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).
duty class hh series special features, 0.3120 inches nominal cone corner radius, 2.2650 inches nominal cone width, steel overall material, 4.0000 inches nominal bore diameter