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Damage Condition Possible Causes Countermeasures
Pits like spot corrosion on balls and raceways.
  • Caused by an electric current, creating sparks through a thin oil film, between the contact points of the raceways and balls while a linear guide was in operation (Electric potential difference between a rail and a ball slide)
  • Provide an electric circuit so that the current does not pass through the linear guides

 

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Electrolytic Corrosion

Part: Electrolytic corrosions on a raceway of rail
Symptom: Worn black pits
Cause: Sparks due to an electric current between rail and a ball slide

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