S4015MS3EEC - Bernard BTB 400 Amp MIG Gun, 15ft, .045, Miller Back End

Industrial Grade Bernard BTB MIG Gun - 400A Configuration

The Bernard S4015MS3EEC is a premium air-cooled MIG gun from the renowned BTB (Best of the Best) Semi-Automatic Air-Cooled MIG Gun platform. Engineered for industrial environments, this 400-amp model is designed to deliver consistent performance in high-demand welding applications. The gun features a 15-foot cable assembly, providing ample reach for maneuvering around large workpieces without compromising wire feedability. It comes pre-configured with a Miller-style power pin, ensuring direct compatibility with a wide range of Miller wire feeders and power sources.

At the core of this gun's performance is the Centerfire™ consumable system. The contact tip is drop-in and threadless, which prevents cross-threading and allows for quick changeovers. The nozzle features a built-in spatter shield that smooths gas flow and protects the diffuser. This specific configuration is set up for 0.045-inch (1.2 mm) welding wire, a standard size for structural and heavy fabrication tasks. The gun utilizes a rotatable neck design (depending on specific sub-configuration) and a curved handle that aligns with the natural grip of the welder's hand, significantly reducing wrist strain and fatigue over long shifts.

Durability is a hallmark of the Bernard brand. The cable is reinforced with a heavy-duty outer jacket that resists cuts, burns, and abrasion common in shop environments. The connection points are protected by sturdy strain reliefs that prevent kinking and wire liner damage. This gun is rated for 100% duty cycle with CO2 gas and 60% with mixed gases, making it a reliable workhorse for continuous welding operations. Whether used in manufacturing, shipbuilding, or heavy equipment repair, the Bernard 400A gun offers a robust solution for professional welders requiring precision and longevity.