The specific reasons for the natural wear of the bearing are mainly as follows: the tiny peaks and valleys on the friction surface squeeze each other, causing the brittle surface to gradually fall off and wear.

Oxidation wear: The small peaks and valleys on the surface of the cylindrical roller bearing relative movement and the oxidation in the air form brittle oxides that are not firmly bonded to the base metal. The oxides are very easy to fall off during friction. The wear that occurs is called oxidation. Wear.

Friction and heat wear. When the bearing is working under high speed, heavy load and poor lubrication, the peaks and valleys of the outer surface will generate high temperature due to friction, the hardness and wear resistance of the contact points will decrease, and even adhesion and tearing will occur. This kind of wear is called For friction, heat and wear.

Hard particle wear: If the bearing is in relative motion. The surface of the bearing is uneven in structure, there are hard particles, or impurities such as sand, friction, and cutting chips fall into the surface of the bearing. During the relative movement of the bearing, the hard particles or impurities will scratch the surface of the bearing and even form grooves. This kind of wear is called hard particle wear. Automotive bearings

Pitting corrosion wear: Gears, bearings and other rolling contact surfaces are periodically subjected to large contact pressures during the relative process. After long-term action, fatigue occurs on the surface of the metal, causing micro cracks and denudation on the surface of the bearing. This type of wear is called Pitting wear.

Cause rust or corrosion, wear caused by chemical corrosion. The bearing surface is corroded by acid, alkali, salt liquid or harmful gas, which accelerates the wear process. This wear is called wear caused by chemical corrosion.

The metallographic structure or chemical composition of the metal changes, which reduces the wear resistance and hardness of the bearing surface and accelerates the wear process. This kind of wear is called wear caused by high temperature action, and wear caused by high temperature action. When the bearing is temporarily working at a high temperature. Due to temporary contact with water, acid, alkali, salt and other liquids or harmful gases, the non-moving bearings on the equipment will be corroded and damaged, resulting in rust or corrosion and damage, which is called corrosion damage.