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Effects of surface removal on rolling-element fatigueThe Lundberg-Palmgren equation was modified to show the effect on rolling-element fatigue life of removing by grinding a portion of the stressed volume of the raceways of a rolling-element bearing. Results of this analysis show that depending on the amount of material removed, and depending on the initial running time of the bearing when material removal occurs, the 10-percent life of the reground bearings ranges from 74 to 100 percent of the 10-percent life of a brand new bearing. Three bearing types were selected for testing. A total of 250 bearings were reground. Of this matter, 30 bearings from each type were endurance tested to 1600 hr. No bearing failure occurred related to material removal. Two bearing failures occurred due to defective rolling elements and were typical of those which may occur in new bearings.
Document ID
19870009387
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Zaretsky, Erwin V. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
Mechanical Engineering
Report/Patent Number
NAS 1.15:88871
NASA-TM-88871
E-3231
Accession Number
87N18820
Funding Number(s)
PROJECT: RTOP 506-63-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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