Failures if rolling element bearing

Failures in rolling element bearings can occur due to several factors:

1. Fatigue: This is the most common failure mode. It occurs after a certain number of stress cycles, leading to material breakdown and spalling on the raceways or rolling elements.
2. Wear: This can be abrasive (due to contaminants), adhesive (due to metal-to-metal contact), or surface-fatigue wear.
3. Corrosion: Moisture or corrosive environments can cause rust and etching on bearing surfaces, weakening the material and leading to premature failure.
4. Lubrication Issues: Insufficient lubrication, incorrect lubricant type, or lubricant degradation can lead to increased friction, overheating, and rapid wear.
5. Overloading: Exceeding the bearing's load capacity can cause plastic deformation, brinelling (indentations), and accelerated fatigue.
6. Misalignment: Improper installation or shaft/housing misalignment can cause uneven load distribution, leading to stress concentrations and premature failure.
7. Contamination: Dirt, debris, or water entering the bearing can cause abrasive wear, corrosion, and lubricant breakdown.