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This recommended practice applies to hydraulic excavators as defined in SAE Standard J1057, which are crawler mounted. It describes the methods for calculating and specifying travel performance characteristics. It does not apply to wheel mounted excavators.

This SAE Standard provides a uniform method for determining rated and struck capacity for buckets used on excavators, mini-excavators, and backhoes as defined in SAE J1057 and equipped with hoe attachment. Calculations are based on the inside physical dimensions of the bucket only, without use of optional side cutters, spill guards, teeth, or other accessories and without regard to bucket action provided by any specific machine. This document does not cover shovel, clam, or dragline buckets described in SAE J67 or loader buckets described in SAE J742.

This Recommended Practice applies to mobile hydraulic excavators which are either crawler or wheel mounted, with or without outrigger members. (A mobile hydraulic excavator is defined as “a self-propelled machine with an upper structure capable of continuous rotation and which digs, elevates, swings, and dumps material by action of the boom and arm or telescoping boom with bucket.”)