Abstract: A welding apparatus for welding a new stud on to the end of a broken-off stud which comprises a conventional mig welding hose through which inert gas can pass and through which a mig welding wire can be fed, the hose having a conventional extension at one end thereof for attachment of a mig welding nozzle thereto, the extension also having a longitudinally extending contact tip guide attached thereto and through which the welding wire passes, the nozzle having an enlarged cylindrical portion which is received over the extension of the hose, and a reduced cylindrical portion extending over and beyond the contact tip guide in concentric relation thereto. The mig welding hose has a trigger for initiating the flow of inert gas through the hose and into the annular area between the guide and the nozzle, for supplying a d.c. welding voltage and for feeding the wire through the hose and through the contact tip guide.

Abstract: A welding system for welding a new stud onto the end of a broken-off stud which comprises a welding gun having a forward end and a rear end, the forward end of the gun supporting a new stud to be welded to the end of a broken-off stud, the new stud being threaded at least along a rear portion thereof, a shroud mounted at the forward end of the gun and surrounding the new stud, the forward end of the new stud projecting outwardly from the gun into the shroud, the new stud having a longitudinal bore extending from the rear end thereof to a location adjacent to the forward end thereof where the bore flares outwardly to a larger bore at the forward end of the new stud, the new stud also being provided with slots at the forward end diametrically opposite from each other and in the region of the enlarged bore, a coated welding rod supported by the gun and extending from a location adjacent the rear of the gun through the bore in the new stud and to a point adjacent the forward end of the new stud, the welding rod h