An analytical model describing the in-plane motions of a bearing cage is developed for angular contact bearings operating in the EHD lubrication regime. The ball-cage impacts are treated as impulse forces imparted to the cage. The model is developed on the basis that during ball-cage impact, energy is transmitted to the cage at the ball-cage interface by friction, whereas, cage energy is dissipated at the ball-race interfaces as a result of the ball being caused to translate along its EHD film by the cage. Numerical computations using the model indicate that the level of ball-cage friction, lubricant viscosity, and extent of ball-race lubrication are significant factors in determining the conditions for which the cage motions may be stable or unstable. The predicted trends concerning the stability of the cage motions conform qualitatively to observed experimental results.

The paper presents a comprehensive analysis of misaligned journal bearings. The equations are valid for finite bearings containing grooves at any angular position in which the misalignment can vary in magnitude as well as in direction with respect to the bearing's boundaries. The relevant equations, the method of solution, and a set of results for the case of L/D = 1 are presented. Charts are offered for a number of additional cases which bring out some of the salient features of grooved bearing misalignment. Downloaded From: http://tribology.asmedigitalcollection.asme.org/ on 05/15/2015 Terms of Use: http://asme.org/terms where and , • = -2(1 + 6) + (A0) 2 fu

The paper offers a method of including variable viscosity in bearing analysis by the use of a simple energy equation uncoupled from the Reynolds equation. The relevant adiabatic solutions are made independent of the specifics of the kind of lubricant used and of its initial conditions. Performance results such as load, friction, maximum temperature, flow, etc. are given for the two axial-groove journal bearing covering three L/D ratios, three values of the adiabatic parameter E, and the full range of eccentricities. The effect of variable viscosity on the performance of misaligned bearings is also examined.

A model of hydrodynamically lubricated cold rolling including thermal and pressure effects on the lubricant is developed in this paper. The hydrodynamic film thickness is calculated as well as the work zone pressure and shear stress distribution for several conditions assuming that the lubricant behaves as a Newtonian fluid. Pressure measurements made with vapor-deposited thin-film transducers on the roll surface are used for experimental comparison.

In the above paper all tabulated values of h should be divided by two.