Structural Composition Of Ball Bearings

Ball bearings are mainly composed of four basic elements: ball, inner ring, outer ring and retainer, also called cage or retainer. General industrial ball bearings meet the AISI 52100 standard. The balls and rings are usually made of high-chromium steel, and the Rockwell C-scale hardness is about 61-65. The hardness of the cage is lower than that of the ball and the ring, and its material is metal (such as: medium carbon steel, aluminum alloy) or non-metal (such as: Teflon, PTFE, polymer material). Ball bearings have smaller rotational frictional resistance than journal bearings, so at the same speed, the temperature generated by friction will be lower.