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.
not casehardened casehardening indicator, 3.865 inches minimum and 3.885 inches maximum face width, 0.406 inches minimum and 0.408 inches maximum bore inside diameter, 0.665 inches minimum and 0.685 inches maximum outside diameter, mil-s-6758,cond f,surface cond 4 mil spec single material response material document and classification