Considering the market supply of many different specifications, the synchronous belt wheel and specific size of the difference of different specifications products, as well as the different size of pulley, the appropriate application must be different. Therefore, we need to pay attention to the size of the pulley when buying pulleys, and ensure that completes the choice on the size, thus optimizing the selection of the pulley. About the size of the synchronous belt wheel, we need to pay attention to one thing is the inner and outer diameter of the synchronous belt wheel, which means that this area will it is directly related to the size of the normal placed in installation position. So, when you buy pulley, natural need to pay attention to inside and outside data, to determine whether it can be installed and used in your equipment. Second, we need to look at the width of the synchronous belt wheel. The pulley width of equipment used in different. When buying a belt wheel, we need to pay attention to choose the width of the pulleys according to application requirements, to ensure that the purchase of pulley meet the application requirements in terms of width. We should also pay attention to the material thickness of the synchronous belt wheel, but that is because, from the point of view of applicability and quality of the thickness of the belt wheel has certain requirements.