Definition: This calculator computes the rotational speed (\( RPM_s \)) of a pulley based on the belt speed (\( bS \)) and the pulley diameter (\( D \)). Purpose: It is used in mechanical engineering to determine the rotational speed of pulleys in belt-driven systems, applicable in machinery, conveyor systems, and automotive applications., Welcome to the Pulley Speed Calculator! This tool helps you determine the speed of the driven pulley (N₂) based on the diameters and speed of the driver pulley. Pulleys are widely used in mechanical systems to transmit power and change rotational speeds., You can find belt and pulley systems in your car's engine, the luggage belt at the airport, and in many other places: learn how to calculate pulleys' speed, diameter, and much more with our comprehensive and helpful tool! Learn: What is a belt and pulley system; How to calculate the RPM of a pulley and its diameter; How to calculate the pulley , To perform the calculations, it is necessary to set the rotational speed of the drive pulley n, power P, and gear ratio i. It is also necessary to select the belt types, classified by their dimensions from A to E. Based on the results of the calculation, the dimensions of the drive, number of belts providing the specified characteristics, shaft loads and durability of the drive are determined., To utilize the Pulley RPM Calculator, follow these simple steps: Enter the values for the pulley’s diameter and rotational speed. Click the “Calculate” button to obtain the RPM result. Review the calculated RPM displayed on the form. Formula. The formula for calculating pulley RPM is: RPM = π × D V × 60 where: RPM is the Revolutions , To calculate the total belt length (L), you need to: Determine the radii of all three pulleys (R₁, R₂, R₃). Measure the center distances between pulleys (C₁₂, C₁₃, C₂₃)..