14501125 - Tweco 45-5/64-25 Steel Conduit Liner, 1/16" - 5/64", 25ft

Reliable Wire Feeding for Heavy Fabrication

The Tweco 1450-1125 (45-5/64-25) MIG Conduit Liner is an essential component for welders operating heavy-duty MIG guns over long distances. Designed specifically for 1/16" to 5/64" (1.6mm - 2.0mm) welding wires, this liner ensures that your filler metal feeds smoothly from the feeder to the contact tip, minimizing downtime caused by feed issues.

With a generous 25-foot length, this liner is perfect for extended cable assemblies often found in shipyards, structural steel fabrication, and large-scale manufacturing. It is part of the industry-standard Tweco 45 Series, making it a direct replacement for liners in Tweco No. 4, No. 5, and No. 6 MIG guns, as well as Spray Master 450 and 600 series models.

Manufactured from zinc-plated spring steel, the conduit offers excellent flexibility while maintaining the rigidity needed to prevent kinking. A smooth internal surface reduces friction, which is critical when pushing heavy wires over 25 feet. Whether you are running flux-cored or solid steel wire, replacing your liner regularly with genuine Tweco parts helps maintain arc stability and weld quality.

Why Choose Genuine Tweco Liners?

Using authentic Tweco consumables ensures precise fitment and optimal performance. Worn liners are a leading cause of erratic arcs and birdnesting. By installing the 1450-1125 liner, you restore your MIG gun's performance, ensuring consistent wire delivery for high-quality welds.