A series of bearings manufactured from two different materials and having various clearance and length diameter ratios has been tested on journals having various types of surface finish, using the machine and experimental technique described in Part I. The investigation was concerned mainly with the changes in performance which occur during running-in, and with the ultimate performance which is obtained, under conditions of thin film lubrication. Some tests have been made on the effect of a solid boundary lubricant (molybdenum disulphide).
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