Dry bearings: a survey of materials and factors affecting their performance

Abstract Following a general discussion of performance criteria and testing of dry bearings, the various materials currently available commercially are classified into four general groups - polymers, carbon-graphites, solid film lubricants and composites, and ceramics-cermets. The material properties relevant to bearings are discussed in detail for each group, and the special features required in design are noted. Finally, an attempt is made to develop a selection procedure for dry bearings, based on identifying the major requirements in a given application.