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Matched set super precision bearings: Factors to consider

Closer Look At ABEC Standards, Other Basics To Provide Better Service

  • January 2008
  • Number of views: 2250
  • Article rating: No rating

Joe Wilkinson
Bartlett Bearing Company, Inc. 
Gastonia, North Carolina 

There are many reasons for the use of precision grade bearings. The selection of type and size are specific to the application. Some of the deter­mining factors are load ratings, both radial and axial, operating speeds, temperature and the degree of accu­racy during operation. 

Bearings are made to exacting toler­ances and are rated in various levels of accuracy. These standards were established by the Annular Bearing Engineers’ Committee (ABEC) for the American Bearing Manufacturers Asso­ciation which has been the benchmark in the industry since the early 1900s. 

The ABEC scale classifies differ­ent accuracy and tolerance ranges into classifications 1, 3, 5, 7 and 9. These classifications or grades are issued to a bearing after a series of vigorous measuring and testing procedures have been completed. 

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