 10.000 10.084

48 48 48 49 49

83 83 83 84 84

0.4016 0.4040 0.4062 0.4130 0.4134

10.200 10.262 10.320 10.490 10.500

49 49 49 51 51

84 84 84 86 86

0.421 9 0.4252 0.4331 0.4375 0.4409

10.71 6 10.800 11.O00 11.112 1 1.200

51 52 52 52 54

86 87 87 87 90

0.4528 0.4531 0.4646 0.4688 0.4724

1 1.500 11.509 11.800 11.908 12.000

54 54 54 54 56

90 90 92 92 94

R 8.70 8.80

S 8.90 9.00

T 9.1 o

9.20 9.30

U

V

W 9.90 10.00

X 10.20

Y

z 10.50

10.80 11.o0 11.20 11.50 11.80 12.00

44 44

76 76 76 78 78

O

O

O

O 30

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

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ASME B94.lLM

0 7 5 9 6 7 0 0540b8b 390

93

m

ASME B94.11M-1993

TWIST DRILLS

O TABLE 3A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS SCREW MACHINE LENGTH - THROUGH 1 in. (25.4 mm) DIA. FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D)

r

Diameter of Drill

r

Ltr. No. -

mm

12.20 12.50

O

12.80 13.00 13.20 13.50 13.80 14.00 14.25

a

14.50 14.75 15.00

15.25 15.50 15.75

16.00 16.25 16.50

O

16.75 17.00 17.25

17.50 18.00 - -18.50

t

Flute Length

Decimal Inch Equivalent

Millimeter Equivalent

0.4803 0.4844 0.4921 0.5000 0.5039

12.200 12.304 12.500 12.700 12.800

23/16 231'6 2 'I4 21'4 23~

56 56 57 57 60

94 94 95 95 98

0.5118 0.5156 0.5197 0.5312 0.5315

13.000 13.096 13.200 13.492 13.500

23~ 231~ 231~ 231~ 231~

60 60 60 60 60

98 98 98 98 98

0.5433 0.5469 0.5512 0.561O 0.5625

13.800 13.891 14.000 14.250 14.288

2 '12 2'h 2'12 2'12 2'12

64 64 64 64 64

102 102 102 102 102

0.5709 0.5781 0.5807 0.5906 0.5938

14.500 14.684 14.750 15.000 15.083

25/a 2510 25/s 251~ 2 51a

67 67 67 67 67

105 105 105 105 105

0.6004 0.6094 0.61 02 0.6201 0.6250

15.250 15.479 15.500 15.750 15.815

2% 23/4 23/4 231~ 2314

70 70 70 70 70

108 108 108 108 108

0.6299 0.6398 0.6406 0.6496 0.6562

16.000 16.250 16.271 16.500 16.667

2JI8 2JA 2JI8 2J/a 2JA

73 73 73 73 73

114 114 114 114 114

0.6594 0.6693 0.6719 0.6791 0.6875

16.750 17.000 17.066 17.250 17.462

27h 2JI8 271~ 2718 2'18

J3 73 73 73 73

117 117 117 117 117

0.6890 0.7031 0.7087 0.7 I 88 0.7283

17.500 17.859 18.000 18.258 18.500

3 3 3 3 3'18 -

76 76 76 76 79

121 121 121 121 127

-F Inch mm -

31 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

f

Overall Length

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L mm

TWIST DRILLS

ASME 894.1 M-1993

TABLE 3A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS SCREW MACHINE LENGTH - THROUGH 1 in. (25.4 mm) DIA. FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT'D)

T

D

No.

Ltr.

mm 19.00

19.50

20.00 20.50

21.o0

21.50

22.00 22.50 23.00

23.50 24.00

24.50 25.00

t

Flute Length

f

Overall Length

Decimal Inch Equivalent

Millimeter Equivalent

0.7344 0.7480 0.7500 0.7656 0.7677

18.654 19.000 19.050 19.446 19.500

79 79 79 83 83

127 127 127 130 130

0.781 2 0.7874 0.7969 0.8071 0.81 25

19.845 20.000 20.241 20.500 20.638

83 86 86 86 86

130 133 133 133 133

0.8268 0.8281 0.8438 0.8465 0.8594

21.o00 2 .O34 1 21.433 2 1.500 21.829

89 89 89 89 89

137 137 137 140 140

0.8661 0.8750 0.8858 0.8906 0.9055

22.000 22.225 22.500 22.621 23.000

89 89 92 92 92

140 140 143 143 143

0.9062 0.921 9 0.9252 0.9375 0.9449

23.017 23.41 6 23.500 23.81 2 24.000

92 95 95 95 98

143 146 146 146 1 49

0.9531 0.9646 0.9688 0.9843 0.9844

24.209 24.500 24.608 25.000 25.004

98 98 98 1 02 102

149 149 149 152 152

1.o000

25.400

102

152

F

mm

32

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L mm

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

T

Diameter of Drill

TWIST DRILLS

ASME B94.11M-1993

See Table 10 for tolerances

TABLE 3B GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS SCREW MACHINE LENGTH - OVER 1 in. (25.4 mm) DIA. FRACTIONAL AND METRIC SIZES

r

Diameter of Drill

T

D Frac.

mm 25.50 26.00

1'I' 6 28.00 1'Is 30.00 131' 6 1'lu 32.00 15/16

34.00 I3 1 ~

36.00 11'1 6 38.00 1'12 191'6 40.00 1518 42.00 1v16 44.00 1 46.00 1131~6

1J18 48.00 115116 50.00 2

t

Flute Length

F

f

Overall Length L

Decimal Inch Equivalent

Millimeter Equivalent

Inch

mm

Inch

mm

1.0039 1.0236 1.0625 1.1024 1.1 250

25.500 26.000 26.988 28.000 28.575

4 4 4 4 4

102 102 102 102 102

6% 6'14 61 '4 6% 6%

1.1811 1.1875 1.2500 1.2598 1.3125

30.000 30.162 31.750 32.000 33.338

4% 4% 4318 4% 4%

108 108 111 111 111

1.3386 1.3750 1.4173 1.4375 1.4961

34.000 34.925 36.000 36.5 12 38.000

41 '2 4% 4314 4% 47h

1.5000 1.5625 1.5748 1.6250 1.6535

38.1O0 39.688 40.000 41.275 42.000

1.6875 1.7323 1.7500 1.8110 1.8125 1.8750 1.8898 1.9375 1.9685 2.0000

f

A

Decimal Inch

mm

159 1 59 159 1 62 162

0.9843 0.9843 1.o000 0.9843 1.o000

25.00 25.00 25.40 25.00 25.40

61' s 6% 63/4 7 7

168 168 171 178 178

0.9843 1.o000 1.o000 1.2402 1.2500

25.00 25.40 25.40 31.50 31.75

114 114 121 121 124

7 '18 71 '6 7% 7318 7 'h

181 181 1 87 187 I90

1.2402 1.2500 1.2402 1.2500 1.2402

31.50 31.75 31.50 31.75 31.50

41' s 4% 41's 47/s 5'18

124 124 124 124 130

7 'h 7% 7% 73/4 8

190 197 197 197 203

1.2500 1.5000 1.4961 1.5000 1.4961

31.75 38.1 O 38.00 38.1O 38.00

42.862 44.000 44.450 46.000 46.038

51 '8 5'h 5'18 5318 531s

130 130 130 137 137

8 8 8 81 '4 8 'lu

203 203 203 210 210

1.5000 1.4961 1.5000 1.4961 1.5000

38.1O 38.00 38.1 O 38.00 38.1 O

47.625 48.000 49.21 2 50.000 50.800

53/8

137 143 1 43 143 1 43

8'14 8 8% 8% 81 '2

210 216 216 216 216

1.5000 1.4961 1.5000 1.4961 1.5000

38.1 O 38.00 38.1 O 38.00 38.1O

ki5/s

55/s 5518 5518

33 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Shank Diameter

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TWIST DRILLS

ASME 894.11M-1993

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

TABLE 4

GENERAL DIMENSIONS OF TANGS FOR STRAIGHT SHANK DRILLS'

Ft

Nominal Diameter of Drill Shank

A Inches l/8

Over Over Over Over

'14 Y16

Over '732 Over %6 Over 21/32 Over 3/4 Over S /'

Millimeters

through through through through through

%6

3/8

l%2

Over 1 through 13/16 Over 1 3 h through 13h

Millimeters

Inches Max.

Min.

Max.

Min.

Tt

Length of Tang

K Inches

4.76 6.35 7.94 9.53 11.91

0.094 0.1 22 0.1 62 0.203 0.243

0.090 0.1 18 0.1 58 0.1 99 0.239

2.39 3.10 4.1 1 5.16 6.17

2.29 3.00 4.01 5.06 6.07

7.0 8.0 8.5 9.5 11.0

11.91 14.29 16.67 19.05 Over.22.23

through through through through through

14.29 16.67 19.05 22.23 25.40

0.303 0.373 0.51 4 0.609

0.297 0.367 0.437 0.508 0.601

7.70 9.47 11.25 13.05 15.47

7.55 9.32 11.10 12.90 15.27

12.5 14.5 16.0 17.5 19.0

0.700 0.81 7

0.692 0.809

17.78 20.75

17.58 20.55

20.5 22.0

Over 25.40 through 30.16 Over 30.16 through 34.93

0.443

NOTE: (1)Tofit split sleeve collet type drill drivers, see ANSI 894.35

Concentricity of Tang Thickness of Tana (TI ~~~~~~

Inches From 0.090 through 0.243 Over 0.243 through 0.443 Over 0.443through 0.609 Over 0.609 through 0.817

I

Millimeters From 2.29 through 6.17 Over 6.17 through 11.25 Over 11.25 through 15.47 Over 15.47 through 20.75

I

Total Indicator Variation

I

Inches

0.006 0.007 0.008 0.009

TT.I.V.P

I

Millimeters

0.16 0.1 8 0.2 1 0.23

NOTE: (1)Method of measurement: Place shank of drill in V-block, level the tang surface. Set the tip of the dial indicator on the tang and set the indicator to zero. Rotate the drill 180 deg.and note the indicator reading.

34

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Millimeters

through through through through through

Over Over Over Over

through through *'/Jz through 3/4 through 718 through 1

J

3.18 4.76 6.35 7.94 9.53

Over Over Over Over

'14

Thickness of Tana

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ASME B 7 4 = L L M 73 m 0757670 0540670 811 m

TWIST DRILLS

\

ASME 894.11M-1993

I 1

f

f-

a

TABLE 5

Fraction

Millimeters 3.00 3.20 3.50

3.80 4.00 4.20

4.50 4.80 5.00

5.20 5.50

O

5.80

6.00 6.20 6.50

6.80 7.00 7.20 7.50

See Table

tolerances 10 for drill

GENERAL DIMENSIONS OFTAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES

r

Diam, er of Drill

D

a

Taper shank dimensions and tolerances in accordance with American National Standard 85.10, Machine Tapers.

i

Regular Shank (Note 1) Morse Taper Number

Flute Length

I

Millimeter Equivalent

A

Inch

Millimeters

0.1 181 0.1250 0.1 260 O. 1378 O. 1406

3.000 3.175 3.200 3.500 3.571

1 1 1 1 1

1JI8 1JI8 2118 2'/8 21 '8

48 48 54 54 54

130 130 137 137 137

O. 1496 O. 1 562 O. 1 575 O. 1654 0.1719

3.800 3.967 4.000 4.200 4.366

1 1 1 1 1

2110 2'I0 21 '2 2112 2'12

54 54 64 64 64

137 137 146 146 146

0.1772 0.1875 0.1 890 0.1 969 0.2031

4.500 4.762 4.800 5.000 5.1 59

1 1 1 1 1

21 '2 21 '2 23/s 231~ 23/n

64 64 70 70 70

146 1 46 152 152 152

0.2047 0.21 65 0.2 188 0.2283 0.2344

5.200 5.500 5.558 5.800 5.954

1 1 1 1 1

2% 2% 2% 2718 2718

70 70 70 73 73

152 152 152 156 156

0.2362 0.2441 0.2500 0.2559 0.2656

6.000 6.200 6.350 6.500 6.746

1 1 1 1 1

2% 2% 2JI8 3 3

73 73 73 76 76

156 156 156 159 159

0.2677 0.2756 0.281 2 0.2835 0.2953

6.800 7.000 7.142 7.200 7.500

1 1 1 1 1

3 3 3 3% 31 '8

76 76 76 79 79

1 59 1 59 159 1 62 162

F

NOTE: (1) No shanks smaller or larger than regular are used for these sizes.

35 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Overall Length

Decimal Inch Equivalent

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

L Millimeters

ASME B94.11M-1993

TABLE 5

GENERAL DIMENSIONS OF TAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT'D)

T

Diarr ter of Drill

D

'i

Decimal Inch Equivalent

Millimeter Equivalent

0.2969 0.3071 0.31 25 0.31 50 0.3228

Reaular Shank Morse Taper Number

Flute Length

F

I

Overall Length

L

A

Millimeters

Inch

Millimeters

7.541 7.800 7.938 8.000 8.200

1 1 1 1 1

79 79 79 83 83

6318 6318 6310 6 '12 6%

162 162 162 165 165

0.3281 0.3346 0.3438 0.3465 0.3543

8.334 8.500 8.733 8.800 9.000

1 1 1 1 1

83 83 83 89 89

6% 61 '2 6% 63/4 6%

165 165 165 171 171

0.3594 0.3622 0.3740 0.3750 0.3858

9.129 9.200 9.500 9.525 9.800

1 1 1 1 1

89 89 89 89 92

63/s 6314 6314 61' 4 7

171 171 171 171 178

0.3906 0.3937 0.401 6 0.4063 0.41 34

9.921 10.000 10.200 10.319 10.500

1 1 1 1 1

92 92 92 92 98

7 7 7 7 71'4

178 178 178 178 184

0.42 19 0.4252 0.433 1 0.4375 0.4409

10.71 6 10.800 11.000 11.112 11.200

1 1 1 1 1

98 98 98 98 105

7% 71'4 71' 4 71'4 7'h

184 184 184 184 190

12.00

0.4528 0.4531 0.4646 0.4688 0.4724

1 1.500 1 1.509 11.800 11.908 12.000

1 1 1 1 2

105 105 105 105 111

7'h 7'h 7'12 7'12 8lI4

190 190 190 190 210

12.20

0.4803 0.492 1 0.5000 0.5039

12.200 12.304 12.500 12.700 12.800

2 2 2 2 2

111 111 111 111 117

8lI4 8V4 8V4 8V4 8'k

210 210 210 210 216

0.51 18 0.51 56 0.5197 0.5312 0.5315

13.000 13.096 13.200 13.492 13.500

2 2 2 2 2

117 117 117 117 117

8% 8% 8% 8 'h 8%

216 216 216 216 216

Millimeters 7.80 8.00 8.20

8.50 8.80 9.00

9.20 9.50 9.80

10.00 10.20 10.50

10.80 11.00 11.20 11.50 11.80

0.4844 12.50 12.80 13.00 13.20 13.50

36 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

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I

ASME B94.LLM

93

0759b70 0540692 694

TWIST DRILLS

ASME B94.11M-1993

TABLE 5

GENERAL DIMENSIONS OF TAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT'D) T

A

... ... ...

... ...

F

~~

Flute Length

F

t

Morse Taper Number

Overall Length

L

Inch

Millimeters

Inch

Millimeters

...

... ...

... ...

...

... ...

...

... ...

...

...

... ... ...

... ... ...

...

...

...

...

... ... ... ...

A

... ...

... ... ... .*. ...

... ...

... ...

...

...

I Flute Length

F

Inch

Millimeters

... ... ... ...

... ... ...

...

...

...

... ... ...

...

...

... ... ... ...

... ... ... ...

...

...

...

...

... ...

...

... ...

... ...

...

... ... ... ... ...

... ... ... ...

...

... ... ... ...

... ...

...

...

2

...

...

...

2

...

... ... ...

3518

...

...

...

...

... ...

...

... ...

... ...

...

... ...

...

... ... ...

... ...

... ...

...

,.. ...

...

...

...

...

... ...

... ...

1

4%

1 1 1 1 1

4% 4% 4%

1 1 1 1 1

4518

4% 4%

4% 4% 4% 4%

...

... ... ... ...

... ...

...

... ... ...

...

...

... ... ...

3 '12

89

7%

187

92

7'12

190

92

... 7'h

190

98

7%

197

...

... ...

3%

98

7%

197

2

3518

...

...

... ...

*.. ... ... ... ...

2

31'8

...

...

111

73/4

197

111 111 111 111 117

7% 7% 7% 7% 8

197 197 197 197 203

117 117 117 117 117

8 8 8 8 8

203 203 203 203 2 03

... ...

...

...

...

... ...

2

...

...

...

... ...

... ... ...

...

...

... ...

...

... ...

...

...

... ...

...

#..

... ...

...

...

...

...

...

2

4%

105

...

8

...

203

2

4'18

105

...

8

...

203

...

... ... ... ...

...

... ... ...

... ... ... ...

...

...

... ...

...

... .,. ...

... ...

... ... ... ...

...

...

...

... ... ...

... ...

... ...

37

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

...

...

...

...

...

... ...

... ... ...

... ...

...

...

... ... ... ... ...

...

...

... ... ...

...

...

...

...

... ... ...

...

... ... ... ...

...

...

L

Millimeters

...

...

Overall Length

...

...

...

t

Inch

...

...

...

c

Shank Larger Than Regular

T

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... ...

... ... ...

... ...

... ...

... ... ...

...

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Morse laper Number

Shank Smaller Than Reaular

ASME B 9 4 . 1 1 M

93

m

0759b70 0 5 4 0 6 9 3 520

ASME B94.11M-1993

TWIST

TABLE 5

GENERAL DIMENSIONS OF TAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES KONT'D)

T

Diameter of Drill

r

D Fraction

Millimeters 13.80

35104

14.00 14.25 1'1 6 14.50 37/64 14.75 15.00 "/32

15.25 39/84

15.50 15.75 518

16.00 16.25 4'/64 16.50 "132

16.75 17.00 43/04

17.25 lll~s

17.50 45/64 18.00 23/32 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

18.50 "164 19.00 314 09/64

19.50

'

5/32

20.00 5'184

'

20.50 3/1 6

Decimal Inch Equivalent

Millimeter Equivalent

0.5433 0.5469 0.5512 0.561O 0.5625

Flute length

F

F

Overall Length

L Inch

Millimeters

A

Inch

Millimeters

13.800 13.891 14.000 14.250 14.288

2 2 2 2 2

4% 47h 41'8 4718 4%

124 124 124 124 124

8314 83/4 83/4 83/4 83/4

222 222 222 222 222

0.5709 0.5781 0.5807 0.5906 0.5938

14.500 14.684 14.750 15.000 15.083

2 2 2 2 2

41'8 4718 4718 4% 4%

124 124 124 124 124

8314 8314 8V4 83/4

222 222 222 222 222

0.6004 0.6094 0.61 02 0.6201 0.6250

15.250 15.479 15.500 15.750 15.81 5

2 2 2 2 2

4718

4718 4% 41'8 4718

124 124 124 124 124

83/4 8Y4 8Y4 83/4 8314

222 222 222 222 222

0.6299 0.6398 0.6406 0.6496 0.6562

16.000 16.250 16.271 16.500 16.667

2 2 2 2 2

51 '8 51 '8 5'18 51 '8 5%

130 130 130 130 130

9 9 9 9 9

229 229 229 229 229

0.6594 0.6693 0.671 9 0.6791 0.6875

16.750 17.000 17.066 17.250 17.462

2 2 2 2 2

5318 5318 5318 5318 5318

137 137 137 137 137

9'14 91 '4 91'4 91 '4 9 'I4

235 235 235 235 235

0.6880 0.7031 0.7087 0.71 88 0.7283

17.500 17.859 18.000 18.258 18.500

2 2 2 2 2

5% 551a 5% 5% 5718

143 143 143 143 149

9% 9% 9112 9112 9314

241 241 241 241 248

0.7344 0.7480 0.7500 0.7656 0.7677

18.654 19.000 19.050 19.446 19.500

2 2 2 2 2

5718 5% 5% 6 6

1 49 1 49 149 152 152

g3/4 9% 9314 9718 9%

248 248 248 251 251

0.781 2 0.7874 0.7969 0.8071 0.81 25

19.843 20.000 20.241 20.500 20.638

2 3 3 3 3

6 6 '18 6% 61 '8 61 '8

152 156 156 156 1 56

9718

103/4 103/4 103/4 103/4

251 273 273 273 273

2331~

38

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

r

ReQular Shank Morse Taper Number

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

DRILLS

1

ASME B 7 4 - L L M 73

m 0757670 0540694 467 m

TWIST DRILLS

ASME B94.11M-1993

TABLE 5

Morse Taper Number

F

GENERAL DIMENSIONS OF TAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT'D)

I"--+

Shank Smaller Than Regular Flute Length

F

Overall Length

L

...

... ... ...

... ... ...

... ...

... ...

... ...

... ... ... ...

...

...

...

...

...

... ...

... ...

...

...

... ... ...

...

...

...

... ...

... ...

... ...

... ... ... ... ...

... ... ...

... ... ...

...

...

... ...

... ... ... ... ...

... ... ... ... ...

... ... ...

...

... ... ... ... ...

... ... ...

*,.

...

...

...

...

...

... ...

... ...

...

... ...

... ... ... ... ... ... ... ... ...

... ... ...

... ...

...

... .

.

... ...

... ...

... ... ... ... ...

... ... ... ... ... ...

... ... ... ...

...

...

... ... ...

.*. ...

.

f

.

... ... ... ... ...

...

...

.,. ...

...

L

... ...

210 21 o 21 o 21 o 21 o

4'1s

F Millimeters

8114 8'14 8l14 8'14

4% 4%

...

...

...

...

Inch

...

Millimeters

... ...

... ... ...

...

...

...

... ... ... ..* ...

... ...

... ...

...

...

3

5'18

130

...

93/4

...

248

3

5'18

130

9%

248

...

...

...

... ... ... f

.

.

...

...

.,.

...

...

... ...

... ... ... ...

... ... ... ... ...

... ...

... ...

...

...

...

...

...

...

...

...

...

...

... ...

3

5%

137

10

254

3

5%

137

10

254

... ... ... ...

... ... ...

...

...

...

...

...

...

...

...

3

5%

1 0'14

260

...

...

143

...

...

...

... ...

... ...

3

5%

10%

260

...

...

143

...

...

... ... ... ...

3

149

10'12

267

...

...

149 152

1 O'k

...

I 051~ ...

267 270

...

5% ... 5% 6 ...

3

6

152

I051~

...

...

... ...

...

... ...

... ... ... ...

... ...

f

.

.

... f

.

.

...

...

...

...

... 3 3

...

...

...

...

...

...

2 2 2 2

6% 6'1s 6'1s 6'h

156 156 156 156

10 10 10 10

254 254 254 254

... ...

...

...

...

...

...

...

...

...

... ...

39 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Overall Length

Inch

8'14

4%

Flute Length

!gular

A

124 124 124 124 124

f

4 ' 1 s

i

Millimeters

1 1 1 1 1

Millimeters

Morse Taper Number

Inch

A

Inch

Shank Larger Than

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

...

...

... ... ...

...

...

...

...

270

... ...

... ...

0759b70 0 5 4 0 b 9 5 3 T 3 D

ASME B 9 4 - L L M 93

ASME

TWIST DRILLS

M-1993

O TABLE 5

GENERAL DIMENSIONS OFTAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT'D)

T

Diameter of Drill

D Millimeters 21 .o0 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

21.50

22.00 22.50 23.00

23.50 24.00

24.50 25.00

25.50 26.00

26.50

27.00

27.50 28.00 28.50

29.00 29.50

Decimal Inch Equivalent

Millimeter Equivalent

0.8268 0.8281 0.8438 0.8465 0.8594

T

Reaular Shank Morse Taper Number

Flute Length

F

5

Overall Length

Inch

Millimeters

21.o00 21 .O34 21.433 21.500 21.829

3 3 3 3 3

6% 6% 6% 6% 6'8

156 156 156 156 156

273 273 273 273 273

0.8661 0.8750 0.8858 0.8906 0.9055

22.000 22.225 22.500 22.621 23.000

3 3 3 3 3

6% 6% 6% 6'1s 6%

156 156 156 156 156

273 273 273 273 273

0.9062 0.921 9 0.9252 0.9375 0.9449

23.01 7 23.41 6 23.500 23.862 24.000

3 3 3 3 3

6% 6% 6% 6% 63k

156 156 156 156 162

273 273 273 273 279

0.9531 0.9646 0.9688 0.9843 0.9844

24.209 24.500 24.608 25.000 25.004

3 3 3 3 3

6% 63k 6% 6% 63/8

162 162 162 162 162

279 279 279 279 279

1.o000 1.0039 1.O1 56 1.O236 1.O312

25.400 25.500 25.796 26.000 26.1 92

3 3 3 3 3

6% 6V2 61 '2 61 '2 6'k

162 165 165 165 165

279 283 283 283 283

1.O433 1.o469 1.O625 1.O630 1.0781

26.500 26.591 26.988 27.000 27.384

3 3 3 3 4

6% 65k 6% 6% 6%

168 168 168 168 175

286 286 286 286 318

1.O827 1.O938 1.1024 1.1094 1.1220

27.500 27.783 28.000 28.179 28.500

4 4 4 4 4

67k 671s 7 118 7% 7%

175 175 181 181 181

318 318 324 324 324

1.1250 1.1406 1.1417 1.1 562 1.1614

28.575 28.971 29.000 29.367 29.500

4 4 4 4 4

71 '8 7% 7114 7114 73h

181 184 184 184 187

324 327 327 327 330

40

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

1

A

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

Millimeters

O

a

a

ASME B94-LlM 93

0759670 0540696 2 3 T

TWIST DRILLS

694.1

TABLE 5

T Morse Taper Number

A

F

T

Shank Smaller Than Regular

r " t

Flute Length

L

Millimeters

2 2 2 2 2

61 '8 6% 6% 6 lls 61' s

156 156 156 156 156

10 10 10 10 10

254 254 254 254 254

2 2 2 2 2

61' s 6% 6% 6% 6%

156 156 156 156 156

10 10 10 10 10

254 254 254 254 254

2

6%

156

10

254

...

... ... ...

... ... ...

... ... ...

... ... ...

... ...

... ...

... ...

...

... ...

... ... ... ...

...

... ... ...

...

...

...

... ... ...

...

*..

...

Inch

... ... ...

... ... ... ... ...

... ...

...

...

... ... ...

... ... ... ...

...

...

... ... ... ...

... ...

... ... ... ... ...

...

...

...

... ... ... ... ...

4

6%

162

12

305

...

... ...

... ...

...

...

... ...

...

... ...

...

...

...

.,. ...

...

... ...

... ...

... ...

...

...

...

...

...

...

... ... ... ...

...

165

1 2118

308

...

...

...

...

... ...

... ...

168

121'4

31 1

... ... ...

... ... ... ... ...

... ... ... ... ...

...

...

6718

175

11112

292

3 ,3 3 3 3

6718 6% 7% 7% 7%

175 175 181 181 181

11112 1 1112 113/4 113/4 113/4

292 292 298 298 298

3 3 3 3 3

7% 7% 71'4 71'4 7%

181 184 184 184 187

113/4 11718 117 8 11'I8 12

298 302 302 302 305

...

...

4

6518

...

...

...

...

... ...

... ...

...

... ...

... ...

...

...

...

... ...

... ... ...

... ... ...

...

...

...

.

.

f

f

.

.

...

...

41 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

... ... ... ...

... ...

6

3

.

...

...

... ...

...

...

4

...

.

...

...

... ... ...

.

... ...

...

...

f

...

... ...

...

... ...

.

... ... ...

...

...

.

... ...

Millimeters

...

f

...

...

f

Inch

... ... ... ... ... ... ...

...

Millimeters

...

.

...

L

Inch

...

...

... ...

Overall Length

F

... ... ...

...

...

Flute Length

!gular

... ...

... ... ... ...

F

Shank Larger Than

...

...

... ... ... ...

...

...

A

lllillimeters

... ... ... ...

... ...

Morse Taper Number

Overall Length

F

... ...

1M-1993

GENERAL DIMENSIONS OFTAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT'D)

Inch

... ... ... ...

ASME

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

... ...

... ... ...

...

... ...

... ... ... ...

~~

A S I E B94.11M 9 3

m 0759670 0540697 176 m

TWIST DRILLS

ASME B94.11M-1993

TABLE 5

GENERAL DIMENSIONS OF TAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT’D)

l-

Diameter of Drill

D Millimeters

30.00 30.50

31.00 31.50

32.00 32.50

33.00 33.50 34.00

34.50

35.00 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

35.50 36.00

36.50

37.00

37.50

Decimal Inch Equivalent

Millimeter Equivalent

1.1719 1.1811 1.1875 1.2008 1.2031

Morse Taper Number

Flute Length

Overall Length

F

L

A

Inch

Millimeters

Inch

Millimeters

29.766 30.000 30.1 62 30.500 30.559

4 4 4 4 4

731a 731a 7Ya 7 112 7%

187 187 187 190 190

13 13 13 13’18 13%

330 330 330 333

1.2188 1.2205 1.2344 1.2402 1.2500

30.958 31.000 31.354 31.500 31.750

4 4 4 4 4

7 l/2 7’Ia 7’Ia 7’Ia 7’la

190 200 200 200 200

13’18 13% 13’k 13% 13%

333 343 343 343 343

1.2598 1.2656 1.2795 1.2812 1.2969

32.000 32.146 32.500 32.542 32.941

4 4 4 4 4

8% 8% 8% 8% 851a

21 6 216 216 21 6 21 9

14’18 14’18 14’18 14’18 14%

359 359 359 359 362

1.2992 1.3125 1.3189 1.3281 1.3386

33.000 33.338 33.500 33.734 34.000

4 4 4 4 4

87a 851a 83/4

8j/4

21 9 21 9 222 222 222

14% 14% 143/a 143/a 143/a

362 362 365 365 365

1.3438 1.3583 1.3594 1.3750 1.3780

34.1 33 34.500 34.529 34.925 35.000

4 4 4 4 4

83/4 8’h3 8’Ia 8’ta 9

222 225 225 225 229

143h 14’k 14’k 14’h 145h3

365 368 368 368 37 1

1.3906 1.3976 1.N62 1.4173 1.4219

35.321 35.500 35.717 36.000 36.116

4 4 4 4 4

9 9 9 91/0 9%

229 229 229 232 232

14% 145h3 145h3 143/4 143/4

37 1 37 1 371 375 375

1m 7 0 1.4375 1.4531 1.4567 1.4688

36.500 36.512 36.909 37.000 37.308

4 4 4 4 4

9% 9’18 9% 9% 9%

232 232 235 235 235

14% 14314 14% 14% 14’Ia

375 375 378 378 378

1.4764

37.500 37.704 38.000 38.1 O0 38.496

4 4

g3/a 9% g3/a g3/s

238 238 238 238

15 15 15 15

381 381 381 381

1.M44

38.00

Reoular Shank

1.4961 1.5000 1.5156

4

4

...

83/4

...

...

..*

42

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

333

...

ASME B 9 4 - L L N 93

m 0759670 0540698 002 m

TWIST DRILLS

ASME 894.11 M-I993

O TABLE 5

GENERAL DIMENSIONS OF TAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT’D)

Shank Smaller Than Regular Morse Taper Number

A

”-7

t

Flute Length

Overall Lenath

F

L

Inch

Millimeters

Inch

Millimeter!

3 3 3 3 3

7Ya 7318 7318 7112 7112

187 187 187 190 190

12 12 12 12118 12118

305 305 305 308 308

3 3 3 3 3

7’12 7% 7’18 7718 7’10

190 200 200 200 200

1 2110 1 2‘12 12’12 12’/2 1 2’12

308 318 318 318 31 8

...

... ... ... ... ...

...

... ...

...

... ... ...

...

...

...

...

... ... ... ... ... ...

... ... ... --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

... ... ...

...

... ... ...

... ... ... ...

... ... ... ... ... ... ... ... ... ...

...

... ...

... ...

...

...

...

.

f

.

...

... ... ... f

.

.

...

...

...

...

...

...

... ... ...

... ...

... ...

... ...

...

... ...

4

9318

...

... ... ... ...

.,.

... ...

... ... ...

...

...

...

...

...

... ...

...

...

... ... ... ... ...

... ...

... ...

... ...

...

... ...

... ...

... ... ...

...

... ...

...

... ...

...

...

,.. ...

...

... ... ...

...

...

238

15

381

...

...

... ...

.. ...

.

... ... ...

...

...

f

... ...

...

... ...

.

...

... ...

Millimeters

... ...

...

...

... ... ...

...

...

... ...

...

...

... ...

...

F Inch

...

...

Flute Length

A

... ... ...

...

... ... ... ...

... ... ...

... ... ... ...

...

... ...

i

Shank Larger Than Morse Taper Number

... ...

...

... ...

... ... ...

...

... ... ... ... ...

... ... ...

... ...

...

Overall Lenath L

Inch

...

Millimeters

...

... ... ... ... .

f

.

...

... ...

... ...

... ... ... ... ...

...

...

...

...

... ... ... ... ...

...

... ...

... ...

... ...

... *.. ... ... ...

...

...

... ... ...

...

... ... ... ...

... ... ... ... ...

... ...

...

...

... ... ... ... ...

...

...

...

... ...

... .

f

.

... ... ...

...

... ...

... ...

... ... ...

...

...

... ... ...

...

... ...

... ...

...

... ...

...

...

...

... ...

...

... ...

43

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

egular

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

...

...

...

... ... ...

... ... ..

.. ...

~~

ASME B 9 4 - L L M 93

ASME

0759670 0540697 T 4 9

TWIST DRILLS

1M-1993

TABLE 5

GENERAL DIMENSIONS OFTAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT’D) c

Regular Shank

Diam :er of Drill ~~

D Millimeters 39.00

40.00

41.O0

42.00

43.00

44.00

45.00 46.00

47.00

48.00

49.00 50.00

51.00 52.00 53.00

Morse Taper Number

Flute Length

F

Overall Length

Decimal Inch Equivalent

Millimeter Equivalent

1.5312 1.5354 1.5469 1.5625 1.5748

38.892 39.000 39.291 39.688 40.000

1.5781 1.5938 1.6094 1.61 42 1.6250

40.084 40.483 40.879 41 .O00 41.275

1.6406 1.6535 1.6562 1.671 9 1.6875

41.671 42.000 42.067 42.466 42.862

1.6929 1.7031 1.7188 1.7323 1.7344

43.000 43.259 43.658 44.000 44.054

...

1.7500 1.771 7 1.781 2 1.8110 1.81 25

44.450 45.000 45.242 46.000 46.038

5 5 5 5 5

1O’h 1O’L 10% 10% 1 0%

257 257 2 57 2 57 257

17% 17% 17% 17% 17’Is

435 435 435 435 435

1.8438 1B504 1.8750 1.8898 1.9062

46.833 47.000 47.625 48.417

5 5 5 5 5

10% 10% 1031~ 1031~ I031~

2 57 264 264 264 264

17 ’/a 17Y8 17% 173/8 1731a

435 441 441 441 441

1.9291 1.9375 1.9685 1.9688 2.0000

49.000 49.21 2 50.000 50.008 50.800

5 5 5 5 5

103h I03h I0 3 ~ I 03h 1031~

264 264 264 264 264

17318 17jh 173h 173h 173h

441 441 441 441 441

2.0079 2.0312 2.0472 2.0625 2.0866

51.O00 51.592 52.000 52.388 53.000

5 5 5 5 5

I031~

264 264 260 260 260

17318

1031~ 10% 10% 10%

441 441 441 441 441

48.000

F

L

A

Inch

Millimeters

5 5

...

93h 95h

...

5 5

95h 9%

...

...

...

...

...

5

9%

251

1671a

429

254 254

17 17

432 432

...

... 10 10

5 5

Inch

Millimeters

238 244

16310 16%

41 6 422

244 251

16% 1 6%

422 429

...

...

...

...

...

...

...

...

...

...

5 5

101h 10%

257 257

17% 17%

435 435

5

10%

257

17%

435

5

1O’I8

257

17’1s

435

5 5

10% 10’1s

2 57 257

17’h 171/e

435 435

... ...

...

... ...

...

... ...

...

...

...

1731a

17% 1731a 173/8

44 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

...

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

...

...

f

.

.

ASME B94-lLM 93 H 0 7 5 9 b 7 0 0540700 590

m

TWIST DRILLS

ASME B94.11 M-I 993

TABLE 5

.

c F f .

Morse Taper Number

I

Shank Smaller Than Regular

~

Flute Length

F

Overall Length

L

c

Inch

Millimeters

1

Inch

Hillimeters

15 15’14 15’14 15114 15’k

38I 387 387 387 394

25 1 25 1 254 254 254

15’k 1 5’12 15518 1S5/a 15518

394 394 397 397 397

1D’/a 10’18 1o ’I8 1o ’IS

2 57 257 2 57 2 57 257

15314 153/4 15314 15314 15314

400 400 400 400 400

10% 10’18 10118 I031~ I 031~

257 257 257 264 264

15314 15314 15% 16’14 16’14

1031~ I 031~ I 031~ I 031~ I 031~

264 264 264 264 264

4 4

I 031~ 10112 1O’h 10’12 10’12

4 4 4 4 4

A .

.

GENERAL DIMENSIONS OF TAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT’D)

. . . .

4 4 4 4 4

9318 g5/a 9518 9518 9%

238 244 244 244 251

4 4 4 4 4

g7/8 9718 10 10 10

4 4 4 4 4

10118

4

Morse Taper Number

Shank Larger Than Regular

I Flute Length Overall Length

A

Inch

Millimeters

Inch

Millimeters

... ... ... ...

... ...

...

... ...

... ... ... ... ...

...

...

... ... ... ...

... ... ... ...

...

... ... ...

...

... ...

...

...

... ...

...

...

...

...

... ...

...

...

... ... ...

... ... ... ... ...

... ... ... ...

... ... ... ... ...

... ... ... ... ...

... ...

... ...

...

... ... ... ...

41 3 41 9 419 41 9 41 9

105h I 051~ 1051~ 1051~ 1051~

270 270 270 270 270

16% 16518 16% 16% 16%

422 422 422 42 2 42 2

...

...

...

... ...

...

... ... ...

... ... ...

...

...

... ...

...

...

... ... ...

...

...

...

... ... ... ...

...

... ... ... ...

...

... ...

... ...

... ... ... ... ... ...

...

... ...

...

...

...

...

...

... . I .

...

... ... ... ...

...

...

... ... .

f

.

... ... ...

...

45 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

...

...

16 ’I4 16’h 16V2 16% 3 6‘12

.

...

...

264 267 267 267 267

... ...

... ...

...

...

... ... ... ... ...

4

...

...

41 3 41 3 41 3 41 3 413

...

...

...

... ... ...

...

16’14 16’14 16’14 16’14 16’/4

...

...

... ... ...

...

4 4

...

...

... ...

4

... ... ... ...

...

... ...

...

...

.

... ...

... ...

.

... ...

...

400 400 400 41 3 41 3

...

f

...

... ... ... ...

...

4 4 4 4

L

...

. .

... ... ... ...

4 4 4 4

t

F

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

... ... ...

... ... ... ...

...

... ... ...

...

...

...

... ... ...

...

... ...

ASME B94.LLM

0759670 0540703 427

93

TWIST DRILLS

ASME 894.11M-1993

TABLE 5

GENERAL DIMENSIONS OF TAPER SHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT'D)

T

Diameter of Drill

r

D Fraction

Millimeters

54.00 55.00

56.00 57.00

58.00 59.00 60.00

61.O0

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

62.00 63.00

64.00 65.00 66.00

67.00 68.00 69.00

70.00 71.O0 72.00 73.00

74.00 75.00 76.00

Decimal Inch Equivalent

Millimeter Equivalent

2.0938 2.1 250 2.1 260 2.1 562 2.1 654

53.1 83 53.975 54.000 54.767 55.000

2.1875 2.2000 2.2188 2.2441 2.2500

Morse Taper Number

F

Regular Shank (Na

!

II _ _ Overall Length

Flute Lenath

L

F

Millimeters

Inch

Millimeters

5 5 5 5 5

260 260 260 260 260

17% 17318 17% 17318 17318

441 441 441 441 441

55.512 56.000 56.358 57.000 57.1 50

5 5 5 5 5

260 257 257 257 257

17318 17318 17318 173/a 17318

441 441 441 441 441

2.2835 2.3125 2.3228 2.3622 2.3750

58.000 58.738 59.000 60.000 60.325

5 5 5 5 5

257 257 257 2 57 2 57

173/s I73/s 17% 1 73L 17318

441 441 441 441 441

2.401 6 2.4375 2.4409 2.4803 2.5000

61.000 61.912 62.000 63.000 63.500

5 5 5 5 5

286 286 286 286 286

183/4 18% 18% 18% 1874

476 476 476 476 476

2.5197 2.5591 2.5625 2.5984 2.6250

64.000 65.000 65.088 66.000 66.675

5 5 5 5 5

302 302 302 302 302

19% 19'12 19% 19% 19'1~

495 495 495 495 495

2.6378 2.6772 2.6875 2.7165 2.7500

67.000 68.000 68.262 69.000 69.850

5 5 5 5 5

324 324 324 324 324

2031~ 2031~ 2031~ 2031~ 203~

51 8 51 8 51 8 51 8 518

2.7559 2.7953 2.8125 2.8346 2.8740

70.000 71.O00 71.438 72.000 73.000

5 5 5 5 5

340 340 340 340 340

21% 21'L 21% 21% 21%

537 537 537 537 537

2.8750 2.9134 2.9375 2.9528 2.9921

73.025 74.000 74.61 2 75.000 76.000

5 5 5 5 5

340 356 356 356 356

21% 2 3/4 1 2 31 14 2 3114 2 3114

537 552 552 552 552

NOTE: (1)No shanks smaller or larger than regular are used for these

A

Sim.

46

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

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ASME B 9 4 - L L M 93

0759670 0540702 363

TWIST DRILLS

ASME 894.11M-1993

TABLE 5

GENERAL DIMENSIONS OF TAPERSHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT'D) Resular Shank

Diameter of Drill

D Millimeters

Fraction

Morse Taper

Decimal Inch Equivalent

Equivalent

3.0000 3.031 5 3.0709 3.1 250 2.2500

76.200 77.000 78.000 79.375 82.550

I

77.00 78.00

3.5000

L

TABLE 5

i

88.900

L

Inch

I

L

I

Millimeters 356 371 37 1 37 1 394

14% 14518 147'8 1 51'2

...

1

...

Inch

3.0000 3.0315 3.0709 3.1 250 2.2500 3.5000

Millimeters 552 622 622 622 648

1

I

Shank Smaller Than Regular Morse Taper

Flute Length

Overall Length

F

L

Millimeters

Inch

76.200 77.000 78.000 79.375 82.550

...

...

...

5 5 5 5

362 362 362 387

22 22 22 22

559 559 559 584

88.900

5

41 3

24

610.

Inch

i

I

...

I

47 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

1

GENERAL DIMENSIONS OF TAPERSHANK TWIST DRILLS FRACTIONAL AND METRIC SIZES (CONT'D)

Decimal Inch Equivalent 77.00 78.00

Overall Length

F

t 14

Diameter of Drill

D

Flute Length

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

~

Millimeters

~~~

ASME B 9 4 - 1 1 M 9 3 M 0759670 0540703 2 T T M

TWIST DRILLS

ASME 894.1 1 M-1993

m

3 deg. - 8 deg.

"

R

(1) Dress notching wheelto 110 deg. angle, plus or minus 5 deg. (2) Shading represents areas ground during split pointing. I

A

+ 10 - 0

I

- /'

TABLE 6 A=118deg. Range '/16-#41

Over ~~~

20 deg.*3 deg.

I

'/8-l/4

~~

~

.

Over l/4-l/2

Over 3/4-1 ~

I

SPLIT POINT DRILL GRINDING

E A=135 deg. Lip Lip Relief Lip Relief Height

17 d e ~ . * 2den.

#40-'/8 14 deq.+2 den.

I dea.+2 14

dea.

dea.

W* Web After Notching .002/.005

.O02T.I.V.

16 deg.*3 deg.

dea.*2 14

.O02T.I.V.

I

.002/.005

G Cutting Edges

.O05

.o02

.O07

.002/.005

I

.O02 T.I.V.

R Max. Rad. in Notch

I

.O10

C Chisel Edge Align. of Sec. Centrality .o02

.O03

I

.O03

.o02

I

.O02

12 deg.k2 deg.

.O02 T.I.V.

.002/.009

.O1 5

.O04

.O04

10 deg.+2 des. 12 deq.*2 den. Over

.O04 T.I.V.

.003/.012

.o20

.O05

.O04

12 deg.k2 deg.

' / ~ ~ / 4

~

\

'k"9Odeg.

11 dea.h2 dea.

I dea.*2 8

dea.

I

I

.O04 T.I.V.

.005/.020

I

.O25

I

.O07

~~~~~~

GENERAL NOTE: Source NAS 907, 14 Feb. 1986, pp. 15 and 16.

48

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

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I

.O04

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

50 deg.

'

ASME B 9 4 - L L M 93

m 0759670 0540704 L36 m

TWIST DRILLS

ASME B94.11 M-1993

Cylindrical or Flatted Shanks Uniform dimensions for alldrillsizes from A = 112 in. to A = 1-114 in.

0.500

Y

I

-

-

*

IL2.25."

For A = 1/2 in. t o 1 in., these drills are standardized t o be available in 1/32 in. increments. For A = 1 in. t o 1-1/4 in., these drills are standardized t o be available in 1/16 in. increments.

FIG. 4

' -

'

L

DIMENSIONS OF FRACTIONAL SIZE TWIST DRILLS - HIGH SPEEDSTEEL (SILVER AND DEMING STYLE)

49

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

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ASME B94.LLM

m 0759670 0540705

93

O72

TWIST DRILLS

ASME B94.11M-1993

x

E 3 \ i -

118 deg.

"

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

L

*

*

- F

*

Drill diameter 11/32 in. (8.733 mm) and smaller

L

r

diameter

Drill diameter 3/8 in. (9.525 mm) and larger Nominal shank is size

TABLE 7

for See Table 10tolerances

same as nominal drill size

GENERAL DIMENSIONS OF THREE AND FOUR FLUTE STRAIGHT SHANK CORE DRILLS FRACTIONAL SIZES ONLY

l-

Diameter of Drill Decimal Inch Equivalent

Millimeter Equivalent

0.2500 0.281 2 0.3125 0.3438 0.3750

F

Three Flute Flute Length F

f

Overall Length

L

F

Inch

Millimeters

Inch

Millimeters

6.350 7.142 7.938 8.733 9.525

3% 37h 4 4% 4%

95 98 102 105 105

61 '0 61 '4 6% 61 '2 6%

156 159 162 165 171

0.4062 0.4375 0.4688 0.5000 0.5312

10.31 7 11.112 1 1.908 12.700 13.492

43h 45h 4% 4314 4314

111 117 121 121 121

7 7114 7% 7314 8

178 184 190 197 2 03

0.5625 0.5938 0.6250 0.6562 0.6875

14.288 15.083 15.875 16.667 17.462

47h 47h 47h 5% 5318

124 124 124 130 137

81 '4 8314 874 9 91 '4

0.71 88 0.7500 0.781 2 0.81 25 0.8438

18.258 19.050 19.842 20.638 21.433

... ...

...

...

...

...

...

4314

121 121

7314 8

197 203

210 222 222 229 235

47h 47h 4718 5'18 5318

124 124 124 130 137

8'14

8% 9 91 '4

210 222 222 229 235

5518 5718 6 61'8 6

143 149 152 156 156

91 '2 9314 9718 10 10

241 248 251 254 254

...

... 248

... ...

...

... ...

... ... ...

... 4314

... ...

50

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

...

...

...

9314

...

...

Millimeters

...

...

...

L Inch

...

149

... ...

f

Millimeters

...

...

...

F Inch

Overall Lentlth

...

5718

...

Four Flute Flute Lenath

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... ... ...

8314

... ... ...

ASME B 9 4 - L L M 93 W 0759670 0540706 T09 W

TWIST DRILLS

TABLE 7

ASME 894.11M-1993

GENERAL DIMENSIONS OF THREE AND FOUR FLUTE STRAIGHT SHANK CORE DRILLS FRACTIONAL SIZES ONLY (CONT'D)

l-

Diameter of Drill

Three Flute

Overall Length

F

L

Millimeter Equivalent

22.225 23.017 23.812 24.608 25.400

...

1

0.8750 0.9062 0.9375 0.9688 1.o000

1'132 I %G 1%2 1'Is 1'14

1.0312 1.O625 1.0938 1.1250 1.2500

26.1 92 26.988 27.783 28.575 31.750

... ...

D Inches 71~

29/32 15h

3'/32

i T

Flute Length Decimal Inch Equivalent

Inch

...

... ... ... ...

Millimeters

...

...

... ... ... ... ...

Four Flute

Flute Length

F Inch

6lIa 6% 6% 63/a 63/s

6% 6% 61' s 7 'Is 7%

... ... L

L

Millimeters

Inch

Millimeters

156 156 162 162

10 10 103/4 11 11

2 54 2 54 273 279 279

165 168 175 181 200

11'la 111'4 11'I2 113/4 12112

283 286 292 298 31 8

156

51 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Overall Length

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

A S I E B74.LLM

73

O757670 0540707 745

TWIST DRILLS

A SME B94.11M - I 993

Taper shank dimensions and tolerances in accordance with American National Standard 85.10. Machine Tapers.

TABLE 8

See Table 10 for tolerances

GENERAL DIMENSIONS OF THREE AND FOUR FLUTE TAPER SHANK CORE DRILLS FRACTIONAL SIZES ONLY

T-

~

ÏDiameter of Drill Decimal Inch Equiv.,

mm Equiv.

t

Morse Taper Number

F

Three Flute Flute Length

F

f

-

L mm 156 159 162 165 171

Morse Taper Number

I

Flute Lenath

Overall Length

L

F

mm

Inch

mm

... ... ... ... ...

...

...

...

... ... ...

...

...

... ...

...

... ...

2 2

431s 4%

111 117

210 216

2

4% 4%

222 222 222 229 235

A

Inch

6.350 7.1 42 7.938 8.733 9.525

1 1 1 1 1

2710 3 31'0 31'4 3 '12

mm 73 76 79 83 89

0.4062 0.4375 0.4688 0.5000 0.531 2

10.217 11.112 11.908 12.700 13.492

1 1 1 2 2

351a 3% 41 '0 d3/8 4%

92 98 105 111 117

178 184 190 21o 21 6

0.5625 0.5938 0.6250 0.6562 0.6875

14.288 15.083 15.81 5 16.668 17.462

2 2 2 2 2

4% 4% 4% 511s 531s

124 124 124 130 137

222 222 222 229 235

2 2 2 2

51 '8 5jIa

124 124 124 130 137

0.7 188 0.7500 0.781 2 0.8125 0.8438

18.258 19.050 19.842 20.638 2 1.433

2 2 2 3 3

551s 57/8 6 6'1s 6'1s

143 149 152 156 156

241 248 251 273 273

2 2 2 3 3

55/8 51' s 6 6% 6%

143 149 1 52 1 56 156

241 248 251 273 273

0.8750 0.9062 0.9375 0.9688 1.o000

22.225 23.000 23.81 2 24.608 25.400

3 3 3 3 3

61 's 6% 6% 63/s 63/s

273 273 273 279 279 -

3 3 3 3 3

6% 6% 6% 63h7 63L3

156 156 156 162 162

273 273 273 279 279 -

0.2500 0.2812 0.3175 0.3438 0.3750

A

Inch

Overall Length

Four Flute

156 156 156 162 162 -

...

...

...

... ...

...

52 --`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

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... f

.

.

...

... ...

... ...

...

ASME B 9 4 - L L M 93 m 0 7 5 9 b 7 0 0540708 881 m

TWIST DRILLS

GENERAL DIMENSIONS OF THREE AND FOUR FLUTE TAPER SHANK CORE DRILLS FRACTIONAL SIZES ONLY (CONT'D)

Diameter of Drill

t

Morse Taper Number

Decimal Inch Equiv.

mm Equiv.

1.0312 1.0625 1.O938 1.1250 1.1 562

26.192 26.988 27.783 28.575 29.367

1.1875 1.2188 1.2500 1.281 2 1.31 25

30.1 62 30.958 31.750 32.542 33.338

1.3438 1.3750 1.4062 1.4375 1.4683

34.1 33 34.925 35.7 17 36.512 37.300

... ... ...

1.5000 1.531 2 1.5675 1.5938 1.6250

38.1 O0 38.892 39.688 40.483 41.275

...

1.6562 1.6875 1.8438 1.7500 1.781 2

42.067 42.862 43.658 44.450 45.262

1.8125 1.o000 1.8750 1.9062 1.9375

46.038 46.833 47.625 48.41 7 49.21 2

1.9688 2.0000 2.1250 2.2500 2.3750

50.008 50.800 53.975 57.1 50 60.325

2.5000

63.500

A

F

T

Three Flute Flute Length

F

f

Overall Length

L

6% 6% 6% 7% 7%

165 168 175 181 184

283 286 318 324 327

13 13% 13%

330 333 343

...

...

4 4 4 4 4

73h 71'2 7% 8% 8%

187 190 200 216 219

330 333 343 359 362

... ... ...

... ... ...

4 4 4 4 4

8% 8'h 9 9'18 9%

222 225 229 232 235

365 368 37 1 37 5 37 8

9%

...

4 5 5 5 5

10

238 238 244 251 254

381 41 6 422 429 432

... ... ... ... ...

5 5 5 5 5

10'10 10'10 10'10 1O'h 1O'h

257 2 57 257 257 257

435 435 435 435 435

...

5 5 5 5 5

10% 10'/8 10310 103h 103h

257 257 264 264 264

435 435 441 441 441

5 5 5 5 5

10% 1031~ 10% 10% 1O'h

264 264 260 2 57 2 57

441 441 441 441 441

5

1 '14 1

286 -

476

165 168 175 181 184

1 110 11'14 12% 12% 12%

4 4 4

73h 71'2 7%

187 190 200

... ... ... ...

... ...

... ... ...

... ...

... ...

... ... ...

...

... ...

...

...

...

... ... ...

...

...

... ... ... ... ...

...

...

...

...

...

...

...

...

... ...

... ... ...

...

...

...

... ...

... ...

...

... ... ...

...

...

... ... ... ... ...

... ...

...

... ...

...

...

... ...

...

...

... ... ...

-

...

...

...

... ...

...

...

... .,. ...

...

...

...

...

...

... ...

... ...

... ... ... ... ...

...

...

... -

...

...

... ...

... ...

...

mm

...

...

... ...

93h 9%

9%

53

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

L

3 3 4 4 4

6% 61's 6JJs 7'1s 7%

... ...

f

mm -

283 286 318 324 327

3 3 4 4 4

... ...

F

Overall Length

Inch

mm

...

Flute Length

A

Inch

Inch

...

i F Morse Taper Number

Four Flute

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

mm -

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

TABLE 8

ASME B94.11M-1993

TWIST DRILLS

ASME B94.11M-1993

120 deg.

60 deg.

I rA

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

A

O I

DIMENSIONS OF COMBINED DRILLS AND COUNTERSINKS

TABLE9AGENERAL

Plain Type

I

f

Body Diameter

A Millimeters

'Il

6

-r D

Inches

2.38 2.38 3.1 8 4.76 6.35

f

Drill Diameter

Drill Length

Millimeters

Inches

0.64 0.79 1.19 1.S8 2.78

.O30 .O38 3/64

'/a

y16 '132

'14

51~6

f

L Inches

Millimeters

0.76 0.97 1.19 1 .S8 2.78

1'Ia 1'la 1% 1718 2

29 29 32 48 51

3.1 8 4.76 5.56 6.35 7.94

2 'la 2% 3 3% 3'h

54 70 76 83 89

Millimeters

'164 '164

3.1 8 4.76 5.56 6.35 7.94

7.94 11.11 12.70 15.88 19.05

C

Overall Length

Bell Type

TI

Body Diameter

Size Designation Inches

11 12 13 14 15

'la %6 'I4

51' 6 '/i

6

16 17

51~

18

3/4

'12

A

f F

Millimeters

3.1 8 4.76 6.35 7.94 11.11 12.70 15.88 19.05

Drill Diameter

Inches

L

D

1 Millimeters 1.19 1.59 2.38 2.78 3.97 4.76 5.56 6.35

f F

Bell Diameter

E

f

Drill Lenath

I

L

Millimeters [ Inches

I Millimeters

Inches

Millimeters

0.10 0.1 5 0.20 0.25 0.35

2.5 3.8 5.1 6.4 8.1

1.19 1.59 2.38 2.78 3.97

32 48 51 54 70

10.2 12.7 15.2

4.76 5.56 6.35

76 83 89

0.40 0.50 0.60

54

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

Overall Lenath

C

Licensee=Bureau Veritas/5974260001, User=Rodriguez, Sergio Not for Resale, 05/28/2013 12:00:55 MDT

TWIST DRILLS

ASME B94.11M-1993

TABLE9BTOLERANCES

OF COMBINED DRILLS AND COUNTERSINKS Inches

Size Designations

Element diameter Bodv

IA)

I

I

All sizes

I

Plus ( + )

I

Minus ( - 1

0.0000

I

0.0020

0.008

0.008

I

3 through 8 ’/M

13 through 18 diameter Drill

ID)

I

All sizes All sizes

I

0.0030 ‘132

I

0.0000

’h

6

I

Plus ( + )

I

Minus ( - )

0.000

I

0.051

0.1 3

0.1 3

0.20

0.20

0.4 0.076

0.8

I I

0.4 0.000

1.6

--`,``,`,```,`,,,,`,`,,,`,```,``-`-`,,`,,`,`,,`---

Overall length (L)

I

0.005 0.005

O0 O through 2 11 and 12

Drill length (C)

Millimeters

Copyright ASME International Provided by IHS under license with ASME No reproduction or networking permitted without license from IHS

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TWIST DRILLS

ASME 894.1 1M-1993

ELEMENT TOLERANCES FOR HIGH SPEEDSTEEL GENERAL PURPOSE TWIST DRILLS

TABLE 10

Drill Diameter at Point Tolerance

Millimeters

Inches From #97 through #81 Over #81 through 1'8 Over through '14 Over through

From Over Over Over

Over 1'2 Over 1 Over 2

Over 12.70 through 25.40 Over 25.40 through 50.80 Over 50.80 throuah 88.90

through 1 through 2 through 3%

Millimeters

Inches

Diameter of Drill 0.15 0.33 3.18 6.35

through through through through

0.33 3.18 6.35 12.70

Plus ( + )

Minus I - )

Plus ( + )

Minus ( - 1

0.0002

0.0002 0.0005 0.0007 0.001 o

0.005

0.000 0.000 0.000

0.005 0.013 0.01 8 0.025

0.001 2 0.001 5 0.0020

0.000 0.000 0.000

0.030 0.038 0.051

0.0000 0.0000 0.0000 0.0000

0.0000 0.0000

~~~

Shank Diameter (Straight Shank Drills) Tolerance Diameter of Drill

From#97 through #81

Plus ( + )

Minus ( - )

Over #81 through '18 Over '/8 through 1'4 Over through V2

Over 0.33 through 3.18 Over 3.18 through 6.35 Over 6.35 through 12.70

0.0000

Over

Over 12.70 through 50.80

0.0005

through 2

Plus ( + 1

Minus I - 1 0.005 Minus ( - ) 0.064 0.076 0.1 14

0.0002 0.0002 0.005 Minus ( - ) Minus ( - ) 0.000 0.0025 0.013 0.0030 0.0045 0.0005 0.01 3

From 0.15 through 0.33 Minus ( - )

V2

Millimeters

Inches

Millimeters

Inches

0.0005

0.0030

0.076

0.01 3

Back Taper Tolerance Per Unit of Flute Length

Diameter of Drill Inches

Millimeters

From#97 through #81 Over #81 through Va Over 'h through Over V4 through V2

From Over Over Over

Over 'h Over 1

Over 12.70 through 25.40 Over 25.40 through 88.90

through 1 through 3%

0.15 0.33 3.18 6.35

through through through through

0.33 3.18 6.35 12.70

Inches

Millimeters

None 0.0000t o 0.0008 0.0002 to 0.0008 0.0002 to 0.0009

0.000 to 0.020 0.005to 0.020 0.005 to 0.022

0.0003 to 0.001 1 0.0004to 0.001 5

0.007 to 0.028 0.010 to 0.038

None

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TWIST DRILLS

ASME 894.1 1M-1993

TABLE 10 ELEMENTTOLERANCES FOR HIGH SPEEDSTEEL GENERAL PURPOSE TWIST DRILLS (CONT'D) Flute Length Tolerance Diameter of Drill Inches

Inches

Millimeters From 0.15 Over 0.33 Over 3.18 Over 12.70

Over 1 Over 2

Over 25.40 through 50.80 Over 50.80 throuah 88.90

through 2 through 3%

through through through through

Plus ( + )

From#97 through #81 Over #81 through '/e Over '18 through Il2 Over 'h through 1

0.33 3.18 12.70 25.40

Millimeters

Minus(-)

1

Plus ( + )

I

I

Minus ( - )

.4

.4

3.2 3.2 6.4

1.6 3.2 3.2

6.4 9.5

6.4

9.5

Overall Length

F

Diameter of Drill Millimeters

Inches From#97 through #81 Over #81 through l l s Over '/a through '12 Over '12 through 1 Over 1 Over 2

through 2 through 3%

From 0.15 Over 0.33 Over 3.18 Over 12.70

through through through through

Tolerance ~~

Plus (

0.33 3.18 12.70 25.40

Over 25.40 through 50.80 Over 50.80 through 88.90

Millimeters

Inches

+1

Minus ( - )

'132

'132

'L 'Is

'h6 3.2

'lu

'Is 'Is

'14

'14

3/8

31~

Plus ( +)

Minus (- )

0.8 3.2 3.2 6.4

0.8 1.6

6.4 9.5

6.4 9.5

3.2

Included Angle of Point Diameter of Drill Inches From '/W through l / ~ Over '12 through 1% Over 1% through 3%

ToleranceMillimetersAngle From 1.59 through 12.70 Over 12.70 through 38.10 Over 38.10 through 88.90

Included

118O 118O 118O

f50 f 30

f2O

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GENERAL NOTE: 95% of drills in any one lot to fall within above tolerance.

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b

ASME B 9 4 . 3 3 M 93

m 0759670 0540733 149 m

ASME B94.11M-1993

TABLE 10 ELEMENT TOLERANCES FOR HIGH SPEEDSTEEL . GENERAL PURPOSE TWIST DRILLS (CONT'D) Lip Height Tolerance Diameter of Drill Inches Fr0m1/16 Over Over V4 Over Over 1

Total Indicator Variation (T.I.V.1

Millimeters

through 'L 0.051From 1.59 0.076Over 3.18 through Over 6.35 through Over 12.70 through 1 Over 25.40 throuah 3%

through through through through through

Inches 0.0020 0.0030 0.0040 0.0050 0.0060

3.18 6.35 12.70 25.40 88.90

Millimeters

02 27

0.1 0.1 0.1 52

GENERAL NOTES: (a) 95% of drills in any one lot to fall within above tolerance. (b) Methodof measurement: Rotate the drill in a V-block against a back end stop. Measure the cutting lip height variation on a comparator, or with an indicator set at a location approximately 75% of the distance from the center to the periphery of the drill.

Centrality of Web Tolerance Diameter of Drill Inches From1/16 Over '/S Over 'IS Over Over 1

Total Indicator Variation (T.l.V.1

Millimeters

through 'L through through l/z through 1 throuah 3%

From 1.59 Over 3.18 Over 6.35 Over 12.70 Over 25.40

through through through through through

3.18 6.35 12.70 25.40 88.90

Inches

Millimeters

0.0030 0.0040 0.0050 0.0070 0.01 O0

0.076 0.1 02 O. 127 0.1 78 0.254

GENERAL NOTES: (a) 95% of drills in any one lot to fall within above tolerance. (b)Method of measurement: Rotate the drill in a close fitting bushing. Record the difference in indicator readings of the web at the point as the drill is indexed 180 deg.

Flute Spacing

I Diameter of Drill Inches From'/ls Over Over V4 Over 'h Over 1

through '/LI through through V2 through 1 through 3%

Millimeters From 1.59 Over 3.18 Over6.35 Over 12.70 Over 25.40

Tolerance

Total Indicator Variation Actual (T.I.V.) through through through through through

Inches 3.18 6.35 12.70 25.40 88.90

0.0030 0.0060 0.0100 0.01 40 0.0260

1

Deviation

Millimeters

Inches

0.076 0.152 0.254 0.356 0.660

0.001 5

0.0030 0.0050 0.0070 0.0130

1

Millimeters 0.038 0.076 O.127 O.178 0.330

GENERAL NOTES: (a)95% of drills in any one lot to fall within above tolerance. (b) Methodof measurement: Place the drill in a V-block against a back end stop, and rotate it against a radial finger stop. Take an indicator reading at the leading edge of the margin on the opposite flute. Repeat for the other flute and note thedifference between the two readings. The deviation in flute spacingis equal to one-half the difference between the two readings.

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ASME B 9 4 - 1 1 M 93

m

0759b70 0540714 085 W

ASME 694.11M-1993

TWIST DRILLS

TABLE 10 ELEMENTTOLERANCES FOR HIGH SPEED STEEL GENERAL PURPOSE TWIST DRILLS (CONT'D)

Runout (Straightness) Jobbers Length: For drills smaller than .O3125in., runout tolerances to be to manufacturer's discretion. For drills ,03125 in. and larger, runout tolerances are to be calculated per the following formula:

[

overall length Maximum TIR= .O001316 (drill diameter)]

-k

Examples Maximum TIR

Diameter

.O08 .O07 ,006 .O05 .O05

TaperLengths: For drills smaller than ,03125in., runout tolerances to be to manufacturer's discretion. For drills .O31 25 in. and larger, runout tolerances are to be calculated per the following formula: overall length Maximum TIR = ,000375 (drill diameter)] The maximum allowable value, however, is .O20 TIR.

Examples Diameter

I

Maximum TIR .O21 (use ,020) .O18 .o12 ,009 .o09

.O08 .O07 .O06

GENERAL NOTES: (a)The portion of Table 10 on pages 59 and 60 is excerpted from Table 805 in Metal Cutting ToolHandbook, Seventh Edition, published for theUS. Cutting of the U.S. Cutting Tool Instituteby Industrial Press. Reproduced by permission Tool Institute. (b)All dimensions are in inches.

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ASME B94.11M-1993

Runout (Straightness) Screw Machine Lengths: For drills smaller than .O400 in., runout tolerances to be to manufacturer's discretion. For drills .O400 in. and larger, runout tolerances are to be calculated per the following formula: overall length

[

]

i .O0368 (drill diameter) The maximum allowable value, however, is .O07 in. TIR.

Maximum TIR = .O001316

Examdes .O07 .O06 .O05

.O05 .O05 .O05 .O04 .O04

I

6 in. Aircraft Drills Maximum TIR

RangeDiameter .o20

.0400-,0624 .0625-.1249 ,1250-.2499 ,2500-.3749 .3750-.4999 .5000

.o12 .o1

.O1 5

o .O07 .O05 12 in. Aircraft Drills

~

Maximum TIR

RangeDiameter .O40

.0400-.O624 .0625-,1934 .1935-,5000

.O35 .O25

TaDer Shank Diameter Range

Maximum TIR

.1250-,3749 ,3750-1.4999 1.5000 and laraer

.O15 .o1o .O07

GENERAL NOTES (a) All dimensions are in inches. (b)95% of drills in any one lot to fall within above tolerance. (c)Method of measurement: (1) Straight shankdrills are to bechecked with 1 in. of shank in a V-block with measurements taken on themargins at the point. If shank length isshorter than 1 in., use the full length of shank. (2)Taper shank drills are to be checked with the shank in a tapered V-block or a precision socket. (d)Calculated values are to be rounded to the nearer thousandth of an inch.

60

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TABLE 10 ELEMENTTOLERANCESFOR HIGH SPEED STEEL GENERAL PURPOSE TWIST DRILLS (CONT'D)

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