SYMPOSIA PAPER Published: 01 January 1988

Failsafe Rating of Ball Bearing Components


Methods used traditionally throughout the bearing industry to calculate the life of rolling bearings predict a finite life under all conditions of application, even at very low contact stresses. More recently, endurance tests on heavily loaded 6309 deep-groove ball bearings have demonstrated that virtually infinite fatigue life is a practical reality for some applications, provided that bearings are accurately manufactured from high-quality steel. Accordingly, a new method to calculate rolling contact fatigue life has been developed in which an effective fatigue limit has been introduced. Metallographic and X-ray analysis of the highly stressed subsurface volumes of tested bearings have shown that a critical stress exists for a given material and test condition, below which microplastic deformation, transformation of retained austenite, and the development of residual stresses and texture do not take place, consistent with the concept of a fatigue limit.

Author Information

Voskamp, AP
SKF & Dormer Tools, Sheffield, England
Hollox, GE
SKF & Dormer Tools, Sheffield, England
Price: $25.00
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Developed by Committee: A01
Pages: 102–112
DOI: 10.1520/STP26229S
ISBN-EB: 978-0-8031-5056-0
ISBN-13: 978-0-8031-0999-5