Greases as Lubricants for Metal and Plastic-Lined Plain Bearings

Abstract

Compared with data on oil-lubricated plain bearing materials, very little has been published about the performance of conventional plain bearing materials with grease lubrication. This paper presents the results of wear tests on bushes as a guide for designers to the selection of suitable materials and types of grease. Marked differences were shown between the relative performance of different metals lubricated with grease compared with those lubricated with oil. Good mechanical and chemical stability are most important for greases used to lubricate plastic bearings. To stimulate constructive comment, a suggested ideal grease specification for plain bearings is mooted.