Steering axles on larger trucks are usually manufactured by a vendor who supplies axles to all manufacturers. The old Holllander books listed what would interchange. On an I beam axle, the only way to set the camber is by bending the axle. Alignment shops have anchors in the floor to chain the axle while they use a jack to bend it. Axles lose their camber with time. We have a jig in our shop to use a 100 ton press to put camber back into 25,000 lb trailer axles. When axles lose camber, they run the tread off on the inside.
