The inner component of a ball or roller bearing which provides a contact surface for the rolling elements of an antifriction bearing.
sae assn std all material responses overall material document and classification, 1.3745 inches minimum and 1.3750 inches maximum bore diameter, 1.2550 inches minimum and 1.2600 inches maximum overall width, straight bore shape, 1.6245 inches minimum and 1.6250 inches maximum overall outside diameter