44-564-15 - Tweco Style 44-564-15 MIG Liner 15ft 5/64-Inch

Reliable Wire Feeding for Industrial MIG Applications

The Tweco Style 44-564-15 MIG Gun Liner is a critical component designed to restore and maintain the performance of your MIG welding equipment. Engineered to meet the rigorous demands of industrial fabrication, this liner serves as the conduit for the welding wire, guiding it from the wire feeder through the cable assembly to the contact tip. This specific model is a 44 Series liner, renowned for its compatibility and durability in medium to heavy-duty welding environments. It is manufactured to precise tolerances to ensure that 5/64-inch (approximately 2.0mm) welding wire feeds smoothly without binding or excessive friction, which are common causes of erratic arcs and birdnesting.

With a total length of 15 feet, this liner is perfectly sized for standard 15-foot MIG gun cable assemblies. It is constructed from high-grade, zinc-plated spring steel wire, wound tightly to provide both flexibility and structural integrity. This construction allows the liner to navigate the bends and curves of the welding cable while resisting kinking and crushing. The steel composition is ideal for feeding solid mild steel and flux-cored wires, providing a low-friction path that minimizes wear on the wire surface and reduces the load on the wire feeder motor. Proper liner maintenance is essential for consistent weld quality; a worn or clogged liner can lead to micro-arcing inside the cable, unstable wire feed speeds, and ultimately, weld defects.

This replacement liner is designed to be fully compatible with a wide range of popular MIG guns. It fits genuine Tweco No. 3 and No. 4 guns, as well as the Tweco Eliminator series (EL250, EL350, EL450) and the MS350 and MS450 models. Additionally, it serves as a suitable replacement for liners in Lincoln Magnum guns that utilize Tweco-style back ends and consumables. The liner comes ready to install, often requiring only simple trimming to match the exact length of your specific gun assembly. By choosing this high-quality aftermarket replacement (referencing OEM part 1440-1123), fabricators can ensure their equipment operates at peak efficiency, reducing downtime associated with wire feeding issues.

Installation is straightforward for maintenance personnel and welders alike. The liner features the standard connection geometry required for Tweco-style adapter blocks. Regular inspection of the liner is recommended; if you notice copper shavings, dirt accumulation, or increased resistance in the wire feed, it is time to replace the conduit. This 44-564-15 liner offers a cost-effective solution to extend the life of your MIG gun and improve the consistency of your welding operations.