222464 - Miller Water-Cooled Head Tube 50° 6-Inch for Pistol Grip Guns

Restore Performance to Your Water-Cooled MIG Gun

Keep your production line moving and your welds clean with the Miller 222464 Head Tube Kit. If you are running a water-cooled pistol-grip gun—common in high-end aluminum welding setups like the XR series—you know that the head tube takes the brunt of the heat and abuse. Over time, threads can strip, internal coolant passages can clog, or the tube can simply become bent out of spec. This replacement kit allows you to swap out the damaged neck and restore your gun to factory-fresh performance.

Designed for Access and Comfort
Welding isn't always done on a flat bench. The 50-degree curve on this head tube is designed to help you navigate around complex parts and fixtures. It provides a natural angle of attack for fillet welds and groove welds, reducing the need for awkward body positioning. The 6-inch length is the standard "sweet spot" for general fabrication, giving you enough length to see the puddle clearly without making the gun front-heavy or unwieldy.

Why Water Cooling Matters
For welders pushing high wire feed speeds or working with thick materials, air-cooled guns just can't keep up. The Miller 222464 is fully water-cooled, circulating coolant all the way to the nozzle seat. This keeps the consumables cool, preventing the wire from burning back into the tip and reducing spatter adhesion. If you have noticed your gun getting uncomfortably hot or your consumables failing prematurely, a compromised head tube could be the culprit. Swapping it out with this genuine Miller part ensures your cooling loop is sealed and flowing correctly.

Installation and Fitment
This kit is designed as a direct replacement for the older Miller part number 130843. It installs easily into compatible pistol-grip handles. Always check your gun's manual to verify fitment, but if you are running a Miller water-cooled pistol setup requiring a 50-degree neck, this is likely the part you need to get back to burning wire.