Rolling Bearing

Rolling bearing is a kind of precise mechanical component that changes the sliding friction between the running shaft and the shaft seat into rolling friction, thereby reducing the friction loss.

Rolling Bearing

Rolling bearings generally consist of four parts: inner ring, outer ring, rolling element and cage.

The inner ring functions to cooperate with the shaft and rotate with the shaft;

The outer ring is matched with the bearing seat to support the bearing;

The rolling element distributes the rolling elements evenly between the inner ring and the outer ring by means of the cage.

Its shape size and quantity directly affect the performance and life of the rolling bearing;

The cage enables uniform distribution of the rolling elements and guides the rolling elements to rotate for lubrication.


Support the rotating shaft and the parts on the shaft, and maintain the normal working position and rotation accuracy of the shaft.

The rolling bearing is easy to use and maintain, reliable in operation, good in starting performance and high in carrying capacity at medium speed.

Compared with the sliding bearing, the radial dimension of the rolling bearing is large, the damping capacity is poor, the life at low speed is low, and the sound is loud.


  1. The outer ring – installed in the hole of the bearing housing and generally does not rotate.
  2. Inner ring – mounted on the journal, rotating with the shaft
  3. Rolling elements – the core components of rolling bearings
  4. Cage – evenly separate the rolling elements to avoid friction

Lubricant is also considered to be the fifth largest part of rolling bearings. It mainly functions as lubrication, cooling and cleaning.

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