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.
sae 6115 assn std single material response overall material document and classification, 0.8820 inches minimum and 0.8860 inches maximum overall width, 3.0000 inches minimum and 3.0020 inches maximum outside diameter, 2.1250 inches nominal bore diameter, steel overall material