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.
steel overall material, 0.0600 inches minimum and 0.0630 inches maximum overall width, 0.7200 inches minimum and 0.7400 inches maximum outside diameter, 0.3140 inches minimum and 0.3240 inches maximum bore diameter, flat race surface style designator