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All the bearings adopt chrome steel with oxygen contents less than 7ppm, and give special demand on the microelements in the steel. Meanwhile, all the precision bearings and super-precision bearings adopt high-purity steel with non-metallic inclusion’ sizes less than 0.0005mm.

After the raw materials bought into the factory, CYSD will analyze each batch of steel material with spectrograph to compare with material test report by the supplier, and only the qualified could be put into production.
Through the control of raw materials and the adjustment of the production process, CYSD achieves the high end oriented and technologicalized, and enhances the high added value of products, benefiting from the market as well as the customer.


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