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Analysis of wear debris from full-scale bearing fatigue tests using the FerrographThe Ferrograph was used to determine the types of quantities of wear particles generated during full-scale bearing fatigue tests. Deep-groove ball bearings made from AISI 52100 steel were used. A MIL-L-23699 tetraester lubricant was used in a recirculating lubrication system containing a 49-micron absolute filter. Test conditions included a maximum Hertz stress of 2.4 GPa, a shaft speed of 15,000 rpm and a lubricant supply temperature of 74 C (165 F). Four fatigue failures were detected by accelerometers in this test set. In general, the Ferrograph was more sensitive (up to 23 h) in detecting spall initiation than either accelerometers or the normal spectrographic oil analysis (SOAP). Four particle types were observed: normal rubbing wear particles, spheres, nonferrous particles, and severe wear (spall) fragments.
Document ID
19800058997
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Jones, W. R., Jr.
(NASA Lewis Research Center Cleveland, OH, United States)
Loewenthal, S. H.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 10, 2013
Publication Date
May 1, 1980
Subject Category
Mechanical Engineering
Report/Patent Number
ASLE PREPRINT 80-AM-3E-2
Meeting Information
Meeting: Annual Meeting
Location: Anaheim, CA
Start Date: May 5, 1980
End Date: May 8, 1980
Sponsors: American Society of Lubrication Engineers
Accession Number
80A43167
Distribution Limits
Public
Copyright
Other

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