43949SP - Tweco 400A MIG Gun, 15ft, Euro Connection, 1/16 Wire, Velocity Series

Heavy-Duty Industrial Performance

The Tweco 43949SP is a high-performance 400 Amp MIG gun designed for rigorous industrial environments. Engineered to handle high-amperage welding applications, this gun features a 60% duty cycle, making it ideal for structural steel, heavy fabrication, and manufacturing sectors. The 15-foot cable assembly offers significant reach, allowing operators to move freely around large workpieces without constantly repositioning the wire feeder.

Velocity Consumable System

At the heart of this MIG gun is the revolutionary Tweco Velocity consumable system. Unlike traditional designs, Velocity consumables feature threadless contact tips that seat into the gas diffuser with a solid copper-to-copper connection. This design maximizes electrical conductivity and heat dissipation, resulting in a cooler-running gun and significantly extended consumable life. The gas flow is also optimized to provide superior shielding coverage, reducing porosity and rework.

Compatibility and Setup

This specific configuration comes pre-set for 1/16-inch (1.6mm) welding wire, a common size for heavy-plate welding. It utilizes a Euro-Kwik rear connection, ensuring seamless compatibility with a wide range of European-style wire feeders and power sources. The robust cable construction resists kinking and abrasion, ensuring longevity even in harsh shop conditions. Whether replacing an existing gun or upgrading a welder, the Tweco 43949SP delivers reliable, consistent wire feeding and arc performance.