KP4121-1-62S - Magnum PRO Robotic Water-Cooled Nozzle, 5/8 in, Stickout

Lincoln Electric KP4121-1-62S Magnum PRO Bottleneck Gas Nozzle

The Lincoln Electric KP4121-1-62S is a premium gas nozzle engineered specifically for the rigorous demands of automated welding environments. Part of the renowned Magnum PRO series, this nozzle is designed to interface seamlessly with Magnum PRO Water-Cooled Robotic Torches. In high-production robotic cells, thermal management and consumable longevity are critical to maintaining uptime and weld quality. This nozzle addresses these needs with a robust construction capable of withstanding the intense heat cycles associated with water-cooled applications.

This specific model features a bottleneck design, which tapers towards the outlet. This geometry is essential for robotic arms that need to access tight corners or complex fixture geometries where a standard cylindrical nozzle might cause interference. The 0.625-inch (15.9 mm) bore diameter provides a substantial gas shield, ensuring adequate coverage of the weld pool even at higher travel speeds often utilized in automation. The "Stick Out" designation indicates that when installed, the contact tip will protrude slightly beyond the nozzle edge (or the nozzle is recessed relative to the tip, depending on the specific setup reference), which is often preferred for specific joint configurations to improve visibility or arc characteristics.

The thread-on connection mechanism is a key feature of the Magnum PRO line. Unlike slip-on nozzles that can become loose due to thermal expansion and contraction, the thread-on design ensures a mechanically secure fit. This tight interface also promotes superior heat transfer from the nozzle to the water-cooled torch body, helping to keep the nozzle cooler and reducing the adherence of spatter. By maintaining lower operating temperatures, the service life of the nozzle is significantly extended, reducing the frequency of tool changeovers and maintenance interventions.

Industries relying on heavy fabrication, automotive manufacturing, and structural steel automation will find the KP4121-1-62S to be a reliable component in their welding ecosystem. It is compatible with standard Magnum PRO expendables, allowing for streamlined inventory management. Whether welding mild steel, stainless, or aluminum, ensuring you have the correct nozzle geometry and cooling capacity is paramount for defect-free welds.