Wear
| Damage Condition | Possible Causes | Countermeasures |
| Severe friction resulted in serious wear on the rolling contact surface of raceways. |
|
|
Wear 1
Part: Ball nut
Symptom: Serious wear due to severe friction
Cause: Severe wear developed because the grease was completely washed away from the ball nut when overhauling the ball screw
Wear 2
Part: Screw shaft
Symptom: Serious wear due to severe friction
Cause: Abnormal wear was caused because of fine iron contamination
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