255037 - Miller 4-Inch 45-Degree Gooseneck for Spoolmatic Pro and XR-Pro

Get the Right Angle with the Miller 255037 Head Tube

When you are in the middle of a tough fabrication job, the flexibility of your equipment can make or break your productivity. The Miller 255037 Head Tube Assembly is designed to give you that extra edge when using Miller's premium aluminum welding guns. This is the standard 4-inch, 45-degree gooseneck that fits the Spoolmatic Pro, XR-Pistol-Pro, and XR-Aluma-Pro air-cooled guns. Whether you are replacing a damaged neck or configuring a gun for a specific task, this genuine Miller part ensures your setup runs smoothly.

Tool-Free Adjustments

One of the biggest frustrations with traditional MIG guns is the hassle of changing or adjusting the neck. Miller solved this with the Pro series design. The 255037 head tube requires absolutely no tools to install. You simply plug it in, and it self-seats for a perfect connection. Even better, it is fully rotatable. If you find yourself welding a vertical-up joint or reaching around a gusset, you can rotate the tube 360 degrees to find the most comfortable hand position. This reduces wrist strain and helps you lay down better beads by keeping your gun angle consistent.

Built for Aluminum Welding

Since this head tube fits the XR-Aluma-Pro and Spoolmatic Pro, it is often used in aluminum fabrication environments where feeding reliability is paramount. The internal geometry is designed to guide the liner and wire smoothly, minimizing drag that can cause bird-nesting with soft aluminum wires. The 4-inch length puts you close enough to the work for excellent puddle control while keeping your hands away from the radiant heat of the arc. It is a robust, air-cooled component that stands up to the daily grind of industrial manufacturing, boat building, and trailer fabrication.