A rigid item usually circular in shape, designed to accommodate a bearing. It positions the bearing but does not encase it or restrain its motion.
flat race surface style designator, 2.1270 inches minimum and 2.1370 inches maximum bore diameter, 2.8450 inches minimum and 2.8650 inches maximum outside diameter, steel overall material, 0.1230 inches minimum and 0.1260 inches maximum overall width