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10401105 - Tweco Classic 4 MIG Gun, 400A, 25ft, Tweco Connection, .035-.045 Wire

Packaging: pack of 1
$2,221.79/EA $1,611.41/pack of 1 only $1,611.41/EASave 27%

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OVERVIEW

The Legend Returns: Tweco Classic No. 4 MIG Gun

When you pick up a Tweco Classic No. 4 MIG Gun, you are holding a piece of welding history that is still the preferred choice for professional welders today. This isn't a plastic toy; it's a heavy-duty tool built for serious arc time. The 1040-1105 model delivers 400 amps of welding power with a massive 25-foot reach, giving you the freedom to weld large assemblies, trailers, and structural beams without being tethered too closely to your machine.

The "Classic" designation refers to the gun's traditional design, which prioritizes durability and heat management. The handle is shaped to fit comfortably in a gloved hand, providing a secure grip that reduces fatigue during long beads. The trigger is responsive and built to last millions of cycles. This gun comes set up for .035" and .045" wire, making it perfect for general fabrication and structural work right out of the box. The Tweco backend ensures a solid electrical connection to your feeder, minimizing voltage drop and ensuring a smooth, consistent arc.

One of the biggest advantages of the Tweco No. 4 is its simplicity. If you are out in the field or deep in a shop, you can't afford downtime. This gun is fully serviceable. You can change the liner, replace the trigger switch, or swap out the conductor tube in minutes. The heavy-duty steel spring guards prevent the cable from kinking at the stress points, and the air-cooled design means there are no coolant leaks to worry about. It’s just you, the gun, and the puddle.

Why Welders Choose the Classic No. 4:

  • Reliable Power: Handles 400 amps all day long without overheating.
  • Tough Build: Survives drops, drags, and sparks.
  • Easy Maintenance: Simple design allows for quick fixes and consumable changes.
  • Versatile Connection: Fits any feeder with a Tweco adapter.
Additional Information
Brand:Tweco
Amperage:400
Length:25 ft
Wire Size:0.035" - 0.045"
Back End:Tweco
Item:Accessory
Torch Type:MIG Gun (Air Cooled)
Cooling Method:Air Cooled
Duty Cycle:60% @ 400A
Connection Type:Tweco
Cable Length:25 ft
Wire Diameter:0.035", 0.045"
Applications:Heavy Equipment, Shipbuilding, Pipeline, Fabrication
Packaging Description:pack of 1

INCLUDED

  • 1 x Tweco Classic No. 4 MIG Gun (400A, 25 ft)
  • 1 x Contact Tip (.035"/.045" setup)
  • 1 x Nozzle
  • 1 x Diffuser
  • 1 x Liner (Pre-installed)
  • 1 x Tweco Backend Connection

APPLICATIONS

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

FAQ

The Tweco Classic No. 4 is rated at 400 Amps at a 60% duty cycle when using CO2 shielding gas.

This specific model (1040-1105) comes set up for .035" to .045" (0.9mm - 1.2mm) welding wire.

It features a standard Tweco backend connection (Tweco #4 style), which fits wire feeders equipped with a Tweco adapter.

Yes, the liner in the Tweco Classic No. 4 is fully replaceable. It uses standard Tweco 44 series liners.

It uses the industry-standard Tweco 14 Series contact tips, 24 Series nozzles, and 54 Series gas diffusers.

This model features a 25-foot (7.6 meter) cable assembly.

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

Yes, but you will need to install a nylon or Teflon liner and use aluminum-specific contact tips to prevent feeding issues.