The rings and rolling elements of the rolling bearing are subjected to high contact pressure repeatedly while making rolling contact with sliding. The retainer is in sliding contact with the two sides of the ring and the rolling element, or one of the sides, and the other is subjected to tensile and contraction forces.
When further impact resistance is required, chromium steel, chromium-molybdenum steel, nickel-chromium-molybdenum steel is used as bearing materials, and carburizing and quenching are adopted to make the steel have a softened layer from the surface to the appropriate depth. Carburized bearings with proper softening depth, fine structure, proper hardness appearance and core hardness have better impact resistance than bearings using bearing steel, and the chemical composition of individual carburized bearing steels.
NSK has implemented a vacuum degassing solution, so the materials used have high purity, low oxygen content and good quality. Furthermore, appropriate thermal solutions have been adopted to significantly improve the rolling fatigue life of the bearing.
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.
Retaining frame data: stamping the retaining frame data, using low carbon steel. According to different uses, brass plates and stainless steel plates are also used. To cut the material of the cage, use high-strength brass, carbon steel, and also use decomposing resin.