A timing pulley is a wheel component used for transmission, which is often used in combination with a timing belt to achieve precision synchronous transmission. The timing pulley usually consists of two parts: the wheel flange and the hub. The wheel flange usually has a toothed structure that can be combined with a timing belt or chain to achieve a precise synchronous transmission effect. Synchronous wheels can be divided into two categories: grinding gear synchronous wheels and forged tooth synchronous wheels.