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RESEARCH PAPERS

An Experimental Evaluation of the Stresses in Drilled Balls

[+] Author and Article Information
L. J. Nypan

California State Univ., Northridge, Cal.

H. H. Coe, H. W. Scibbe

Lewis Research Center, Cleveland, Ohio

J. of Lubrication Tech 97(3), 533-537 (Jul 01, 1975) (5 pages) doi:10.1115/1.3452663 History: Received June 19, 1974; Online October 18, 2010

Abstract

Stresses in dimensionally similar large models of 40-, 50- and 60-percent mass reduction cylindrically hollow “drilled” bearing balls were experimentally evaluated with flat strain gage rosettes. Dimensionless principal stress coefficients were calculated and were applied to estimate the bending stresses in the drilled balls of three series of full-scale bearing experiments. Stresses were highest when the applied load approached the edge of the hole, and ranged up to almost 620 × 106 N/m2 (90,000 psi) at the bore.

Copyright © 1975 by ASME
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