D=large pulley’s diameter (in) d=small pulley diameter (in) the math is not as difficult as it appears.

How to measure pulleys for belt size. Overlap 4 inches of the nylon rope. The first thing you should do is measure the pulleys outside diameter (o.d). Push the moveable jaw downward until the belt goes from loose to.

Measure the overall width of the belt housing where the belt actually rides in the pulley. Without measuring the outside diameter, you won’t be able to choose a pulley with the right size. Next, we’ll take a measurement of the pitch diameter (p.d.), which is the diameter of the belt itself.

This may be for a drill, saw, polisher or other driven device. Measure or find the diameter of the bigger pulley measure or find the diameter or radius of the another smaller pulley measure the. If we need to calculate the distance between the centres of the two pulleys, then we can use the following calculations to approximate this.

D1 n1= d2 n2 (1) where. Yes, you need to measure the od (outside diameter) of v belt pulleys. Well get out the tape measure and the calculator.

Measuring pulley width is relatively simple. A larger driver pulley than driven pulley will produce higher driven than driver. To calculate the size of the pump pulley, you would need to divide the size of the drive pulley.

How to measure belt size for pulley. If you need an exact measurement, you can use the following formula: The driven pulley is the reactive pulley to the driver.