10401101 - Tweco Classic 4 MIG Gun 400A 10ft Tweco Connection

The Legend in Your Hand: Tweco Classic No. 4

If you have been welding for any length of time, chances are you have held a Tweco Classic No. 4. It is the gun that built the modern fabrication industry. This 400-Amp, air-cooled workhorse is famous for being virtually indestructible and incredibly easy to fix. When you are burning wire all day on heavy plate or structural beams, you need a gun that doesn't overheat and doesn't quit. This model (10401101) comes with a 10-foot cable, giving you tight, responsive wire control that is perfect for booth work or jig welding where you don't want 15 feet of cable cluttering the floor.

Why Welders Love It:
It comes down to simplicity and reliability. The "paddle" style trigger is large and easy to operate even with thick welding gloves, and the handle shape is a classic for a reason—it just fits. The connection is a standard Tweco plug, meaning it slides right into most industrial feeders (like older Lincolns, Millers with adapters, or dedicated Tweco feeders). If you snag the cable or crush the liner, you can strip this gun down and rebuild it in minutes using parts found in almost every tool crib in the world.

Ready for Heavy Work:
Don't let the "Classic" name fool you; this isn't old technology, it's proven technology. The heavy copper conductors and high-quality insulation mean you get consistent arc transfer. It is set up to run standard .035" to .045" wires right out of the box but can handle up to 5/64" flux-cored wire with the right liner and tip changes. Whether you are running solid wire with mixed gas or flux-core with CO2, the Tweco Classic No. 4 delivers the current you need to lay down smooth, defect-free welds.

Key Benefits:

• Proven Durability: Built to survive drops, drags, and sparks.
• Easy Parts: Uses standard Tweco tips and nozzles you can find anywhere.
• High Power: 400 Amps of welding power for thick material.
• Short Reach: 10ft cable ensures the smoothest possible wire feeding.