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The LINCOLN ELECTRIC KP21T-50 is a fixed recessed MIG welder nozzle designed for water-cooled MIG welding guns. It directs shielding gas to the weld zone, protecting the molten pool from atmospheric contamination during the welding process. Rated for use in the 100 to 175 amp range, this nozzle is built for Lincoln Electric welding equipment. The recessed tip geometry positions the contact tip set back from the nozzle face, which helps reduce spatter buildup inside the nozzle bore and extends service intervals in higher-duty-cycle applications. Professional welders and fabrication shops installing or maintaining water-cooled MIG guns will find this a direct-fit service part.
This nozzle is intended for water-cooled MIG welding gun assemblies operating in the 100 to 175 amp range. Water-cooled guns are typically selected for higher-duty-cycle production welding environments where air-cooled guns would overheat. The fixed recessed design is common in semi-automatic and automated MIG setups where consistent gas coverage and reduced spatter interference are priorities. This part is specified for use with Lincoln Electric equipment per manufacturer data.
Specified for use with Lincoln Electric MIG welding equipment. No additional compatible model numbers or system families were provided in the product data. Verify fitment against your specific Lincoln Electric water-cooled MIG gun model before ordering.
Installation should be performed by a qualified welder or MIG gun service technician. Power down and disconnect the welding machine from its power source before servicing the gun assembly. Shut off and bleed the water cooling circuit before removing the existing nozzle to prevent coolant spillage. Hand-tighten the nozzle to the specified seating position and verify a secure, leak-free connection to the water-cooled gun body before resuming operation.
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