Paper 8: Comparison of Accelerated Service Simulation Laboratory Tests for Rolling Elements

Abstract

Although the ultimate assessment of materials for rolling elements is performance in service, full-scale testing is both expensive and time-absorbing, and an accepted accelerated service-simulation laboratory test to screen potentially suitable materials would be desirable.

Using reference materials of known service performance, results obtained from the National Engineering Laboratory rolling four-ball test, a high-speed rolling four-ball test, and the washer-type Unisteel fatigue machine have been compared. Variables in the different test methods which may influence the results are discussed.