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