KP4120-1-50S - Lincoln Magnum PRO Robotic Nozzle, 1/2" Bore, Stick-Out, Thread-On

Maximize Uptime with Magnum PRO Consumables

For industrial welding operations relying on automation, the Lincoln Electric KP4120-1-50S Magnum PRO Gas Nozzle offers the durability and precision necessary to keep production lines moving. Designed exclusively for Magnum PRO Water-Cooled Robotic Torches, this consumable is built to withstand the intense heat and continuous operation typical of automotive and heavy fabrication sectors. When your robots are running around the clock, you need consumables that last longer and perform better, and the Magnum PRO line delivers exactly that.

The KP4120-1-50S features a 1/2-inch (12.7 mm) bore and a "Stick Out" tip relationship. This design choice is strategic for welders and programmers dealing with complex part geometries. Because the contact tip extends past the nozzle, the electrical stick-out (ESO) can be maintained even when the torch must reach into tight angles or deep fillet welds. This improves visibility for the operator during setup and ensures the arc is established exactly where it is needed. The stick-out design is often preferred for short-circuit transfer modes or when welding in positions that require the nozzle to be kept further back to prevent shorting against the workpiece.

One of the standout features of this nozzle is its thread-on connection. Unlike slip-on nozzles that can become loose due to thermal expansion and contraction, the thread-on style remains secure throughout the welding cycle. This security is vital for robotic tool center point (TCP) repeatability. If a nozzle shifts, it can affect gas coverage or even cause collisions. The threaded interface also maximizes the contact area between the nozzle and the torch neck, facilitating superior cooling. Efficient cooling keeps the nozzle surface temperature lower, which significantly reduces spatter adherence. Less spatter means less time spent on nozzle reaming cycles and more time spent welding.

Lincoln Electric's Magnum PRO consumables are synonymous with long life and reduced operating costs. By choosing the KP4120-1-50S, you are investing in a component that reduces changeover frequency. The robust construction resists deformation from accidental impacts and maintains its shape under thermal stress. For maintenance teams and welding engineers looking to optimize their robotic cells, this water-cooled, stick-out nozzle provides the reliability required to maintain high throughput and superior weld quality.