Many of the synchronous belt wheel are in aluminum processing . Due to the rapid development of light industry, aluminum belt wheel machining does not rust belt, and aluminum belt wheel is in very light weight, such as not enough surface hardness can be done hard surface oxidation treatment.

　　Pulley surface qualities oxidation process also can improve the hardness, relatively more wear and look more beautiful. Synchronous belt wheel factory say that the belt wheel device is being developed along the development of small, high-speed, standardization direction. Extraordinary applications of synchronous belt wheel, timing belt pulleys and belt means, low vibration, low noise pulley device is designed belt round .

　　In order to achieve the purpose of Pulley device miniaturization , and can improve the bearing thrust existing involutes toothed pulley.