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).
1.8750 inches nominal bore diameter, 1.2910 inches nominal cone width, 0.0310 inches nominal cone corner radius, steel overall material, extra capacity and increased complement of rollers and modified retainer special features