What is the Relationship Between Bearing Material and Performance?

The choice of bearing material has a certain influence on bearing performance. the

The rings and rolling elements of sliding bearings are repeatedly subjected to high contact pressure while making rolling contact with sliding. The retainer is in sliding contact with both sides of the ferrule and rolling elements, or one of them, and bears tension and contraction force on the other side. Therefore, the material, performance and main requirements for the bearing rings, rolling elements and cages are as follows. The performance required by the ring and rolling element materials: high rolling fatigue strength, high hardness, high wear resistance

The performance required by the cage material: good dimensional stability and high mechanical strength

In addition, good processability is also required. According to different uses, it is also required to have good impact resistance, heat resistance and corrosion resistance. the

In the case where impact resistance is further required, chrome steel, chrome-molybdenum steel, and nickel-chrome-molybdenum steel are used as bearing materials, and carburizing and quenching are adopted to make the steel have a softened layer from the surface to an appropriate depth. Carburized bearings with proper softening depth, fine structure, suitable hardness surface and core hardness have better impact resistance than bearings using bearing steel, and the chemical composition of steel for general carburized bearings. the

NSK has 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 rolling fatigue life of the bearing. the

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

Cage material: The material of the stamping cage uses low carbon steel. Depending on the purpose, brass plates and stainless steel plates are also used. The material for cutting the cage uses high-strength brass, carbon steel, and synthetic resin.

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