10401916 - Tweco Classic 4 MIG Gun, 400A, 15ft, Miller Connection

Tweco Classic No. 4: 400A MIG Gun for Miller Feeders

Upgrade your welding setup with the legendary Tweco Classic No. 4 MIG Gun, configured specifically for Miller equipment. This 400-amp, air-cooled torch is the definition of industrial durability. Known simply as "The Number 4" in shops across the world, it sets the benchmark for high-amperage MIG welding. This assembly features a 15-foot cable and a Miller power pin, allowing you to connect directly to your Millermatic or Miller wire feeder without the need for adapters. It is the ideal choice for welders who refuse to compromise on reliability and prefer the feel of a traditional, heavy-duty tool.

The Classic No. 4 is built to last. It features a heavy-walled, armored cable design that protects the copper stranding and gas liner from crushing and impact damage. The metal-jacketed conductor tube is rotatable, allowing you to adjust the angle for better access into tight joints or difficult positions. One of the key advantages of this gun is its maintainability; the mechanical connection between the cable and the gun head is designed to be easily serviced with standard hand tools. This means if the cable gets damaged near the handle—a common failure point—it can be shortened and reconnected rather than discarding the entire gun.

This gun comes set up for standard steel welding applications, typically accommodating .035" to .045" (0.9mm - 1.2mm) wire diameters right out of the box. The efficient air-cooling design keeps the handle temperature comfortable even during extended welding sessions. By utilizing the industry-standard Tweco consumables, you benefit from a vast ecosystem of tip and nozzle options to suit any application, from spray transfer to short-circuit MIG. When you need a gun that works as hard as you do, reach for the Tweco Classic No. 4.