Welder spindle head for the automatic or partially automatic welding of circular or partially circular weld seams on the basis of the MIG/MAG method incorporates a rotatable hollow shaft in a casing from which a structural member projects which serves as a mounting for the workpiece to be welded and/or is constructed as a receptacle for the workpiece. The spindle head has small dimensions and is reliable in operation in ensuring a continuous supply of energy to the torch tip.
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