S4015MC3CMC - Bernard BTB 400A MIG Gun 15ft Miller Style S-Series Handle

Industrial Grade Bernard BTB 400 Amp MIG Gun

The Bernard BTB (Best of the Best) MIG Gun platform is designed to meet the rigorous demands of industrial manufacturing and heavy fabrication. The S4015MC3CMC model is a 400 Amp, air-cooled MIG gun featuring a 15-foot cable and a direct Miller power pin connection. Built for durability and operator comfort, this gun consolidates the best features of legacy Bernard Q-Gun, S-Gun, and T-Gun lines into a single, highly reliable solution for professional welders.

At the heart of this gun is the renowned Centerfire consumable system. Unlike traditional threaded tips, the Centerfire contact tip drops into the diffuser and is locked in place by the nozzle, allowing for tool-free changes and better heat dissipation. This design significantly reduces downtime associated with burn-backs and consumable replacements. The tapered nozzle geometry ensures excellent gas coverage even in drafty shop environments, promoting high-quality welds with minimal porosity.

The S-Series handle included with this configuration is ergonomically designed to fit naturally in the welder's hand, reducing wrist strain during long shifts. The gun also features a rotatable neck, which can be adjusted without tools to reach difficult angles, further enhancing operator comfort and weld accessibility. The 15-foot cable assembly is reinforced with heavy-duty strain relief at both the front and back ends, protecting the internal power cable and liner from kinking and abrasion common in busy industrial settings.

Josef Gas recommends the Bernard BTB 400A gun for shops running Miller wire feeders that require a robust, high-duty cycle torch. Whether you are welding mild steel, stainless, or aluminum, the consistent wire feeding provided by the Universal Conventional Liner ensures stable arc performance. This gun is an investment in productivity, offering long service life and compatibility with widely available Bernard consumables.