... , universal joints, front wheeldrive, constant velocity joints water pump bearings, roller clutches, rollerizedcam lifters, rocker arms, cam rollers, starter drives and ... and lapped to surface finish of 0.020um Ra max.4) Alternative: surface finish of 0.025um Ra (max.) is available ... (flat underground ends)3) III-Type BPM (flat ground ends) 4*4mm Needle Roller