Failure form of rolling bearing

During the operation of the rolling bearing, abnormal heating, vibration and sudden increase of noise indicate that the imported rolling bearing may have been damaged, and the cause shall be checked and analyzed in time. Common failure forms include:
1. Fatigue spalling
On the raceway or rolling body surface of the rolling inlet bearing, the metal on the surface of the contact surface flakes off due to the alternating load, and gradually expands to form pits. If it continues to operate, a spalling area will be formed. Due to improper installation or the inclination of the center line between the bearing seat hole and the shaft, the local area of the bearing will bear a large load and appear early fatigue failure.
2. Crack and fracture
Material defects and improper heat treatment, too much interference, improper combination design, such as stress concentration caused by grooves on the bearing surface, will form ferrule cracks and fractures.
3. Indentation
When the external hard particles enter the bearing and are pressed between the rolling body and the raceway, the rolling surface can form an indentation. In addition, excessive impact load can also cause local plastic deformation on the contact surface and form pits. When the bearing is stationary, even if the load is very small, evenly distributed pits will be formed on the raceway due to the vibration of the surrounding environment.
4. Wear and tear
When the rolling bearing is not well sealed, dust or particulate matter enters the bearing, or poor lubrication will cause serious scratch or wear on the contact surface, and increase the vibration and noise of the bearing.
5. Current corrosion
When the current passes through the bearing, small electric sparks will be generated, resulting in local annealing of the contact surface and small pits or black bright spots. If the situation is serious, large pits will appear.
6. Rust
Water or acid, alkali, salt and other substances invade the bearing or improper selection of lubricant will lead to bearing corrosion. Even if the precision bearing is slightly rusted, the bearing will be scrapped.
7. Holder damaged
Rolling bearings, especially high-speed bearings, wear, collision and even fracture of cage at the contact between cage and rolling element or ring due to the lack of lubricant.