KP4120-1-38F-B25 - Lincoln Magnum PRO Robotic Nozzle, Flush, 3/8 in, Water Cooled (25 Pack)

Technical Specifications and Fitment

The Lincoln Electric KP4120-1-38F-B25 is a 25-pack of thread-on gas nozzles designed for Magnum PRO Water-Cooled Robotic MIG guns. These nozzles are characterized by their 3/8-inch (9.5 mm) bore opening and a "Flush" tip relationship. In this configuration, the end of the contact tip sits flush with the end of the nozzle. This setup is often preferred for applications requiring a specific electrical stick-out (ESO) while maintaining close proximity to the weld pool for superior gas coverage. The 3/8-inch bore is relatively narrow, making it ideal for accessing tighter joints or corners where larger nozzles might cause interference.

Thermal management is a key feature of this component. Being designed for water-cooled torches, the nozzle geometry and material composition are optimized to handle the intense heat generated during high-amperage robotic welding. The thread-on base ensures a solid interface with the diffuser or torch neck, allowing for maximum thermal conductivity. This helps prevent the spatter adhesion and deformation that can occur with slip-on nozzles in high-heat environments. The secure threading also guarantees concentricity, ensuring the contact tip remains perfectly centered within the gas flow for a stable arc.

For welding operators and maintenance technicians managing robotic cells, the KP4120-1-38F-B25 offers a reliable solution for maintaining uptime. The consistent manufacturing tolerances of the Magnum PRO line mean that each nozzle in the pack will perform identically to the last, removing variables from your welding process. This pack size is ideal for crib stock, ensuring that replacement parts are always on hand for scheduled maintenance or unexpected replacements.