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Lubricant effects on bearing lifeLubricant considerations for rolling-element bearings have within the last two decades taken on added importance in the design and operation of mechanical systems. The phenomenon which limits the useful life of bearings is rolling-element or surface pitting fatigue. The elastohydrodynamic (EHD) film thickness which separates the ball or roller surface from those of the raceways of the bearing directly affects bearing life. Chemical additives added to the lubricant can also significantly affect bearings life and reliability. The interaction of these physical and chemical effects is important to the design engineer and user of these systems. Design methods and lubricant selection for rolling-element bearings are presented and discussed.
Document ID
19870006034
Document Type
Technical Memorandum (TM)
Authors
Zaretsky, Erwin V. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
December 1, 1986
Subject Category
MECHANICAL ENGINEERING
Report/Patent Number
E-3253
NASA-TM-88875
NAS 1.15:88875
Funding Number(s)
PROJECT: RTOP 505-63-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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