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).
4.1875 inches nominal bore diameter, 0.1406 inches nominal cone corner radius, afbma class 2 standard tolerance designation, steel overall material, 1.4375 inches nominal cone width