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

Miller 255037 Head Tube Assembly Overview

The Miller 255037 is a specialized Head Tube Assembly designed to maintain the high-performance standards of Miller's professional-grade wire feeding systems. Engineered as a direct replacement component, this 4-inch, 45-degree tube head is compatible exclusively with the Miller Spoolmatic® Pro spoolgun, the air-cooled XR™-Pistol-Pro, and the XR™-Aluma-Pro push-pull guns. It serves as a critical interface between the welding gun body and the contact tip, directing the welding wire and shielding gas to the weld pool with precision.

Technically, the 255037 distinguishes itself with a user-centric design that prioritizes efficiency and ease of maintenance. The assembly features a fully rotatable connection that allows the operator to orient the head 360 degrees. This rotation capability is essential for accessing joints in varying positions without forcing the welder into uncomfortable or ergonomically poor postures. Furthermore, the head tube utilizes a self-seating connection mechanism. This engineering choice eliminates the need for external tools, adapters, or locking nuts during installation or removal. The result is a secure, leak-free connection for both current transfer and gas flow that can be established or changed out in seconds on the shop floor.

Constructed to withstand the thermal stresses of air-cooled MIG welding, the tube head maintains structural integrity and conductivity over prolonged use. The 45-degree bend angle is the industry standard for general fabrication, offering a balanced combination of reach and visibility. By utilizing genuine Miller components like the 255037, operators ensure that their Pro series equipment continues to operate within factory specifications, maintaining arc stability and wire feed consistency, particularly when working with softer aluminum wires often associated with Spoolmatic and XR systems.