BEARING

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
REPRESENTATIVE BEARING FAILURES . . . . . . . . . . . . . . . . 2
FAILURE SIGNS AND DIAGNOSIS
FOR REUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
• Outer race
• Inner race
• Balls (or rollers) and cage
FAILURES AND THEIR CAUSES . . . . . . . . . . . . . . . . . . . . . . 28
• Failure times and their causes
• Erroneous bearing selection
• Improper handling and installation of bearings
• Parts failures other than bearings
• Failures due to lubricant
• Faulty sealing units
BEARING BASICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
• Types of bearings
• Nomenclature
• Bearing characteristics
• Bearing lubrication
• Bearing service life
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . 36

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