On Kerosene Lubrication of Hybrid Ball Bearings

Abstract

The hybrid ball bearings with silicon nitride balls are employed in special applications, e.g. high-speed machine tools and aeronautics. The kerosene can be used not only as a fuel for the jet engine, but also as lubricant for its various mechanisms. The paper presents a short review of the previous research on kerosene lubricated rolling bearings - emphasizing the kerosene properties. A theoretical friction model for the estimation of the friction moment in kerosene-mist lubricated ball bearings is proposed. For the 7206C face-to-face mounted hybrid ball bearings lubricated by kerosene mist accelerated tests were carried-out at different speeds and loads, the monitored parameters being the friction moment and the developed temperature. Theoretical and experimental results on the friction moment developed in hybrid ball bearings with silicon nitride balls lubricated by kerosene mist are also presented herein.