Pit & Quarry, April 2013
Prevent Bearing Failures Understand Conditions Causes and Counter Measures Recognize the reasons bearings fail and save costly downtime and lost productivity SEIZURE CONDITION Raceway is discolored and melted worn particles from the cage have attached to the raceway CAUSE Insufficient lubrication COUNTERMEASURE Check the lubricant and lubrication method CAGE DAMAGE www nskamericas com RUST AND CORROSION CONDITION Rust or corrosion on raceway rolling surface CAUSE Entry of water into lubricant COUNTERMEASURE Improve the sealing mechanism lubrication methods handling and storage CONDITION Deformation and fracture of the bearing cage CAUSE Abnormal load action on cage due to misaligned mounting large moment loads and or vibration sudden rotational speed changes temperature rise COUNTERMEASURE Check the mounting method operating temperature rotation and load conditions FLAKING CONDITION Flaking of only one raceway over its entire circumference CAUSE Excessive axial load COUNTERMEASURE Confirm bearing selection suitability for the application and check the load conditions MOUNTING FLAWS CONDITION Axial scratches on raceway rolling surface CAUSE Inclination of inner and outer rings during mounting COUNTERMEASURE Center the relative mating parts during mounting Ask for your FREE NSK Bearing Failure poster Learn more about failure causes and counter measures to understand why bearings fail and how to prevent them To request your copy go to www thinknsk com failureposter today
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