How to learn about different materials of bearing cage in 10 seconds?

Commonly used bearing cage is classified according to the type of material, mainly metal cages and non-metallic cages. There are also composite cages. Special purpose bearing cage should also meet the requirements of special working conditions. Such as high temperature, corrosion resistance, self-lubrication (used in a vacuum) or non-magnetic.

Steel bearing cage material 
Due to the characteristics of high strength, good toughness, and easy processing, steel cage materials are commonly used in rolling bearings. Often used 08 and 10 high-quality carbon steel sheet cold stamping. In addition, it can also be obtained by other mechanical processing methods as required. Commonly used steel cage materials are 20, 30, 45, 0Cr18Ni9, 1Cr18Ni9Ti, 40CrNiMo, ML15, ML20 and so on. Steel cages generally eliminate stress and restore plasticity through heat treatment. Including high-temperature tempering, recrystallization annealing. In order to reduce the friction coefficient of the steel cage, surface treatment of the cage must be performed if necessary.
Non-ferrous metal bearing cage materials
Different from steel, non-ferrous metals have their special properties. For example, aluminum alloys have characteristics of low density, good thermal conductivity, and good corrosion resistance; copper alloys have good thermal conductivity, low friction coefficient, good formability, and high operating temperature; Zinc and aluminum alloys have the advantages of low cost, low density and excellent performance.

Non-metallic cage material

Non-metallic bearing cage materials are mainly polymers and their composite materials, including nylon, phenolic adhesive, PTFE and so on. Polymer materials have good strength and elastic matching. The good sliding properties allow the polymer cage to generate only a small amount of friction when it is brought into relative motion with the surface of the lubricated rolling element, which minimizes heating and wear of the bearing. In the absence of lubricant, polymer cages still have excellent kinematic properties. It can be assured that the bearing will continue to run for a while without damage. Due to the lower density of the polymer, the cage made therefrom has less inertia.
In addition to pure bearing cage, cages also modify polymer materials. Use other materials for filling or enhanced use.

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