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Choosing the Right Bucket
Determining the right bucket for your machine

  1. Obtain the Maximum Lift for machine from OEM specifications. The maximum lift capacity should be assumed to be at full reach over the side for the machine including the weight of the OEM bucket.
  2. Calculate the Adjusted Lift Capacity. This is calculated by adding the Maximum Lift of the machine and the OEM bucket weight.
    (Maximum Lift + OEM Bucket Weight = Adjusted Lift Capacity)
  3. Determine the weight of any attachments that will be added to the end of the stick. For example, if there is going to be a coupler, bucket, and thumb, the combined weight of these three attachments is needed.
  4. Find the density of the material. Refer to material density chart on page 9 to determine the correct material density.
  5. Calculate the Lift Weight. This is accomplished first by multiplying the bucket capacity by the material density. This number is then added to the attachment weight to determine the lift weight. (Bucket Weight x Material Density) + Attachment Weight = Lift Weight)
  6. Calculate the Lift Ratio. This ratio is determined by dividing the Lift Weight by the Adjusted Lift Capacity. (Lift Weight/Adjusted Lift Capacity = Lift Ratio)
    • If the Lift Ratio is less than 1.0, the bucket chosen is acceptable for the application.
    • If the Lift Ratio is above 1.0, a smaller capacity bucket should be chosen for the application.

Material Fill Chart

Example: Find Largest Bucket size for a 20MT Excavator

OEM Lift at Full Reach: 6290 lb
OEM Bucket Weight: 1790 lbs (36” bucket)
Dig Dog Bucket Weight: 1815 lbs (48" bucket)
Bucket Capacity: 1.43 cu yds
Material Density: 3850 lb/cu yd
Adjusted Lift Capacity: (6290 + 1790) = 8080 lbs
Attachment Weight: (1950 + 0 + 0) = 1950 lbs
Lift Weight: (1.43 x 3850) = 5505 lbs + 1815 = 7320
Lift Ratio: (7320/8080) = .905

Mini Excavator Bucket Diagrams

 

Item No. Part Description
1 EDGE PLATE
2 SIDE PLATE
3 SUPPORT BAR
4 SHELL PLATE
5 PIVOT PLATE
6 TOE PLATE
7 COMPRESSION PLATE
8 BOSS
9 WEAR STRAPS
10 PINS

10 + Excavator Bucket

Item No. Part Description
1 Edge plate
2 Upper beam
3 lower beam
4 Lower shell
5 Toe plate
6 Side plate
7 Side protection plate
8 Outer wear straps
9 Wear straps
10 Back Brace
11 Lifting Eye
12 Side Shroud
13 Seat Protector Segment
 
 

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PO Box G, Brookville, PA 15825 | 888-377-9876 | attachmentsplus.com