K4521-2-10-45 - Lincoln Magnum PRO 400 Water-Cooled MIG Gun, 10ft, 400A, Lincoln Connector

Unmatched Reliability for High-Heat Welding

Tackle your toughest welding jobs with the Lincoln Electric Magnum PRO 400 Water-Cooled MIG Gun. Rated for 400 amps at a 100% duty cycle with mixed gas, this gun is a powerhouse designed for high-heat applications where air-cooled guns simply can't keep up. The K4521-2-10-45 model features a 10-foot cable, providing ample reach for bench work and jig welding while minimizing cable clutter. Its water-cooled architecture ensures that the gun runs cool even during extended arcs, protecting both the internal components and the welder's hand from excessive heat.

Superior Consumable Life

Stop wasting money on frequent contact tip replacements. The Magnum PRO series utilizes Copper Plus contact tip technology, which provides a larger heat sink to draw thermal energy away from the wire interface. This results in significantly longer tip life and a more stable arc, even in pulsed MIG applications. The patent-pending anti-seize tip and diffuser thread design prevents parts from fusing together, making consumable changes quick and frustration-free. The heavy-duty nozzle is designed to withstand high radiant heat and resist spatter adhesion, keeping your gas flow smooth and laminar.

Comfort Meets Control

Welding all day requires tools that work with you, not against you. The Magnum PRO 400 features an ergonomic, over-molded handle that fits naturally in the hand, reducing grip force requirements and preventing slippage. The lightweight and flexible cable assembly reduces drag, allowing for precise torch manipulation. This attention to ergonomic detail helps reduce the risk of repetitive strain injuries and keeps productivity high throughout the shift.

Complete Package

This gun is ready to perform right out of the box. It includes the K466-10 connector kit for Lincoln feeders, a 45-degree gun tube for versatile access, and a full set of initial consumables including a .045" contact tip and liner. The liner provided is capable of handling wire diameters from .035" to .045", offering versatility for different project requirements. Invest in the Magnum PRO 400 for a welding gun that combines industrial durability, premium performance, and operator-centric design.