Bearing cage

Non-metallic cage materials mainly include polymers and their composites, including nylon, phenolic tape, polytetrafluoroethylene, etc. Polymer materials have good strength and elasticity matching. The good sliding performance makes the polymer cage produce only small friction when it moves relative to the surface of the lubricated rolling element, which can minimize the heat and wear of the bearing. In the absence of lubricant, the polymer cage still has excellent motion characteristics, which can ensure that the bearing will continue to run for a period of time without damage. Because of the low density of the polymer, the cage made of it has a small inertia.

In addition to being made of pure materials, the cage also modifies polymer materials and uses other materials for filling or strengthening.