Bearing cage has a great influence on the service performance and life of rolling bearing, and the selection of its material is particularly important. The cage material should have the characteristics of high mechanical strength, good wear resistance, good impact load resistance and dimensional stability.


Bearing cage is generally divided into stamping cage and solid cage.


Stamping cages for small and medium sized bearings are generally made of high quality carbon structural steel strip or plate, such as 08 or 10 steel. According to different uses, brass and stainless steel plates are also used.


Large bearings and small batch bearings generally use machine-made solid cages, which are made of brass, bronze, aluminum alloy and structural carbon steel.


The cage of precision angular contact ball bearing is usually made of phenolic laminated pipe.


In recent years, engineering plastic cages have been developed in China. The typical material is glass fiber reinforced polyamide 66 (grpa66-25). The working temperature is - 30 ℃ to + 120 ℃. The material has the advantages of light weight, low density, friction resistance, corrosion resistance, good elasticity, good sliding performance, easy direct injection molding and low manufacturing cost. It has been used to manufacture various bearing cages.


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