Rolling bearings are precision mechanical components that convert sliding friction between a rotating shaft and its seat into rolling friction, thereby reducing friction losses.

A rolling bearing generally consists of four components: an inner ring, an outer ring, rolling elements, and a cage.

The inner ring mates with the shaft and rotates with it;

The outer ring mates with the bearing seat and provides support.

The rolling elements are evenly distributed between the inner and outer rings by the cage. The cage's shape, size, and number directly impact the performance and life of the rolling bearing.

The cage ensures even distribution of the rolling elements, preventing them from falling out, guiding their rotation, and providing lubrication.