- 1). Measure the diameter of the pulley whose axle is attached directly to the motor's rotor or crankshaft. This pulley is known as the motor sheave.
- 2). Measure the diameter of the pulley which is turned by the motor sheave (by way of the belt). This pulley is known as the driven sheave.
- 3). Divide the diameter of the motor sheave by the diameter of the driven sheave. The result is the "sheave ratio" for that particular belt-and-pulley system.
For example, if the motor sheave's diameter was 9 centimeters and the driven sheave's 12 centimeters, then the sheave ratio for the system would be 9/12 = 0.75.
previous post
next post