At present, parameters of the internal structure of China's sealed deep groove ball bearings are almost the same as that of foreign products. However, the level of vibration and noise of such products is very different from that of foreign products. It is mainly resulted from the manufacturing factors and working conditions. From the point of view of the bearing industry, the working condition factors can be considered through making reasonable demands on the main engine. However, how to reduce vibration and noise that are caused by the manufacturing is become an urgent problem for the bearing industry.
