Bearing failure is a common problem during the operation of bearings, among which wear is a type of bearing failure, and wear also causes great damage to bearings. If only a few pieces are repaired, it will directly lead to bearing damage and failure. Based on my understanding of bearings, I would like to share several common forms of bearing wear. I hope that when you encounter wear during the use of bearings, you can make good repairs according to the specific wear forms.

1. Oxidative wear and tear. The small peaks and valleys on the surface of the bearing during relative motion are combined with oxidation in the air to form brittle oxides that are not firmly bonded to the base metal. These oxides are easily detached during friction, and the resulting wear is called oxidative wear.
2. Friction generates heat and wear. When bearings work under high-speed heavy loads and poor lubrication, high temperatures, decreased contact point hardness and wear resistance, and even adhesion and tearing phenomena occur at the peaks and valleys of the outer surface due to friction. This type of wear is called frictional heating wear.
3. Hard particle wear. If the bearings are in relative motion. The surface organization of the bearing during motion is uneven, with the presence of hard particles, or impurities such as sand, debris, and chips falling between the moving surfaces of the bearing. In relative motion, hard particles or impurities can cause scratches or even grooves on the surface of the bearing, and this type of wear is called hard particle wear.
4. Pitting corrosion and wear. The rolling contact surface of gear bearings is subjected to significant contact pressure periodically during the relative process. Over time, the metal surface experiences fatigue, resulting in small cracks and erosion on the bearing surface. This type of wear is called pitting wear.