KP4120-1-38S - Lincoln Electric Magnum PRO Water-Cooled Gas Nozzle, Stick Out, 3/8 Inch Bore

Optimized Performance for Robotic Welding Automation

The Lincoln Electric KP4120-1-38S Magnum PRO Gas Nozzle is a critical component designed to meet the rigorous demands of automated welding environments. Specifically engineered for use with Magnum PRO Water-Cooled Robotic Torches, this nozzle represents the intersection of durability and precision. In the world of robotic manufacturing, downtime is the enemy; therefore, utilizing high-quality expendables like the KP4120-1-38S is essential for maintaining continuous production flow and ensuring consistent weld quality across thousands of cycles.

This particular model features a "Stick Out" configuration. In MIG welding, the relationship between the gas nozzle and the contact tip is crucial. A stick-out nozzle is designed so that the contact tip protrudes slightly beyond the end of the nozzle. This geometry is often preferred in robotic applications where the torch must access tight corners or deep fillets, allowing the arc to reach the root of the joint without the nozzle body obstructing the path. It also facilitates specific arc characteristics desirable in certain transfer modes, ensuring that the electrical stick-out is maintained at an optimal length for the programmed parameters.

With a 0.375-inch (9.5 mm) bore diameter, this nozzle provides a focused column of shielding gas, which is particularly effective for standard wire diameters used in precision fabrication. The narrower bore helps in reducing gas turbulence and ensures that the weld pool is adequately protected from atmospheric contamination, even when welding at higher travel speeds typical of robotics. The water-cooled design is a standout feature, enabling the nozzle to withstand the intense reflected heat generated during high-amperage, high-duty-cycle welding. By actively dissipating heat, the nozzle resists spatter adhesion and deformation, significantly extending the lifespan of the consumable compared to air-cooled alternatives.

Installation is straightforward and secure thanks to the thread-on connection. Unlike slip-on nozzles that can loosen over time due to thermal cycling or vibration, the threaded interface ensures the nozzle remains concentric to the contact tip and firmly attached to the diffuser. This mechanical stability is vital for maintaining the Tool Center Point (TCP) in robotic programming, ensuring that the robot's path remains accurate over time. Trust Lincoln Electric's Magnum PRO line to deliver the reliability your automated systems require.