A rolling/sliding part

摘要

The rolling/sliding outer ring 23 of a cam follower apparatus is made to withstand peeling very well, even in severe lubrication conditions, by forming a surface layer in the depth 0 to 50 mu m from the outer peripheral surface of the outer ring, such surface layer having a maximum residual compressive stress between 50 and 110 kgf/mm<2>, a hardness between Hv 830 and Hv 960, and an amount of residual austenite at least 7 volume %. The surface is also formed with continuous minute irregularities with convexities of the irregularities having an equivalent roundness diameter up to 15 mu m for the case that the concavities of the irregularities are assumed to occupy 80% of the total surface area, while the inner peripheral surface of the outer ring is superfinished. The surface properties may be achieved by a two stage shot peening process.