Timing belt drive is composed of an inner peripheral surface of a pitch tooth ring belt andthe corresponding fit round. It combines the advantages of belt drive, chain drive and gear drive with their respective. Rotation, to transmit power through a toothed wheel alveolar meshing.Synchronous belt drive has accurate transmission ratio, non slip, can obtain a constant speed ratio, stable transmission, can absorb the vibration, low noise, large transmission ratio range,generally up to 1:10. Allow line speeds of up to 50M/S, transfer power from a few watts tohundreds of kilowatts. The transmission efficiency is high, can reach 98%, compact structure,suitable for multi axis drive, no lubrication, no pollution, and therefore can not allow bad pollution and working environment of the normal work place.