Rolling by the outer ring, an inner ring, rolling elements and the cage is composed of four parts. Typically, the outer ring of the rolling bearing is mounted in the machine housing bore stationary, the inner ring is mounted on the shaft and the shaft is rotated together, and the rolling element is the inner scroll between the outer ring raceway, forming a rolling friction.
An outer ring: the outer ring is usually formed and the bearing or mechanical shell hole transition fit to play a supportive role.
The two inner rings: the inner ring is usually close coordination with the shaft axis operation.
Three rolling body: rolling element (ball, roller or needle) with the cage within the bearing is usually arranged evenly between the two rings for rolling motion, its shape, size and number of directly affecting the load bearing capacity and the Using performance.
4 Cage: Cage addition to be able to scroll outside the body evenly spaced, but also from the guide a rolling body rotation and improve the role of the the bearing internal lubrication performance.
The cage can be divided into five types: the wave-type cage crown-type cage, E-type cage, solid cage, daisy-type cage.
5 dust cover and seal: the rolling bearings composition in addition to the four major components, some bearing needed shields or seals.
The dust cover of the role is to let the external dust invade the bearing.


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