10401903 - Tweco Classic 4 MIG Gun, 400A, 15ft, Tweco Connection

Tweco Classic 4: High-Performance 400A MIG Gun

The Tweco Classic No. 4 MIG Gun (Part #1040-1903) represents the pinnacle of traditional MIG torch design. Engineered for professional welders who demand reliability and performance, this air-cooled gun is rated at 400 Amps (60% duty cycle with CO2), making it suitable for a wide variety of heavy industrial applications. The "Classic" series has set the benchmark for MIG guns for over 40 years, offering a perfect balance of weight, durability, and serviceability.

This assembly includes a 15-foot cable with a Tweco-style rear connection, ensuring seamless integration with compatible wire feeders. The gun is factory-setup for .035" to .045" (0.9mm - 1.2mm) welding wire, covering the most common industrial wire sizes right out of the box. The conductor tube is swiveling and metal-jacketed, allowing for adjustment and providing robust protection against spatter and accidental drops.

Engineered for the Welder

The Classic 4 features a heavy-duty paddle trigger that is easy to operate even with thick welding gloves. The cable assembly uses high-quality copper stranding for efficient current transfer and flexibility. Maintenance is straightforward; the gun uses the industry-standard Tweco 14 Series contact tips, 24 Series nozzles, and 54 Series gas diffusers. This means you spend less time hunting for proprietary parts and more time welding.

Technical Highlights:

• Amperage Rating: 400A @ 60% Duty Cycle (CO2), 200A @ 60% (Mixed Gas).
• Cooling: Air-cooled design eliminates the need for water coolers.
• Wire Capacity: Can accommodate up to 5/64" (2.0mm) wire with liner changes.
• Construction: Impact-resistant handle and durable cable outer jacket.

Invest in the Tweco Classic 4 for a welding gun that delivers consistent results, weld after weld.