258726 - Miller 15-Inch Jump Liner Assembly .030-.035 (5-Pack)

Reliable Wire Feeding with Miller Head Tube Liners

The Miller 258726 Head Tube Liner Assembly is a critical maintenance component designed to ensure the smooth delivery of welding wire through the neck of your MIG gun. This specific liner, often referred to as a "jump liner," is engineered to fit into the head tube assembly where the gun curves. This curvature creates the highest point of friction in the wire feeding path, making the liner susceptible to faster wear than the main conduit. By replacing this section independently, welders can restore optimal performance without needing to replace the entire gun liner system.

Designed for wire diameters ranging from .030" to .035", this liner provides the precise internal clearance necessary to prevent wire drag and micro-arcing inside the contact tip. It measures 15 inches in length, making it compatible with specific Miller MIG gun models that utilize a separate head tube liner configuration. Whether you are welding with solid steel wire or softer aluminum grades in a push-pull system, maintaining a fresh jump liner is essential for preventing birdnesting and erratic arc starts.

This product is supplied as a package of 5, offering excellent value for fabrication shops and industrial environments. Frequent inspection and replacement of the head tube liner are recommended, especially in high-duty cycle applications where heat and mechanical stress are prevalent. Trust genuine Miller Electric parts to maintain the integrity of your welding equipment and ensure consistent, high-quality welds.

Key Benefits

• Targeted Maintenance: Allows for the replacement of the high-wear neck liner without discarding the main cable liner.
• Smooth Feeding: Reduces friction in the gun bend, critical for soft wires like aluminum.
• Cost-Effective: The 5-pack quantity ensures you always have spares for quick changeovers.