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).
steel overall material, afbma class 2 standard tolerance designation, 0.3125 inches nominal cone corner radius, 2.2650 inches nominal cone width, 3.6250 inches nominal bore diameter