Severe friction resulted in serious wear on the rolling contact surface of raceways.
Insufficient lubrication
Intrusion of contamination
Poor assemble accuracy (Misalignment)
Review the lubricant and lubrication method
Improve sealing capability
Take measures against misalignment
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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