An assembled inner component of a tapered roller bearing, consisting of a cone (which provides a contact surface for the rolling elements of the bearing), a complement of tapered rollers (the rolling elements), and frequently a retainer (which spaces the rolling elements).
1.6250 inches nominal cone width, 2.1250 inches nominal bore diameter, steel overall material, 0.0312 inches nominal cone corner radius, afbma class 2 standard tolerance designation