What is the effect of the deep bulge on the bearing spherical surface?

1. Wear: When tiny foreign matter enters the bearing, it may cause excessive wear on the bearing. For example, sand, metal particles produced during grinding and machining, and metal particles or carbides brought by gears will wear or grind rollers and raceways. This kind of wear will lead to the expansion of axial clearance or internal clearance, thus reducing the fatigue life of bearings and leading to bearing eccentricity.

2. Pitting and wear: Hard particles rolling in bearings will lead to pitting and wear of rollers and raceways. Improper cleaning of the bearing seat and residual metal fragments or large particles of dust will lead to premature fatigue damage.

3. Gully marks: Gully marks are extremely serious wear caused by debris or metal particles. These pollutants wedge into the soft cage material, resulting in gaps in the rolling components, which will affect the rolling contact geometry and reduce the service life of the bearing.

4. Debris pollution; External debris pollution is usually caused by dust, sand and environmental particles, while internal debris pollution is usually caused by improper cleaning of gears, splines, sealing rings, clutches, brakes, joints and bearing seats or damage or peeling of components. With the lubrication process, hard particles move in the bearing, which eventually leads to scratches (crushing) on the inner surface of the bearing. Indentation forms protrusions, which leads to surface stress concentration, premature damage of bearing surface and shortening the life of shaft.