10401901 - Tweco Classic 4 MIG Gun, 400A, 10ft, Tweco Connection

Industry Standard 400A MIG Welding Gun

The Tweco Classic No. 4 MIG Gun (SKU: TWE1040-1901) represents the benchmark for air-cooled welding performance in heavy industrial environments. For decades, the "Classic" series has been the preferred choice for fabricators requiring a robust, high-amperage tool that can withstand the rigors of structural steel fabrication, heavy equipment manufacturing, and shipbuilding. This specific model features a 10-foot cable assembly, providing excellent wire feedability and operator control for bench work or confined spaces where longer cables might cause drag or feeding issues.

Rated at 400 Amps at a 60% duty cycle using CO2 gas, the Classic No. 4 is engineered to handle high-deposition welding with flux-cored or solid wires. The gun utilizes the widely available Tweco 14 Series contact tips, 54 Series gas diffusers, and 24 Series nozzles, ensuring that consumable management is cost-effective and logistically simple for procurement teams. The rear connection is a standard Tweco style, making it compatible with a vast array of wire feeders from major manufacturers like Lincoln Electric, Miller, and ESAB (with appropriate adapters if necessary, though native Tweco drives are common).

Maintenance personnel appreciate the Classic No. 4 for its serviceability. The handle design allows for quick access to the trigger mechanism and cable connections, reducing downtime during repairs. The coaxial cable design optimizes current transfer while maintaining flexibility, and the heavy-duty spring strain reliefs at both ends protect the copper stranding from fatigue and breakage. Whether for a production line or a job shop, this gun delivers consistent arc performance and proven reliability.

Key Technical Specifications

• Amperage Rating: 400A (CO2), 300A (Mixed Gas)
• Cable Length: 10 Feet (3 Meters)
• Wire Capacity: Up to 5/64" (2.0mm)
• Cooling: Air Cooled
• Connection: Tweco Style Rear Plug