Computing Core-Yield Limits for Case-Hardened Rolling Bearings

Abstract

Core yielding has been identified as a major source of premature failure in case-hardened ball and roller bearings. Design criteria have been established and accepted to prevent core-crushing failures in these bearings. Vendors have made substantial advances in understanding core yielding and in designing to prevent failures. However, the user is in need of a simplified, straightforward method of assuring himself that core failure will not occur. A simplified computational method is constructed from the established design criteria and presented. With minimal geometry information and a case-core specification, the core-yield limit, in terms of maximum allowable element load, can be computed for a given bearing. Numerous hand-calculation methods for arriving at maximum element loads from applied loads exist. In this manner, core-yield adequacy can be easily verified. A numerical example is presented. Presented at the 39th Annual Meeting in Chicago, Illinois, May 7–10, 1984