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Rolling-element fatigue life of AISI M-50 and 18-4-1 balls

Author
Zaretsky, E. V.
Published
Apr 1, 1978.
Physical Description
1 electronic document
Additional Creators
Parker, R. J.
Online Version

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Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
Rolling element fatigue studies were conducted with AISI M-50, EFR 18-4-1, and VAR 18-4-1. Groups of 12.7 mm (1/2-in) diameter balls of each material were tested in the five ball fatigue tester. Test conditions included a load of 1540 N (347 lbf) giving a maximum Hertz stress of 5520 MPa (800 000 psi), a shaft speed of 10,700 rpm, and a contact angle of 30 deg. Tests were run at a race temperature of 339 K (150 F) with a type 2 ester lubricant. The rolling element fatigue life of AISI M-50 was not significantly different from that of EFR 18-4-1 or VAR 18-4-1 based on a statistical comparison of the test results.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19780013530.
Accession ID: 78N21473.
NASA-TP-1202.
E-9350.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15729212