Damage Condition
Corrosion on raceways and balls.
Possible Causes
- Intrusion of water or corrosive substance
- Inadequate lubricant
- Improper storage
Countermeasures
- Improve sealing function
- Change to higher anti-acid material or better surface treatment
- Review the lubrication system
- Review the storing condition
Corrosion at Ball Slider
Part: Ball slider
Symptom: Corrosion on raceways
Cause: Rusted raceways and balls caused by chlorinated cutting coolant penetrating the protective covers and attaching the ball slide
Corrosion at Balls
Part: Balls
Symptom: Corrosion on balls
Cause: Aggressive cutting coolant attacked the ball surface
Source: NSK
