Two times strike by pressure forging, cold forging technology make product strange and light , forging product strange 700-1000Mpa,

The depth of decarburization with joint spherical surface limited 0.05mm, the depth of surface defect limited 0.5mm, the hardness of CV joint forging

request 22-25HRC. good metal flow line .

Protech company is a subsidiary, set up by Changzhou Chaoyu Mechanical Manufacture Co., LTD, specialized in developing driving axles, and providing testing and sales programs in USA. Protech CV is our company brand . Now its headquarter is in Los Angeles, equipped with our own developing team, office and warehouse. Company pays highly attention to quality and cooperates with many famous American companies with the help of advanced technology in the parent firm. Its products sell to a lot of well-known supermarkets and big dealers and gain a good fame.

Production in China, developing in USA, and sales in the worldwide, Protech company set up a holly developing team to North American market, specialized in developing and selling in the aftermarket, providing customers personalized solutions as per different market features, satisfying diversity demands. Company’s product idea is to seek for excellence, technology innovation and perfect quality, trying to become a superior and reliable carparts supplier.