10311633 - Tweco SEFC350 Flux Core Gun 15ft Lincoln Connection

Heavy-Duty Self-Shielded Flux Core Solution

The Tweco SEFC350 is a specialized welding gun engineered specifically for Self-Shielded Flux Cored Arc Welding (FCAW-S). Unlike standard MIG guns that are often adapted for flux core use, the SEFC series is built from the ground up to handle the intense heat, smoke, and spatter associated with open-arc flux cored welding. Rated at 350 Amps at a 60% duty cycle, this gun is a workhorse for structural steel erection, heavy equipment repair, and bridge fabrication.

This model features a 15-foot cable assembly, providing the necessary reach for field applications where the wire feeder cannot be placed immediately next to the weld joint. The rear connection is designed for direct compatibility with Lincoln Electric wire feeders, ensuring a secure and conductive fit without the need for adapters. The cable itself is constructed with high-grade copper and durable outer jacketing to resist cuts, abrasion, and burns common in heavy industrial environments.

Maintenance is simplified thanks to the use of standard Tweco consumables. The gun utilizes heavy-duty contact tips and liners designed to feed larger diameter cored wires smoothly, reducing bird-nesting and downtime. The lack of a gas nozzle—replaced by a thread protector or heat shield—improves visibility of the weld puddle, which is critical for maintaining quality in multi-pass structural welds. For professionals requiring a dedicated tool for FCAW-S, the Tweco SEFC350 delivers reliability and performance.