KP4120-1-38R - Lincoln Electric Magnum PRO Robotic Nozzle .375 Recessed Water-Cooled

Lincoln Electric KP4120-1-38R Magnum PRO Gas Nozzle Overview

The Lincoln Electric KP4120-1-38R is a specialized gas nozzle engineered for the rigorous demands of automated welding environments. Part of the renowned Magnum PRO series, this nozzle is specifically designed for use with Magnum PRO Water-Cooled Robotic Torches. In high-volume manufacturing and heavy fabrication, robotic systems often operate at high duty cycles and amperages, generating significant heat. This water-cooled nozzle is constructed to manage these thermal loads effectively, ensuring consistent performance and prolonging the lifespan of the front-end consumables.

This particular model features a .375-inch (9.5 mm) bore diameter, which provides a focused gas shield ideal for specific joint configurations and wire diameters commonly used in automation. The nozzle utilizes a thread-on connection mechanism. Unlike slip-on nozzles, the thread-on design ensures a mechanically secure fit that resists loosening due to vibration or thermal expansion and contraction. Furthermore, the threaded interface maximizes the contact area between the nozzle and the torch neck or diffuser, facilitating superior heat transfer away from the nozzle tip and into the water-cooled torch body.

The tip relationship for the KP4120-1-38R is recessed. A recessed contact tip configuration is often preferred in applications where the nozzle needs to be closer to the work piece or when using higher voltages where a longer stick-out is beneficial for arc characteristics. By recessing the contact tip within the nozzle, the tip is also better protected from direct spatter accumulation and radiant heat, reducing the frequency of tip changes and downtime in automated cells.

Lincoln Electric's Magnum PRO consumables are built with Copper Plus technology or similar high-grade materials to resist spatter adhesion and erosion. This nozzle is an essential component for maintaining the precision and reliability expected from Lincoln Electric robotic welding systems. It is sold individually and is a direct replacement for existing Magnum PRO robotic setups requiring a 3/8" recessed nozzle.