10401928 - Tweco Classic No. 4 MIG Gun, 400A, 12 ft, Lincoln Connection

Industrial Grade Tweco Classic No. 4 MIG Gun

The Tweco Classic No. 4 MIG Gun (SKU: 1040-1928) represents the industry standard for heavy-duty air-cooled MIG welding. Designed for professional fabrication environments, this gun is rated for 400 Amps at a 60% duty cycle when using CO2 shielding gas, making it capable of handling high-deposition welding applications with ease. The unit features a 12-foot cable assembly, providing a balance of reach and wire feed consistency suitable for bench work and medium-sized assembly jigs.

This specific configuration is outfitted with a Lincoln-style rear connection, ensuring seamless integration with compatible Lincoln Electric wire feeders and power sources without the need for additional adapters. The gun comes factory-setup for wire diameters ranging from 0.035 inches to 0.045 inches, covering the most common range for structural steel and heavy manufacturing. The internal cable construction utilizes high-quality copper stranding to minimize voltage drop and heat buildup, ensuring stable arc performance over long shifts.

Maintenance and consumable management are streamlined with the Classic No. 4 platform. It utilizes the widely available Tweco 14 Series contact tips, 24 Series gas nozzles, and 54 Series gas diffusers. The conductor tube is metal-jacketed, providing robust protection against impact and spatter adhesion. The mechanical connection between the conductor tube and the cable is designed to withstand the rigors of industrial use, reducing the risk of conductivity loss over time. For MRO professionals, the field-repairable nature of the Tweco Classic series significantly reduces downtime and total cost of ownership.

Key Technical Specifications:

• Amperage Rating: 400A @ 60% Duty Cycle (CO2)
• Cooling: Air Cooled
• Rear Connection: Lincoln Style
• Cable Length: 12 Feet (3.6 Meters)
• Wire Capacity: 0.035" - 0.045" (0.9mm - 1.2mm)