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).
2.3125 inches nominal overall outside diameter, 1.2500 inches nominal bore diameter, steel overall material, 0.0400 inches nominal cone corner radius, 0.5937 inches nominal cone width