How to find the total volume of Earthmovers buckets?
Spec sheets for excavators like the one on the first link typically talk about the SAE standard at 2/1 heaped. The standard is the Society of Automotive Engineers standard J742. Interestingly this standard, which came out in 1979 was cancelled in 2001 and not replaced. However you can still purchase this document for $98.from the second link. The summary for the standard says Description: This standard applies to buckets of loaders (as defined by SAE J1057a, Identification Terminology of Earthmoving Machines). This method applies primarily to buckets having parallel sides and a cutting edge parallel to the top edge of the back sheet. Moderately clipped back sheet corners will introduce no appreciable errors. Bucket teeth, tooth adapters, as well as other similar local discontinuities are ignored. a. Interpretation of irregular shaped cutting edges is identified in paragraph 4.4. b. Interpretation of irregular shaped side sheets is identified in paragraph 4.5. Purpose - The purpose of this standard is to provide a uniform method for determining the SAE struck capacity and rated capacity. The volume calculations used result in a realistically conservative heaped volume. The calculations are based on the inside physical dimensions of the bucket only without regard to bucket action provided by any particular machine. For rating purposes, a nominal heaped load with a 2:1 angle of repose is to be used with bucket orientation dictated by the strike plane defined in paragraph 3.1. This in no way implies that the loader linkage must carry the bucket oriented in this attitude, or that all materials will naturally have a 2:1 angle of repose. So effectively use geometry depending on the buckets shape. If it has parallel sides its going to be height X width X length for the struck volume with the addition of the prism for the heaped volume. 2/1 means 2 horizontal for 1 vertical. So the prism volume will be length X width X width / 8.
