A belt drive is a method of transferring rotary motion between two shafts. A belt drive includes one pulley on each shaft and one or more continuous belts over the two pulleys. The motion of the driving pulley is, generally, transferred to the driven pulley via the friction between the belt and the pulley. The transmission belts can be classified as Flat, Vee, Poly-Vee, Timing/synchronous belts etc. Vee belts (or V Belts) are the most widely used belts. V belt drives replaced flat belt drives for many applications because higher power could be transmitted with more compact drive arrangements. V Belt Drives achieve drive efficiencies of about 95%.