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An orbital weldhead having minimum thickness incorporates integral cooling and includes a nonconductive housing having a circular aperture for insertion and removal of the workpiece. A nonconductive self-lubricating race is mounted in the housing and surrounds the aperture, and an integral cover ada

An orbital weldhead having minimum thickness incorporates integral cooling and includes a nonconductive housing having a circular aperture for insertion and removal of the workpiece. A nonconductive self-lubricating race is mounted in the housing and surrounds the aperture, and an integral cover adapted to mate with the housing incorporates a nonconductive outer body and an electrode plate secured to the body adjacent the nonconductive race. The electrode plate includes a machined coolant flow channel engaging the nonconductive body of the cover to form a coolant flow channel surrounding the aperture.

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[ What is claimed is:] [1.] An orbital weldhead comprising:a nonconductive housing having a substantially circular workpiece aperture with an open bight portion for insertion and removal of a workpiece;a nonconductive self-lubricating race mounted in the housing, said race surrounding the workpiece

[ What is claimed is:] [1.] An orbital weldhead comprising:a nonconductive housing having a substantially circular workpiece aperture with an open bight portion for insertion and removal of a workpiece;a nonconductive self-lubricating race mounted in the housing, said race surrounding the workpiece aperture and having an coincident open bight portion;a integral cover adapted to mate with the housing with a coincident workpiece aperture and open bight portion and havinga nonconductive body and;an electrode plate secured to the body adjacent the race and having a coincident workpiece aperture and open bight portion, said electrode plate and body cooperatively forming a coolant flow channel surrounding the workpiece aperture;a rotor engaged intermediate the race and electrode plate and having an open bight portion aligning with the open bight portions of the housing, cover, race and electrode in a home position, said rotor supporting a welding cathode;means for rotating the rotor;means for introducing coolant into the coolant flow channel; andmeans for providing power to the electrode plate for welding.