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10401688 - Tweco Classic 4 MIG Gun, 400A, 15ft, Miller Connection

Packaging: pack of 1
$2,005.13/EA $1,454.28/pack of 1 only $1,454.28/EASave 27%

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OVERVIEW

The Legend: Tweco Classic 4 for Miller

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 an extension of your arm. When you're burning wire all day on heavy plate, you need a gun that balances weight with rugged durability, and the Classic 4 delivers exactly that. This model (10401688) comes ready to rock with a direct Miller connection, so you can plug it straight into your blue feeder and get to work immediately.

Why Welders Love It:
It’s all about the feel and the reliability. The handle shape is iconic—it fits the hand perfectly, reducing fatigue during those long beads. The paddle switch is responsive and tough enough to handle being dropped, dragged, and abused. Plus, with a 15-foot lead, you aren't tethered right next to the machine; you've got the freedom to move around your workpiece. The 400-amp rating means this gun doesn't get hot in your hand the second you crank up the voltage. It stays cool, letting you focus on the puddle, not the heat coming off the handle.

Maintenance Made Easy:
We all know things happen in the shop. Liners get kinked, tips burn back. The beauty of the Tweco Classic series is simplicity. You can strip this gun down and rebuild it on a tailgate or a workbench in minutes. It uses standard Tweco consumables—14 series tips and 24 series nozzles—stuff you can find in almost any tool crib or welding supply shop. No proprietary nonsense, just solid, reliable parts that keep you welding.

Whether you are running solid wire with gas or pushing heavy flux-core, the Tweco Classic No. 4 is the workhorse that won't let you down. It’s built for the welder who demands performance and durability day in and day out.

Additional Information
Brand:Tweco
Amperage:400
Length:15 ft
Back End:Miller
Wire Size:0.035" - 0.045"
Torch Type:MIG Gun, Air Cooled
Duty Cycle:60% @ 400A (CO2), 60% @ 200A (Mixed Gas)
Cooling Method:Air Cooled
Handle Style:Classic, Paddle Switch
Consumable Series:14 Series Tips, 24 Series Nozzles, 54 Series Diffusers
Packaging Description:pack of 1

INCLUDED

  • 1x Tweco Classic No. 4 MIG Gun (400A)
  • 1x 15 ft. Cable Assembly
  • 1x Miller Style Rear Connection
  • 1x Standard Consumable Setup (.035-.045)
  • 1x Owner's Manual

APPLICATIONS

  • Structural Steel Fabrication
  • Heavy Equipment Manufacturing
  • Shipbuilding and Offshore
  • General Industrial Fabrication
  • Pipeline Welding
  • Railcar Construction

FAQ

It uses standard Tweco consumables: 14 Series contact tips, 24 Series nozzles, and 54 Series gas diffusers.

The Tweco Classic No. 4 is an air-cooled MIG gun.

Yes, this specific model (10401688) comes with a Miller backend connection designed to fit most Miller wire feeders and machines.

It is rated at 400 Amps at 60% duty cycle when using CO2 gas.

Yes, the gun is capable of running Flux Core wires. You may need to ensure you have the correct liner and drive rolls for the specific wire type and diameter.

This model comes with a 15-foot cable assembly.

It comes configured for .035" to .045" wire diameters.

Yes, the liner is easily replaceable. The standard liner part number usually depends on the wire size, such as the 44 series liners.