Study of Ball Bearing Torque Under Elastohydrodynamic Lubrication

[+] Author and Article Information
D. P. Townsend, E. V. Zaretsky

NASA-Lewis Research Center, Cleveland, Ohio

C. W. Allen

University of California, Chico, Calif.

J. of Lubrication Tech 96(4), 561-570 (Oct 01, 1974) (10 pages) doi:10.1115/1.3452491 History: Received July 09, 1973; Online October 18, 2010


Spinning and rolling torques were measured in an angular-contact ball bearing with and without a cage under several lubrication regimes in a modified NASA spinning torque apparatus. Two lubricants were used—a di-2 ethylhexyl sebacate and a synthetic paraffinic oil, at shaft speeds of 1000, 2000, and 3000 rpm and bearing loads from 45 newtons (10 lb) to 403 newtons (90 lb). An analytical model was developed from previous spinning friction models to include rolling with spinning under lubrication regimes from thin film to flooded conditions. The bearing torque values have a wide variation, under any condition of speed and load, depending on the amount of lubricant present in the bearing. The analytical model compared favorably with experimental results under several lubrication regimes.

Copyright © 1974 by ASME
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