bearing failures / bearing lubrication / bearing clearance / bearing tolerance
Bearing failures, lubrication, clearance and tolerances
A technical guide to common bearing failure drivers and the link between lubrication, clearance, tolerance and mounting.
Failure is rarely caused by one factor
Overload, poor lubrication, incorrect mounting, contamination and unsuitable clearance can combine to shorten bearing life. Failure analysis should be read together with catalog data.
Lubrication and temperature
The correct grease or oil reduces friction and protects contact surfaces. Too much or too little lubrication can increase temperature, leakage or early wear.
Clearance and tolerance
Fit, temperature difference and operating load affect internal clearance. Tolerance class should be evaluated with positioning accuracy and machine stability.
FAQ
What should be checked first after a bearing failure?
Load, lubrication, mounting marks, contamination and operating temperature should be checked together.
Can over-lubrication damage a bearing?
Yes. Too much lubricant can increase temperature and cause leakage or churning losses.