A: 1. Clearance change failure

During the operation of the rolling bearing, due to the influence of external or internal factors, the original fit bearing clearance is changed and the accuracy is reduced, which is called the clearance change failure.

2. Contact fatigue failure

Contact fatigue failure refers to the failure of bearing working surface subjected to alternating stress.

3. Wear failure

Wear failure refers to the failure caused by the continuous sliding wear of the metal on the working surface caused by the relative sliding friction between the surfaces.

4. Fracture failure

The main reasons for bearing fracture failure are defects and overload. When the applied load exceeds the material strength limit and the part breaks, it is called overload fracture. The cause of the overload is mainly the sudden failure of the host or improper installation.