The effect of adding rape oil to mineral oil in a compounded axle-box lubricant was investigated, using critical temperature, friction, voltage discharge, and electrical resistance. The critical temperature was measured in a Bowden-Leben machine. The other quantities were determined by using a 1-in steel ball rubbing against 3 planes in a micro cup.
All these methods gave compatible results.
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ChuP. S. Y.CameronA.Trans. Amer. Soc. Lub. Eng. In the press.
