In numerous transmission device, the synchronous belt wheel has a very wide range of applications, but also can present a very good effect on transmission. When it had been used in many devices are able to present a very good transmission effect, is mainly because of its in terms of transmission has the following advantages: transmission advantages: high efficiency. Synchronous belt wheel transmission performance, because it can drive very smooth and constant transmission ratio accurately, and run faster, and present a high transmission efficiency. With the transmission advantage, can make equipment have faster speed and efficient function. Transmission advantage. 2: energy saving effect is good. Synchronous belt wheel in able to run with high speed transmission and constant transmission ratio, efficient transmission, to ensure that the equipment has a faster speed and efficient function at the same time, also can with its own structural features, when applied to present a very good energy saving effect. To the transmission depending on the advantage, can effectively reduce the operation cost of the equipment. Transmission of high efficiency and energy saving effect is good, is the synchronous belt wheel in the transmission of advantage, with the two transmission advantage, its nature can be used in many devices when they realize optimization of the transmission.