KP4523-1-50S - Lincoln Magnum PRO Water-Cooled MIG Nozzle 1/2 ID 1/8 Stickout

Industrial Grade Water-Cooled Performance

The Lincoln Electric KP4523-1-50S is a premium gas nozzle engineered for the rigorous demands of high-amperage industrial welding. Part of the renowned Magnum PRO series, this nozzle is specifically designed for use with Magnum PRO 400A and 500A water-cooled semi-automatic welding guns. In heavy fabrication environments where duty cycles are high and heat generation is intense, maintaining the integrity of the front-end consumables is critical for production efficiency. This nozzle addresses those challenges with a robust design and specialized materials.

Optimized Dimensions for Precision

This specific model features a 1/2-inch (12.7 mm) inner diameter (ID), which is a versatile size suitable for a wide range of wire diameters and shielding gas flow rates. The 1/2-inch bore strikes a balance between gas coverage and accessibility, allowing the welder to reach into standard joints without compromising atmospheric protection. Furthermore, the nozzle is designed with a 1/8-inch (3.2 mm) stickout. This configuration means the contact tip protrudes slightly beyond the nozzle edge, offering the operator enhanced visibility of the arc and the weld puddle. This is particularly advantageous for precision work or when welding in tight corners where seeing the wire placement is essential.

Nickel Plating for Durability

One of the standout features of the KP4523-1-50S is its high-quality nickel plating. Unlike bare copper nozzles that can rapidly accumulate spatter, the nickel finish provides a slick, hard surface that resists the adhesion of molten metal droplets. This resistance to spatter buildup significantly reduces the frequency of interruptions required for nozzle cleaning. For automated or high-volume manual welding operations, this translates to measurable gains in arc-on time and overall productivity. The plating also acts as a thermal barrier, reflecting radiant heat and helping to keep the nozzle cooler during extended welding sessions.

Seamless Compatibility

Designed to integrate perfectly with Lincoln's water-cooled goosenecks, this nozzle ensures efficient heat transfer away from the front end of the gun. The secure fitment prevents gas turbulence and leaks, ensuring a laminar flow of shielding gas that protects the molten weld pool from porosity and contamination. Whether used in heavy equipment manufacturing, structural steel, or shipbuilding, the KP4523-1-50S delivers the reliability and consistency professional fabricators expect from Lincoln Electric.