10401126 - Tweco Classic 4 MIG Gun, 400A, 20ft, Miller Backend

The Legend Returns: Tweco Classic No. 4

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 built the industry. This isn't just a torch; it's a workhorse designed for welders who burn wire all day, every day. This model (1040-1126) comes ready to rock with a direct Miller back-end connection, so you can plug it straight into your blue machine and get to work. No adapters, no hassle.

Reach Further, Weld Longer
With a 20-foot lead, you aren't tethered to your feeder. You can move around large jigs, climb over trailers, or reach across the shop floor without dragging your machine with you. The 400-amp rating means this gun can take the heat. Whether you are running spray transfer on heavy plate or short-circuit on structural frames, the Classic No. 4 stays cool in your hand thanks to its superior air-cooled design and heavy-duty copper construction.

Easy Maintenance, tough Build
We know that downtime kills paychecks. That's why the Classic 4 is designed to be fixed in the field. The consumables—tips, nozzles, and diffusers—are the standard Tweco parts you can find anywhere. The liner is easy to swap, and the trigger is built to last. The handle feels solid, giving you the grip and control you need for precision beads. If you want a gun that works as hard as you do, grab the Tweco Classic No. 4.