255338 - Miller XR-Aluma-Pro Water-Cooled Head Tube 45-Degree

Miller 255338 Water-Cooled Gooseneck Assembly

Maintain the superior performance of your Miller push-pull welding system with the Miller 255338 Head Tube Assembly. This water-cooled gooseneck is an OEM replacement part for the XR-Aluma-Pro™ and XR-Pistol-Pro™ water-cooled MIG guns. When welding aluminum at high amperages, effective cooling is non-negotiable; this head tube ensures that coolant circulates effectively right down to the nozzle, protecting the front-end consumables and ensuring consistent wire feeding.

Technical Specifications

The assembly features a 45-degree bend angle and a 4-inch extension length. This configuration is widely favored for its versatility, allowing the welder to access fillet welds and corner joints comfortably. The water-cooled architecture is critical for heavy-duty fabrication where heat buildup can cause wire burn-back or premature failure of gas diffusers and tips. By using genuine Miller components, you ensure that the O-ring seals and electrical connections mate perfectly with the gun body, preventing coolant leaks and voltage drops.

Application and Maintenance

Over time, head tubes can become damaged due to accidental drops, thread wear, or internal coolant blockages. Installing a new 255338 assembly restores the gun's structural integrity and cooling capacity. This part is particularly vital for industries utilizing the XR-Aluma-Pro system for long, continuous welds on thick aluminum plate. The ability to rotate the head tube on the gun body further enhances its utility, allowing operators to customize the torch setup for specific fixture requirements or overhead work.

Why Choose Genuine Miller Parts?

Using aftermarket copies for complex water-cooled push-pull guns can lead to catastrophic leaks or electrical shorts. The Miller 255338 is manufactured to strict tolerances to handle the pressure of the cooling system and the thermal shock of the welding arc. It comes ready to install, ensuring your production line gets back up and running with minimal delay.