CV-Joint, also called the "constant velocity universal joints" is an important part of car driving system. Its role is to transfer the power of the engine from the transmission to the two front wheels, and drive the car at high speed. It is made up of a sliding sleeve, three to the shaft, drive shaft, a star shaped sleeve, cage, bell housing. The main parts are used for precision forging and processing, so as to meet the demands of heavy load, high transmission accuracy, and safety.