Publish Time: 2022-11-11 Origin: Site
Bearing cage, also known as bearing retainer, is one of the main parts of bearing. A bearing cage is a bearing part that is partially wrapped around all or part of the rolling body and moves with it to isolate the rolling body and usually guide the rolling body and keep it in the bearing.
When the rolling bearing is working, especially when the load is complex and the rotating speed is high, the cage should bear great centrifugal force, impact and vibration, there is great sliding friction between the cage and the rolling body, and a lot of heat is generated. The result of the combined action of force and heat will lead to cage failure, which will cause cage burn and fracture in serious cases, resulting in the bearing can not work normally.
Therefore, in addition to having a certain strength, the cage material must also have good thermal conductivity, small friction coefficient, good wear resistance, strong impact toughness, small density, and the expansion coefficient is close to the rolling body. In addition, the stamping cage needs to be subjected to more complex stamping deformation, but also requires the material to have good machining performance. Some of the most demanding cages have a layer of silver on them.
Similar to the expansion coefficient of the rolling body and good processing performance. In addition, the cage is also subject to chemical media, such as lubricants, lubricant additives, organic solvents and coolants.
Cages have four basic functions in rolling bearings:
1. Separate the rolling body;
2. Keep the rolling body itself or make it keep together with a ferrule;
3. Guide the rolling body to roll on the correct track;
4, the rolling body orientation, reduce friction.