Bucket Elevator Capacity Worksheet

Buckets should be measured on the outside:
A – Length (also known as Width): Using a straight line, measure the distance across the back of the bucket.
B – Projection: the most commonly mis-measured dimension. The easiest way to measure projection is from the bolt line in back of bucket to front lip. Be sure to allow for thickness of back of bucket.
C -Depth (height): Using a straight line down the side of the bucket, measure the top of the back to the bottom of the bucket.
D – Front Angle: Angle is measured from the horizontal, back up to the front of the bucket.

elevavtor_bucket_projectionsHow do I determine the proper bolt length for bucket installation?
To determine the proper bolt length, add together the following thicknesses:
• the belt
• the back of the bucket
• any washers required
• twice the thickness of the nut
Round this total to the nearest 1/4″ standard bolt length, and you have the proper length for bucket installation.
Tip: If using fanged bolts, be sure to add the length of the fangs to your total length. To determine the proper bolt length, add together the following thicknesses:

How do I determine quantity of buckets for a given belt length?
First, determine the vertical centers (spacing between the buckets) in inches. Second, find the total length of the belt in inches. Then divide length of the belt by the vertical centers and you will have the number of buckets needed. Tip: Be sure to add the amount of belting needed to wrap around the pullies.

How do I determine bucket spacing for CC-HD buckets?
Minimum bucket spacing has historically been nominal projection plus 2″. Many style CC buckets, however, are being used at projection plus 1″, and some even closer. For engineering purposes Tapco recommends using nominal projection plus 2″.

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