10401938 - Tweco Classic 4 MIG Gun, 400A, 12ft, Euro Connection

Heavy-Duty Tweco Classic No. 4 MIG Gun with Euro Connection

The Tweco Classic No. 4 MIG Gun (SKU: 1040-1938) represents the gold standard in air-cooled welding torches for heavy industrial applications. Designed to operate at 400 Amps with a 60% duty cycle, this gun is engineered to handle the rigorous demands of structural steel fabrication, heavy equipment manufacturing, and general industrial welding. The "Classic" series has earned its reputation through decades of reliable performance, offering welders a comfortable, balanced handle and a rugged cable assembly that resists cuts, burns, and abrasion.

This specific model features a 12-foot (3.7-meter) cable, providing ample reach for working around large assemblies while maintaining excellent wire feed characteristics. The shorter cable length compared to 15-foot models often results in smoother wire feeding, especially when using softer wires or larger diameters. The defining feature of this configuration is the Euro-Kwik connection. Unlike standard Tweco back-ends, the Euro connector allows this gun to plug directly into any wire feeder equipped with a European-style receptacle, making it a versatile upgrade or replacement for a wide variety of welding machines, including many ESAB, Lincoln, and Miller models with Euro adapters.

Maintenance is straightforward with the Classic No. 4. It utilizes widely available Tweco consumables, including the industry-standard 14 Series contact tips and 24 Series gas nozzles. The gun's modular design allows for easy replacement of the trigger, conductor tube, and cable liner, ensuring a long service life and low total cost of ownership. Whether you are welding mild steel, stainless steel, or flux-cored applications, the Tweco Classic No. 4 provides the consistent arc stability and durability required for high-quality welds.

Key Features

• High Amperage Output: Rated for 400 Amps at 60% duty cycle using CO2 gas.


• Euro Connection: Quick-disconnect Euro-Kwik back-end for universal compatibility with Euro-style feeders.


• Durable Construction: Heavy-duty handle and cable support system designed for harsh shop environments.


• Optimal Reach: 12-foot cable length balances reach with superior wire feed performance.