K4651-040 - Lincoln Magnum PRO HyperFill Gun .040 Water Cooled FM

Revolutionary Twin-Wire Welding Performance

The Lincoln Electric K4651-040 HyperFill Semi-automatic 040 One-Pak FM represents a significant leap forward in heavy fabrication productivity. Designed specifically for the patented HyperFill process, this water-cooled MIG gun allows for the simultaneous feeding of two .040-inch (1.0 mm) wires through a single contact tip and nozzle. By combining two smaller diameter wires into a single arc cone, the system generates a larger weld puddle that is easy to control while delivering deposition rates comparable to much larger single wires or complex tandem setups. This specific configuration features a Fast-Mate (FM) backend, ensuring compatibility with wire feeders equipped with Euro-style connections.

Engineered for high-duty cycle industrial environments, the gun is rated for 500 amps at 100% duty cycle using CO2 or mixed shielding gases. The water-cooling system efficiently manages the intense heat generated by the twin-wire process, prolonging consumable life and maintaining operator comfort. The One-Pak configuration simplifies procurement by including the essential front-end consumables and liner pre-installed or boxed with the gun, allowing for immediate setup and integration into existing HyperFill-ready systems.

Technical Superiority

The core advantage of this system lies in its ability to utilize a single power source and a single modified wire feeder to drive two wires. The K4651-040 gun is the critical interface, merging these wires precisely at the contact point. This results in a wide, stable arc that excels at bridging gaps and providing deep penetration profiles without the excessive heat input often associated with trying to push a single large wire to its limit. The use of Magnum PRO consumables further enhances performance by utilizing Copper Plus technology for superior heat dissipation.