Special Lubrication Problems for Bearings Running at High Speed

Abstract: Generally the conditions of EHD lubrication working conditions are accomplished at the level of the contacts between the rolling bodies and the ring races of the bearings. At the level of the contacts between the cage and the rolling frames, the lubrication systems vary among large limits (limited, mixed, EHD or HD conditions), while at the contacts between the cage and the guiding level the mixed or HD lubrication conditions prevail. This paper presents the theoretical and experimental importance of studying the thickness of the lubricant film and proposes methods of determining it. The diminished quantity of lubricant generates the phenomenon which determines the reduction of the film’s thickness.