230242 - Miller 230242 Teflon Jump Liner for Aluminum Wire (.047-1/16 in)

Miller 230242 Teflon Neck Liner Overview

The Miller 230242 is a specialized Teflon liner designed for use in the neck assembly of compatible MIG guns, specifically tailored for feeding aluminum welding wire. Unlike standard steel liners, this component is manufactured from high-grade Teflon, a material chosen for its exceptionally low coefficient of friction. This characteristic is vital when feeding soft aluminum wires, such as 4043 or 5356 alloys, which are prone to micro-shaving, birdnesting, and deformation when subjected to the drag of a traditional metal coil liner.

This liner measures 6 inches in length, categorizing it as a "jump liner" or "neck liner." It resides in the gooseneck of the welding gun, bridging the gap between the main conduit liner and the contact tip. This specific positioning is where the wire path curves, creating the highest potential for friction. By utilizing the Miller 230242 in this critical section, operators ensure that the wire glides smoothly through the bend, maintaining consistent arc stability and wire speed.

The liner is engineered to accommodate wire diameters ranging from .047 inches (commonly referred to as 3/64") up to .062 inches (1/16"). It is an essential replacement part for maintaining the performance of Miller push-pull guns or standard guns equipped for aluminum applications. Proper maintenance of the neck liner is crucial; over time, even Teflon can wear or become clogged with aluminum shavings, necessitating replacement to prevent feed failures.