Description: Fan Belt is usually V-shaped, and hence known as V-belt. The fan belt friction comes from the sides of the belt and the sides of the pulley grooves to transmit power from one pulley to the other through the belt. The sides have very large surface as they are used for power transmission. The wedging action of the belts prevents the belt form slipping while it curves in the pulley grooves. The belt uses the tension and friction to turn the auxiliary devices.