Materials needed for needle roller bearing production

The ferrule and tumbling body of the needle roller bearing repeatedly receive high contact pressure while stopping the tumbling contact accompanied by sliding. The stick is in sliding contact with the ferrule and the sides of the tossing body, or one of the sides, while receiving the pulling force and the shrinking force. Therefore, the materials, performance, and main requirements for bearing rings, tumbling bodies and retainers are as follows.

　Performance required for ferrule and tossing body data:

  Tossing fatigue, high intensity, high hardness, high abrasion resistance, to maintain the required performance of the frame data:

Good dimensional stability and high mechanical strength. In addition, good workability is also required. According to different uses, there are also requirements for good impact resistance, heat resistance, and corrosion resistance.

  Information about ferrules and tumbling bodies:

Rings and tumbling bodies usually use high-carbon chromium bearing steel. Most of the bearings use SUJ2 in the JIS steel grade. SUJ3 is used for large bearings.

　The chemical composition of SUJ2 has been standardized as a bearing material in various countries around the world. For example: It is the same kind of steel as AISL52100 (USA), DIN100Cr6 (West Germany), BS535A99 (UK), etc.

　 Under the condition of further demand for impact resistance, chromium steel, chromium molybdenum steel, nickel chromium molybdenum steel, carburizing and quenching are used as bearing materials, so that the steel has a hardened layer from the surface to the appropriate depth. Carburized bearings with proper hardening depth, fine structure, suitable hardness appearance and core hardness have better impact resistance than bearings using bearing steel, and the chemical composition of ordinary carburized bearing steel.

　 Youcheng bearings have implemented vacuum degassing treatment, so the materials used have high cleanliness, low oxygen content and good quality. Furthermore, proper heat treatment is adopted to significantly improve the life of the bearing torsion fatigue.

　 In addition to the above-mentioned steel grades, high-speed steel with excellent heat resistance and stainless steel with good corrosion resistance are also used according to special applications.

 　Insist on the information:

　 The material of the stamping and holding frame is made of low carbon steel. According to different uses, brass plates and stainless steel plates are also used. The material of the holding frame is cut using high-strength brass, carbon steel, and synthetic resin.