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).
0.5000 inches nominal cone corner radius, 0.7620 inches nominal cone width, steel overall material, afbma class 4 standard tolerance designation, 1.0000 inches nominal bore diameter