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The Modified Life Rating of Rolling Bearings - A Criterion for Gearbox Design and Reliability Optimization

14FTM16

This The concepts of rolling bearing rating life and basic load rating (load carrying capacity) were introduced by Arvid Palmgren in 1937 [1]. At that time, until the 1950s, most bearing manufacturers listed in their catalogues the load admissible on the bearing for thousands hours of operation at five different speeds. In those days the selection of a bearing size for a given application was a rather simple and approximate matter.
The concept of a single rating factor to characterize the dynamic capacity of the bearing was new and initially used only within the bearing company that developed this new technology. This rating method was backed by the theory of Lundberg & Palmgren (L-P) [2] and by the Weibull statistics [3]. It was found that it could provide a correct interpretation of the many series of endurance tests available at the time, [2], [4], [5]. This calculation method prevailed on all the others methods used at the time and was adopted by ISO in 1962.
ISBN: 978-1-61481-108-4 Pages: 16
Authors: A. Doyer, A. Gabelli, G. Morales-Espejel
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