The Lubrication of Bearings at High Temperatures

HIGH TEMPERATURE LUBRICATION, in terms of conventional usage, includes typical applications such as the diesel engine, the roll neck bearings of steel rolling mills or the cylinders of steam engines using superheated steam. This was certainly the case immediately prior to the second world war when, for example, Nash and Bowen, refer merely to the influence of high temperature on oil viscosity, the development of acidity and the formation of carbon. At that time King and Jakeman developed a test machine where, at constant pressure, one of the criteria used for oil evaluation was the seizing temperature ; the highest temperature recorded being of the order of 550°F.