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, steel overall material, 0.0300 inches minimum and 0.0320 inches maximum overall width, 0.2520 inches minimum and 0.2620 inches maximum bore diameter, 0.6570 inches minimum and 0.6770 inches maximum outside diameter