K3423-2 - Magnum PRO AL G450W Water-Cooled Push-Pull Gun, 25ft, 7-Pin

Industrial Precision for Aluminum Fabrication

The Lincoln Electric Magnum PRO AL G450W (K3423-2) represents the pinnacle of push-pull wire feeding technology, specifically engineered to address the inherent challenges of feeding soft aluminum wire over long distances. This water-cooled gun is rated for 450 amperes at 100% duty cycle using mixed shielding gases, making it a robust solution for heavy-industrial manufacturing environments where thermal management and continuous operation are critical. The system utilizes a high-torque assist motor located in the handle to pull the wire from the feeder while the feeder pushes, synchronizing the feed rate to eliminate friction-induced drag and prevent buckling or "birdnesting" within the liner.

Mechanically, the G450W integrates seamlessly with Lincoln Electric's advanced power sources via a 7-pin Amphenol connector. The 25-foot (7.6 meter) cable assembly provides significant operational radius without compromising wire feed stability. The gun features Lincoln's proprietary Magnum PRO consumables, specifically the Copper Plus contact tips, which offer a larger mass and superior heat dissipation properties compared to standard tips. This results in extended consumable life and reduced downtime for tip changes. The water-cooling circuit is designed for maximum thermal efficiency, circulating coolant directly to the nozzle and contact tip area to maintain conductivity and prevent overheating during high-amperage spray transfer welding.

The ergonomic design includes a front trigger configuration, preferred in many industrial settings for its tactile response and ease of actuation. The handle housing is constructed from high-impact, heat-resistant polymers designed to withstand the rigors of the shop floor. Maintenance is streamlined with tool-less drive roll changes and a flip-top drive roll cover, allowing operators to clear jams or inspect the feed mechanism rapidly. The internal gas and water lines are reinforced to prevent kinking, ensuring consistent shielding gas coverage and coolant flow regardless of the gun's orientation.