10401147 - Tweco No. 4 MIG Gun 400A 15ft Lincoln Connection

Reliable GMAW Solution for Lincoln Systems

The Tweco 1040-1147 No. 4 MIG Gun represents the gold standard for air-cooled semi-automatic welding. Engineered for high-amperage applications, this torch is rated at 400 Amps, making it suitable for a vast array of industrial welding processes using Gas Metal Arc Welding (GMAW) and Flux Cored Arc Welding (FCAW). This particular model is factory-fitted with a Lincoln backend connection, providing immediate compatibility with Lincoln wire feeders and power sources. This direct connection ensures optimal electrical conductivity and gas flow, which are critical for maintaining a stable arc and defect-free welds.

The 15-foot (approximately 5 meters) cable assembly provides the necessary flexibility for welders working on large-scale projects. The cable is constructed with high-quality copper stranding to minimize voltage drop, ensuring that the power set at the machine is delivered to the arc. The outer jacket is durable and resistant to the harsh conditions typical of welding environments, including exposure to sparks, spatter, and rough handling. The air-cooled design utilizes the shielding gas and ambient air to dissipate heat, providing a robust solution that is less complex and easier to maintain than water-cooled alternatives.

Out of the box, the 1040-1147 is set up for 1/16-inch (1.6mm) welding wire. This larger wire diameter capability is ideal for heavy fabrication where high deposition rates and deep penetration are required. The gun features Tweco's classic conductor tube and handle design, which has been refined over decades to offer superior balance and maneuverability. The trigger mechanism is tested for millions of cycles, ensuring reliable arc initiation every time.

Maintenance of the Tweco No. 4 is straightforward, utilizing the industry-standard Tweco consumable platform. This includes the widely used 14-series contact tips and adjustable gas nozzles, which allow the welder to fine-tune the nozzle-to-work distance. The conduit liner is easily replaceable, ensuring smooth wire feeding even with softer wires or after extended use. For professionals seeking a dependable, high-output MIG gun that integrates seamlessly with their Lincoln equipment, the Tweco No. 4 1040-1147 is the superior choice.