There are many factors affecting the bearing life, such as coordination of shaft and seat hole, work environment, stress, lubrication and so on. Which have to say is the impact of bearing steel ball. Bearing steel ball is the bearing load rolling body in the bearing, is one of the most important parts of the bearing. The processing process is quite complex, from the cold heading blanks to the finally cleaning and packing, involving a lot of processing processes, and each processing process will have a greater impact on the inherent quality and surface quality of the bearing steel ball. The manufacturing quality of bearing steel balls will directly affect the bearing life, which is extremely important.