Patent attributes
A tractor or trailer axle replacement spindle and seal ring assembly includes a spindle with an elongate cylindrical body having bearing surfaces and threads. The seal ring is a shorter cylindrical component having an opening sized to achieve an interference fit with the spindle. The exterior surface of the spindle and the interior surface of the ring seal include complementary oblique, shoulders bounded by regions of constant diameter. The spindle also includes a shoulder or flange at its end opposite the threads which positively axially locates the seal ring thereon. When the two components are to be assembled, the seal ring is heated to several hundred degrees Fahrenheit and slid onto the spindle until the seal ring contacts the shoulder or flange on the spindle.