In this paper, the numerous factors affecting the operation of plain bearings, principally crankshaft, main, and pin bearings, are considered, and the problems of bearing design, from the aspect of selection of the various materials which are combined in the construction of a bearing assembly, are discussed. An attempt is made to bring together conclusions reached by studying the factors referred to, and the performance of bearings in practice. The latter is based on a study in summary of the three kinds of bearing failure, namely, seizure, excessive wear, and mechanical breakdown. Comment on recent work by Lunn and by Roach is made, and a working hypothesis on the effective fatigue strength of a bearing lining is proposed.The MS. of this paper was received at the Institution on 6th October 1953. For the report of the meeting, on 8th December 1953, at which this paper was presented, see p. 145.
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