A cylindrical body having a centrally located hole to accommodate a pin or shaft for attachment to a push rod guide, yoke, rocker arm, turntable, or rail. The item provides a rolling contact with the face of a valve stem, or the lobes of a cam ring or camshaft on engines, fuel injection pumps, latches, turntables, parallel bearing surfaces requiring a roller support, and the like. Excludes:bearing, roller, cylindrical; roller, electrical switch; and friction bearings. See also cam follower, needle bearing.
0.500 inches minimum and 0.502 inches maximum bore inside diameter, not casehardened casehardening indicator, 1.000 inches nominal outside diameter, 0.469 inches nominal face width, sae 4140 assn std single material response material document and classification