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).
0.7500 inches nominal cone width, 2.5000 inches minimum and 2.5005 inches maximum bore diameter, 0.0600 inches nominal cone corner radius, steel overall material, afbma class 2 standard tolerance designation