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Development of a New Life Equation for Ball and Roller Bearings
Technical Paper
2000-01-2601
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The conventional rolling bearing life equation (1), which is based on the theory of Lundberg and Palmgren, has a problem in that it does not match the actual bearing life in all operating conditions. For instance, while the actual life of a bearing under clean lubrication is 20 times longer than the calculated life, actual life under contaminated lubrication is as low as one-tenth of the calculated life.
To solve this problem, the following life equation (Eq. 1: Advanced Bearing Life Equation) was developed with the aNSK life modification factor:
The new aNSK factor is based on data from bearing life aNSK tests involving over 450 roller bearings and over 550 ball bearings under a variety of operating conditions. The new life equation with the aNSK factor showed a satisfactory fit between calculated life and actual life.
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Citation
Takemura, H., Matsumoto, Y., and Murakami, Y., "Development of a New Life Equation for Ball and Roller Bearings," SAE Technical Paper 2000-01-2601, 2000, https://doi.org/10.4271/2000-01-2601.Also In
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