When bearing ring null random of the bearing for the compressor which designates the

摘要

PROBLEM TO BE SOLVED: To provide a rolling and slide part to be hardly worn even when the part is used on a sever lubrication condition. ;SOLUTION: A random uneven surface is formed on a surface. A total sum of a sectional area of a protrusion part 3 cut by a plane 2 paralleling an outermost surface 1 is set to 70% or more of a area of the plane 2. This constitution locates an excellent oil film between the surface of a protrusion part having a wide occupation factor and a mating part over which a main rolling and slide part is rolled and slid at a stage wherein initial running in is completed. Further, a surface pressure is also low. Occurrence of wear is reduced through achievement of lubrication of a boundary.;COPYRIGHT: (C)1997,JPO