Pulley and Belt Calculator
How to calculate pulley speed and belt length
- Enter the diameters of the driving and driven pulleys.
- Enter the driving speed in RPM.
- Enter the distance between the pulley centres to get the belt length.
Frequently asked questions
Which belt length formula is used?
The open belt formula: L = 2C + π(D + d) / 2 + (D − d)² / 4C, where C is the centre distance.
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