Film thickness in miniature ball bearing grease lubricated

In this paper the authors theoretically evaluated film thickness in a miniature angular contact ball bearing grease and oil lubricated conditions correlated with variation of electrical resistance experimentally determined by using tribometer CETR UMT-2. For considering base viscosity. The rotational speed inner race varied between 1 500 rpm axial load applied on 7000C was 8.1 N. IVR EHD lubrication regimes were analytically depending lubricants for both outer race. Based dependence obtained real grease. case condition, experimental results showed an increase caused increasing according to theoretical model. ”a V-shaped pattern” obtained. High values at very low speeds observed. By decreases until limit continuum over limit. This behaviour also reported literature ball-disc interferometry that thickener is dominant generating thickness.