10401902 - Tweco Classic No. 4 MIG Gun, 400 Amp, 12 ft, Tweco Connection

The Legend You Trust

If you've been in the welding game for any amount of time, you know the Tweco Classic No. 4. It’s the gun that set the standard. When you pick up this 400-amp beast, you aren't just holding a torch; you're holding a piece of welding history that is built to take a beating. This model (1040-1902) comes with a 12-foot cable, giving you enough slack to move around your workpiece without getting tangled in excess hose, ensuring your wire feeds smooth and steady every time you pull the trigger.

Built for the Grind
We know that shop floors aren't gentle places. That's why the Classic 4 features a high-impact handle and a metal-jacketed neck. Drop it, drag it, or accidentally step on it—this gun keeps on firing. The air-cooled design uses heavy copper stranding to keep the heat in the arc and away from your hand, so you can stay comfortable even when you're burning wire at high amperages all day long. The trigger action is crisp and reliable, designed to minimize finger fatigue during those long beads.

Easy Maintenance, Less Downtime
Nothing is worse than a gun that's a nightmare to fix. The Tweco Classic 4 is famous for being welder-friendly. You don't need a degree in engineering to swap out a liner or change a contact tip. The nozzle slips on and off easily, and the contact tips (the standard 14 series you likely already have in your box) are durable and conductive. If you ever snag the cable, the mechanical connections mean you can often fix it right there on the bench instead of throwing the whole gun in the trash.

Whether you are welding structural beams, fixing heavy machinery, or fabricating custom parts, the Tweco Classic No. 4 gives you the power and reliability you need to lay down perfect welds, shift after shift.