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.
astm a582 or a581 type 303 assn std single material response overall material document and classification, 0.0625 inches minimum and 0.0635 inches maximum overall width, 0.1270 inches minimum and 0.1290 inches maximum bore diameter, steel comp 303 overall material, 0.2450 inches minimum and 0.2500 inches maximum outside diameter