This paper is a continuation of Report No. 1 which was contributed by the Machine Design and Production Engineering Divisions and presented at the 1952 Annual Meeting. The investigation is principally concerned with the effects of higher bearing pressures than previously used on bearing performance, the effect of bearing roughness surface on coefficient of friction, and the effects of speed on coefficient of friction under otherwise constant conditions. In these tests the same bearings were used as for tests reported previously. These bearings and journals were made of straight tungsten carbide with 6 per cent cobalt as the binder.

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