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ISO 9001:2000 Certified Quality Management System

How To Guide: Estimating Life Of Miniature And Instrument Ball Bearings

Posted By: Nancy Cogliandro, Marketing Director, PKB (Nancy, pacamor at msn dot com)   03/09/2016

 

How To Guide: Estimating Ball Bearing Life 
Pacamor Kubar Bearings (PKB) is continuing our HOW TO GUIDE series with some suggestions for estimating ball bearing life.  We hope this will help you to maximize bearing life and performance.
How To Guide: Estimating Life of Miniature and Instrument Ball Bearings

"Life" is the number of hours that a percentage of similar bearings have survived under an essentially identical set of operating conditions and loads.  Life can be affected by a number of factors including loads, speed, lubrication, fit, maintenance,temperature, contamination, and others.

Bearing life is defined as the length of time (number of revolutions) until a specific failure occurs. Predicting the life of a ball bearing is a statistical calculation of the fatigue properties of the various bearing components. Fatigue Life (L10 or Rating Life) of bearings is the number of hours or revolutions reached by 90% of a group of bearings subjected to the same loads before the onset of fatigue.  Conversely, 10% of the same group of bearings can be expected to show evidence of fatigue before the L10 Life is reached. 

Many variables can impact bearing life.  Various factors such as handling and contamination damage can dramatically reduce bearing life.  Bearings should be properly stored, mounted, dismounted, and inspected.  Optimized performance and life is also contingent on appropriate lubrication and sufficient protection from foreign matter.  Bearings should be stored in a cool, clean, low humidity environment free of dust, shocks and vibrations.  Proper fitting, using specialized tools and techniques, will also help maximize bearing life. 

Try our handy Life Load Calculator for bearings subjected to radial loads or combined radial and axial loads. Please contact us if the calculated life is borderline in comparison to the desired life or if the loading conditions differ from those presented. 

For further assistance with bearing selection and design, please feel free to contact our engineering team or look at our online catalog of standard bearings.  Catalog bearings, of all sizes produced by PKB, can be configured as Angular Contact, Radial, or Full Complement types.  PKB also manufactures a wide range of Thin Section and Metric bearings

 

For further assistance with bearing selection and design, please feel free to contact our engineering team or look at our online catalog.

 

See our Bearing Installation Guide Bearing Handling Practices pages for more information about proper handling installation of the PKB bearing into your device. Be sure to visit our Shaft and Housing Fits page for a detailed chart and more information about this topic.

Other Recent Blog Topics:
  • See our Shaft and Housing Fits page for a detailed chart and more information about this topic.
  • See our Bearing Handling Practices page for more information about proper handling installation of PKB bearing, for improved bearing performance and life. 
  • See our Bearing Installation Guide page for more information about proper handling installation of PKB bearings into your device. 
  • See our Ball Bearing Lubrication page for more information selecting the right lube for your application.

For further assistance with bearing selection and design, please feel free to contact our engineering team or look at our online catalog.


Read more: PKB Ball Bearing Life Estimator
Pacamor Kubar Bearings manufactures DFARS approved FAA TSO-C149 Aircraft Bearings in our ISO 9001:2008 & AS9100:2009 certified factory in Troy, NY.  

 

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