The shape error of chrome steel ball is one of the important reasons that affect the vibration and noise of bearing. In the process of chrome steel ball processing, the chrome steel ball contacts with the surface of the disc groove, which is squeezed and rubbed, consuming the surplus metal on the surface of the ball billet, and gradually grinding the ball.
In order to reduce the shape error of chrome steel ball, various technical measures are taken in the process. The larger the shape error of chrome steel ball is, the larger the vibration value of bearing is, so the shape error of chrome steel ball must be reduced. When the bearing rotates, due to the shape error of the ball, the center position of the ball is forced to change continuously, which causes the bearing vibration and Noise, shape error of chrome steel ball will cause low frequency vibration of bearing。