EVALUATION OF THE LIFE MARGIN OF OSCILLATING NEEDLE ROLLER BEARINGS.

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Abstract:

The life-margin of oscillating caged needle roller bearings is determined in an explicit non-statistical manner. Life-margin is the difference between the first macroscopic evidence of spalling fatigue and the end of useful bearing life. The bearings were life tested under service conditions closely duplicating those in helicopter rotor vertical and horizontal hinge pin locations. Author

Author(s):
Rumbarger, John H.
Author Organization(s):
FRANKLIN INST RESEARCH LABS PHILADELPHIA PA
Descriptive Note:
Final rept.,
Pagination:
0061

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
F-C2077
Contract/Grant Number(s):
N00156-67-C-2452
Project Number(s):
AVLABS-67-5-MIPR
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*HELICOPTER ROTORS, FAILURE(MECHANICS), LIFE EXPECTANCY(SERVICE LIFE), PERFORMANCE(ENGINEERING), OSCILLATION, MAINTENANCE, FATIGUE(MECHANICS), ENVIRONMENTAL TESTS
Field(s)/Group(s):
Helicopters, Machinery and Tools
Report Date:
1968 Feb 16