1. The internal structure of the bearing

The interior of a bearing is generally composed of an inner ring, an outer ring, rolling elements and a cage—usually called the four major parts. For sealed bearings, plus lubricant and sealing ring (or dust cover)—also known as the six major parts

Second, the working condition of the bearing

When the bearing is working (rotating at a certain speed), it has the ability to bear radial load or axial load.

When the bearing rotates at a certain speed, radial runout or axial runout will occur.

According to the working condition of the bearing:

Radial load Axial load Speed requirement Radial runout Axial runout

To choose different types of bearings, in order to better play the function of the bearings and prolong the service life of the bearings.

3. Bearing classification

Bearings are divided into ball bearings and

Ball bearing classification:

Deep groove ball bearings Angular contact ball bearings Self-aligning ball bearings Thrust ball bearings Thrust angular contact ball bearings

Classification of roller bearings:

Cylindrical roller bearings; needle roller bearings; tapered roller bearings; spherical roller bearings; thrust cylindrical roller bearings; thrust needle roller bearings; thrust tapered roller bearings; thrust spherical roller bearings