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Estimating Wear Of Installed Ball BearingsSimple inspection and measurement technique makes possible to estimate wear of balls in ball bearing, without removing bearing from shaft on which installed. To perform measurement, one observes bearing cage while turning shaft by hand to obtain integral number of cage rotations and to measure, to nearest 2 degrees, number of shaft rotations producing cage rotations. Ratio between numbers of cages and shaft rotations depends only on internal geometry of bearing and applied load. Changes in turns ratio reflect changes in internal geometry of bearing provided measurements made with similar bearing loads. By assuming all wear occurs on balls, one computes effective value for this wear from change in turns ratio.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Keba, John E.
(Rockwell International Corp.)
Mcvey, Scott E.
(Rockwell International Corp.)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Publication Information
Publication: NASA Tech Briefs
Volume: 17
Issue: 7
ISSN: 0145-319X
Subject Category
Report/Patent Number
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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