Abstract: An automatic wheel assembly mounting system, for use on a vehicular assembly line, in which an array of fastener members is prepared, corresponding in number and geometric pattern to the array of coacting fastener members on the vehicle hub and to the array of bolt holes on the wheel assembly; a wheel assembly is rotated at an orientation station to bring the bolt holes into angular registry with the arrayed fastener members; the wheel assembly and arrayed fastener members are brought together and moved in registry to a staging position adjacent to but spaced laterally from a vehicle hub positioned at the wheel assembly mounting station on the assembly line and the arrayed fastener members, wheel assembly, and hub are relatively rotated to move the arrayed fastener members, the bolt holes in the wheel assembly, and the coacting fastener members on the hub into angular registry with each other at the staging position; the wheel assembly and arrayed fastener members are thereafter moved laterally onto the hub a

Abstract: A welding unit of semi-automatic design for use in spot welding applications in which limited production volumes, low labor rates, and other cost-related factors negate the use of high production, fully automated units. The welding unit comprises two automatic feed GMA spot welding units disposed within a housing and parallel adjacent mountings which allow for fore-aft sliding movement relative to one another and having the weld heads projecting outwardly through the front face of the housing for contact with the work surface. Gear racks mounted in parallel face-to-face configuration on each weld head mounting, and pinion gear disposed between and in contact with the gear racks of each weld head, cooperate to translate fore or aft motion of one weld mount into opposite movement for the other. The assembly allows formation of an axially placed series of adjacent spot welds to be placed on a workpiece utilizing one unit.