The main purpose of ball bearings and job requirements

- Nov 15, 2017 -

The main function of the bearing ball when it is used is to determine the relative position of the two parts and to ensure their free rotation, to some extent at the same time to transfer the load between them. At high rotational speeds, this use can be extended to include free rotation Bearing almost no wear.

In order to be able to achieve this condition, the bearing ball may be separated from the two pieces of the bearing by a layer of viscous fluid film called an elastomeric fluid-dynamic lubricating film in use, not only on the bearing shaft At load, the elastohydrodynamic lubricating film is retained when the bearings are preloaded so that their positioning accuracy and stability do not exceed 1 micro-inch or 1 nano-inch.

Bearing ball work requirements

1. Starter friction and work friction appropriate.

2 can withstand radial and axial joint load.

3. Not sensitive to the interruption of lubrication.

4. Self-excited instability phenomenon.

5. Low-temperature start easy.


Bearing balls are used in a variety of machines and equipment with rotating parts. Designers often have to decide whether ball bearings or fluid film bearings should be used in a particular application. Within a reasonable range, changing the load, speed and operating temperature has only a small effect on the ball bearing's good performance.