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BGTS13-004 [2013.Nov/29] Bucket Capacity Definition for Excavator Bucket Capacity for Excavator is measured in terms of either “Struck” or “Heaped Capacity” (See below)

Generally the “Heaped Capacity” description is more frequently used. Bucket capacity which shows in catalogue or Parts Book is the “Heaped Capacity” There are various standards for designating the heaped capacity of the bucket. The principal difference among those definitions is the “Angle of Repose” (Slope) as listed in the below table (Back-hoe bucket). 

In case of ISO, SAE, PCSA and JIS Standard, angle of repose is 1 : 1



In case of CECE Standard, angle of repose is 1 : 2

Komatsu adopts SAE Standard for measuring bucket capacity so angle of repose is 1 : 1 (This measuring is bigger than 1 : 2)

REMARKS Komatsu used to measure bucket capacity based on CECE Standard and put it on catalogue and Parts Book before. But currently we Komatsu adopts SAE Standard in global. As you may notice, in case of old model such as PC200-7, Komatsu sometime put both rating of bucket on Parts Book (Please refer to the attached)

Sample of PC200-7

Bucket capacity based on CECE rating Bucket capacity based on SAE rating

Sample of PC200-8

No more CECE rating Bucket capacity based on SAE rating