Aug 09, 2021 Aug 09, 2021 Enter the diameter of the pulley and the RPM of the pulley system into the calculator to determine the belt speed. Belt Length Calculator (2 pulley system) Pulley Weight Calculator; Mechanical Advantage Calculator (Lever) Pulley Torque Calculator; Belt Speed Formula. The following formula is used to calculate the belt speed of a conveyor system. V = pi/2 * D * RPM

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