K126-12 - Lincoln K126 PRO 350A Innershield Gun, 15ft, Tweco #4

The Industry Standard for Flux-Cored Welding

When it comes to structural steel and heavy-duty construction welding, the Lincoln Electric K126® PRO Innershield® Welding Gun stands as the undisputed industry standard. Known for its rugged reliability and comfortable ergonomics, the K126 PRO (K126-12) is the gun of choice for ironworkers and fabricators who refuse to compromise on performance. This 350-amp, air-cooled gun is designed to handle the heat and abuse of the toughest job sites while delivering consistent wire feeding for self-shielded flux-cored applications.

Built for the Pro, by the Pro
Lincoln Electric has taken a classic design and upgraded it with modern features that save you time and money. The "PRO" in the name signifies the inclusion of Magnum® PRO Copper Plus™ contact tips. These tips are designed with more copper to disperse heat faster, meaning they last longer and don't fuse as easily as standard tips. This translates to less downtime changing consumables and more time burning wire. Additionally, the new replaceable liner system allows you to refresh your wire path without replacing the entire cable assembly, a major cost-saving feature for high-volume users.

Rugged Construction for Harsh Environments
Welding in the field can be brutal on equipment. That's why the K126 PRO features a stainless steel gun tube jacket that shrugs off spatter and protects the internal components. The trigger leads are hidden safely inside the coaxial cable, protecting them from getting snagged on beams or cut by sharp edges. Even the strain relief is plated steel, ensuring your cable connection remains secure through constant movement and bending.

Ready to Work
The K126-12 comes equipped with a 15-foot cable and a Tweco® #4 connector, making it compatible with a vast array of feeders. It is set up out of the box for 5/64" wire but can easily be adapted for wires ranging from .035" to .120". Whether you are welding high-rise columns or heavy machinery, the K126 PRO provides the consistent arc and durability you need to get the job done right.