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.
0.6270 inches minimum and 0.6370 inches maximum bore diameter, 1.0950 inches minimum and 1.1150 inches maximum outside diameter, 0.0600 inches minimum and 0.0630 inches maximum overall width, steel overall material, flat race surface style designator