Effect of lubricant viscosity on rolling-contact fatigue life

Thomas L. Carter
Oct 1957

A series of rolling-contact fatigue tests was conducted in a bench rig developed at the NACA Lewis laboratory. Four paraffin-base mineral oils of varying viscosity (at atmospheric pressure) were used as lubricants. Ball specimens were AISI M-1 tool steel (air melt). Test temperature was 100 degrees F, and a calculated Hertz compressive stress lever of 725,000 psi was maintained.

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