10401904 - Tweco Classic No. 4 MIG Gun, 400A, 15 ft, Tweco Connection

Tweco Classic No. 4 MIG Gun – 400 Amp, 15 Ft

Experience the rugged performance of the Tweco Classic No. 4 MIG Gun, the welding torch that defined the standard for air-cooled MIG welding. With the SKU 1040-1904, this gun offers a perfect balance of power, durability, and ease of use. It is engineered to operate at 400 Amps (60% duty cycle with CO2), making it ideal for flux-cored and solid wire applications in heavy industrial settings.

The gun features a 15-foot (4.6 meter) cable with a coaxial design that ensures excellent current transfer and wire feedability. The rear connection is the standard Tweco Style, which plugs directly into Tweco feeders or adapters on major power sources like Lincoln, Miller, and ESAB (with appropriate adapters). The "VDS" configuration typically denotes a heavy-duty setup ready for .035" to .045" wire sizes, perfect for structural welding and fabrication.

Operators appreciate the Classic No. 4 for its ergonomic curved handle and the reliable trigger mechanism, which has been tested to withstand millions of cycles. The gun's consumable system is perhaps its greatest strength; using the ubiquitous 14 Series tips and slip-on nozzles, inventory management for consumables is straightforward and cost-effective. Whether you are welding mild steel, stainless, or flux-core, the Tweco Classic No. 4 provides the arc stability and thermal management required for high-quality welds.

Specifications

• Amperage: 400 Amps (CO2) / 200 Amps (Mixed Gas)
• Duty Cycle: 60%
• Wire Size Capacity: Up to 5/64" (2.0mm) with proper liner/tip change; comes set for .035-.045".
• Cooling: Air Cooled
• Rear Connection: Tweco #4 Style