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Bucket Fill Factors
Fill Factor is the percentage of an available volume in a hauler body, bucket or bowl that is actually used.
For example, a fill factor of 87 percent for a hauler body means that 13 percent of the rated volume is not being used to carry material. Buckets often have fill factors over 100 percent.
MATERIAL DESCRIPTION |
FILL FACTOR |
LOOSE MATERIAL |
|
Mixed Moist Aggregates |
95-100% |
Uniform Aggregates up to 3mm/1/8” |
95-100% |
3mm – 9mm/1/8”-3/8” |
90-95% |
12mm – 20mm/1/2”-3/4” |
85-90% |
24mm/1” and over |
85-90% |
BLASTED ROCK |
|
Well blasted |
80-95% |
Average Blasted |
75-90% |
Poorly blasted |
60-75% |
OTHER |
|
Rock Dirt Mixtures |
100-120% |
Moist Loam |
100-110% |
Soil, Boulders, roots |
80-100% |
Cemented Materials |
85-95% |
Notes
- Loader bucket fill factors are affected by bucket penetration, breakout force, rack back angle, bucket profile and ground engaging tools such as bucket teeth of bolt-on replaceable cutting edges.
- For bucket fill factors for hydraulic excavators, see bucket payloads in the hydraulic excavator section.
- Above values are not valid for Hydraulic Mining Shovels.
Additional materials can be found in the Caterpillar Performance Handbook. Consult your Cat dealer for more information.
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