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Damage Condition Possible Causes Countermeasures
The pitted surface has a dull luster which appears on the rolling element surface or raceway surface.
  • Debris becomes caught in the lubricant
  • Exposure to moisture in the atmosphere
  • Poor lubrication
  • Improve the sealing mechanism
  • Filter the lubrication oil thoroughly
  • Use a proper lubricant

 

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Pitting 1

Part: Outer ring of a slewing bearing
Symptom: Pitting on the raceway surface
Cause: Rust

Pitting 2

Part: Ball of damage “Pitting 1”
Symptom: Pitting on the rolling element surface

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New Bearing Doctor - Maintenance of Bearings

Handling & Maintenance, Performance, Inspection, Running Traces & Applied Loads, Bearing Damage & Countermeasures

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