10401939 - Tweco Classic 4 MIG Gun 400A 15ft Euro Connector

Tweco Classic No. 4 MIG Gun – The Industrial Standard

The Tweco Classic No. 4 MIG Gun (10401939) represents the pinnacle of durability and performance in the air-cooled welding gun market. For decades, the "Classic" series has been the go-to choice for professional welders in heavy fabrication, structural steel, and manufacturing. This specific model combines the legendary ruggedness of the Classic No. 4 platform with a Euro-Kwik connector, making it instantly compatible with a wide range of European and modern power sources that utilize this standard back-end connection.

Rated at 400 Amps at 60% duty cycle, this gun is built to handle high-amperage welding applications using CO2 or mixed gases. The 15-foot cable assembly offers significant reach, allowing welders to move freely around large workpieces without constantly repositioning the wire feeder. The cable itself is constructed with heavy-duty materials to resist cuts, burns, and abrasion common in harsh shop environments.

Velocity Consumables & Performance

This model is configured with Tweco's advanced Velocity (VX) consumables. Unlike traditional threaded tips, Velocity consumables feature a threadless, drop-in design that improves conductivity and arc stability while simplifying changeovers. The solid copper conductor path ensures efficient power transfer, reducing heat buildup in the handle and extending the life of the gun. The 60-degree conductor tube provides an optimal angle for accessing joints in various positions, reducing operator fatigue during long shifts.

Key Benefits for the Welder

• Proven Durability: The heavy-walled, high-impact handle is virtually indestructible, designed to survive drops and rough handling.


• Universal Compatibility: The Euro-Kwik connection allows this American-style gun to be used on machines from ESAB, Miller, Lincoln (with adapters), and other brands featuring Euro ports.


• Ease of Maintenance: Designed with the technician in mind, the gun features a simplified internal structure that makes liner changes and repairs quick and hassle-free.

Whether you are welding thick plate steel, pipe, or heavy machinery, the Tweco Classic No. 4 delivers the consistent arc and reliability required for code-quality welds. It is an investment in productivity that minimizes downtime and maximizes operator comfort.