Contrails
The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

A Study of the Influence of Lubricants on High-Speed Rolling-Contact Bearing Performance

Report Number: ASD TR 61-643
Author(s): Lewis B. Sibley, J. Clarence Bell, Jerrold W. Kannel, C. Malcolm Allen
Corporate Author: Battelle Memorial Institute
Laboratory: Directorate of Materials and Processes
Date of Publication: 1962-08
Pages: 59
Contract: AF 33(616)-7257
Project: 3044
Task: 30169
AD Number: AD0269512

Abstract:
Lubrication processes at rolling contacts are studied with a rolling-disk machine and X-ray system capable of measuring dynamic oil-film thickness and deformation at rolling contacts. Data are presented for a refined engine oil, a white mineral oil, and a polyphenyl ether over extended ranges of operating conditions. The measured minimum film thickness at rolling contacts transverse to the rolling direction with these lubricants, having bulk viscosities ranging from 6 to over 500 cp, varied from 3 to 100 microinches. For low-viscosity lubricants under moderate conditions of load, speed, and temperature, measured film thickness correlated well with elasto-hydrodynamic lubrication theory including elastic deformation of contact surfaces. Measured film thickness decreased significantly below theoretical under increasing load, speed, viscosity, and ambient temperature, by as much as a factor of 40. Elastic deformation tests at rolling contacts indicated that contact stresses were less severe for conditions of low load and high speed and with high-viscosity lubricants. A new theory of rolling contact lubrication was developed.

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