The rings and rollers of rolling bearings are subjected to high contact pressure repeatedly, while rolling contact with sliding is carried out. The maintainer, on the one hand, slides in contact with both sides of the ring and the rolling body, or one side thereof, while being subjected to tension and contraction. Therefore, the information, performance and important requirements for bearing rings, rolling elements and maintenance racks are as follows.
Performance required by ring and rolling element data: performance required by rolling fatigue strength, hardness and high friction resistance elevated maintenance data: good dimensional stability, high mechanical strength, in addition, it also needs to be processed well. According to their different uses, they are also required to have good impact resistance, heat resistance and corrosion resistance.
Data of ring and rolling element: High carbon chromium bearing steel is usually used for ring and rolling element. For most bearings, SUJ2 in JIS steel is used. Large bearings use SUJ3. The chemical composition of SUJ2 has been standardized as data for sliding bearings in various countries of the world. For example, it belongs to the same kind of steel as AISL52100 (USA), DIN100Cr6 (West Germany), BS535A99 (UK).
In the case of impact resistance, chromium steel, chromium-molybdenum steel, nickel-chromium-molybdenum steel and carburizing quenching are used as bearing data to make the steel have a softening layer from appearance to proper depth. Carburized bearings with appropriate softening depth, fine structure, suitable hardness of the appearance and core hardness have excellent impact resistance than bearings using bearing steel, and the chemical composition of individual steel for carburized bearings.
NSK implements vacuum degassing, so the data used have high cleanliness, low oxygen content and good quality. Furthermore, appropriate thermal solutions are adopted to improve the rolling fatigue life of bearings.
In addition to the above steels, according to their special uses, high-speed steels with excellent heat resistance and stainless steel with good corrosion resistance are also used.
Maintenance data: Stamping Maintenance data, using low carbon steel. Brass and stainless steel plates are also used according to their different uses. The material of cutting maintenance frame is made of high strength brass, carbon steel and decomposition resin.
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