Installations, machines, apparatus and equipment for welding and cutting, namely, electric arc welding machines, plasma welding machines, laser welding machines and autogenous welding and cutting machines and equipment or electric welding and cutting torches; parts, adapted parts and fittings for the aforesaid goods, namely, electrode holders, gas nozzles, current contact tips, welding gas burner connections, protective gas connecting hoses, nozzle sets, gas diffusers, gas lenses, clamping sleeves, clamping sleeve housings, central connectors for protective gas connecting hoses with plugs and bushings and welding swirl rings or welding turbulence rings, back caps, welding electrodes, in particular tungsten and carbon electrodes, plasma electrodes, plasma nozzles, spirals and/or bores for soldering wire; wire feeding systems for welding and laser applications; apparatus for cutting soldering wire; suction apparatus for electric or gas welding and cutting; cleaning equipment and apparatus for welding torches and cutting torches, in particular blower outlets and spraying units for automated welding; tool changing systems for automated welding and cutting, in particular torch neck changing systems; mountings for burners, adjustment devices for robot welding and cutting burners; mechanical positioning aids for programming welding robots; gas economising equipment for welding and cutting equipment; gouging blowpipes and parts therefor for gouging, seam preparation and preparation of metals; mechanical abrading instruments, namely, machines for grinding welding electrodes; robot mountings, namely, robot mounting brackets and robot mounting arms specifically adapted for electric arc welding and cutting machines; condensate separators