What is the Velocity Ratio In Belt Drive?

The Velocity Ratio (VR) in a belt drive system is the ratio of the speeds of the driving pulley to the driven pulley. It is calculated by dividing the diameter of the driving pulley by the diameter of the driven pulley. A higher velocity ratio indicates that the driven pulley will rotate more slowly than the driving pulley, which is important for applications requiring torque multiplication. This ratio is crucial in determining the efficiency and effectiveness of power transmission in mechanical systems.