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A0020 Information on Belts, Pulley Sizes and Speeds


Glenn
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A0020 Information on Belts, Pulley Sizes and Speeds

To find the circumference of a pulley:
Multiply the diameter by 3.1416.


To find the diameter of one pulley when its speed and the diameter and speed of the other pulley are known:

Multiply the diameter of the known pulley, in inches, by its speed in revolutions per minute and divide the product by the speed of the pulley required. The result is the diameter of the pulley in inches.


To find the speed of one pulley when its diameter and the speed and diameter of the other pulley are known.

Multiply the diameter of the known pulley, in inches, by its speed in revolutions per minute and divide the product by the diameter of the otherpulley in inches. The result is the speed of the pulley in revolutions per minute.


To find the speed of a belt:


Multiply the diameter in inches of either pulley by 3.1416, divide The result by 12 and multiply by the speed of that pulley in revolutions per minute. The result will be the belt speed in feet per minute.



To find the length of a belt:

Add the diameters in inches of both pulleys; divide the result by two and multiply by 3.1 416. Then divide by 12 and add twice the distance in feet between the centers of the shafts. The result is the length of the belt in feet.


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