An assembly consisting of a roller and stud used to effect a rolling contact with a cam, and convert the reciprocating or oscillating motion to linear motion.
mil-g-25013 mil spec single material response lubrication material document and classification, 3.2750 inches nominal overall length, 1.2700 inches minimum and 1.2900 inches maximum outer ring width, grease lubrication material, 2.0000 inches nominal overall outside diameter