Cam follower with roller for use with engine

摘要

A cam follower with a roller for use with an engine, the roller adapted for rolling contact with a cam on a camshaft. The roller is formed with minute recesses arranged in random directions so that an RMS(L)/RMS(C) ratio is not more than 1.0 wherein RMS(L) and RMS(C) are surface roughness root mean square values in the axial and circumferential directions, respectively. An SK value, another surface roughness parameter, should be not more than -1.6. This degree of roughness represents a higher surface roughness than prior art cam followers, provides greater oil retention and therefor better lubrication.