14401123 - Tweco 1440-1123 MIG Gun Liner 15ft .035-.045

Optimize Your MIG Gun Performance with the Tweco 1440-1123 Liner

The liner is often the unsung hero of the MIG welding process, and the Tweco 1440-1123 Conduit Liner is built to deliver the consistency professional welders demand. This 15-foot steel liner is precision-manufactured to guide .035" to .045" welding wire through the cable assembly with minimal resistance. Friction is the enemy of a stable arc; a worn or clogged liner can cause wire chatter, burnback, and irregular bead profiles. By upgrading to a fresh Tweco 1440-1123, you restore the smooth, fluid wire delivery necessary for high-quality welding, whether you are working in short-circuit transfer or spray transfer modes.

Tweco utilizes a robust zinc-plated steel wire for the construction of this conduit. The flat-wound spring design provides excellent flexibility, allowing the gun cable to bend and maneuver without collapsing the inner diameter or pinching the welding wire. This flexibility is critical for operators working in tight spaces or out-of-position welds where the gun cable is frequently manipulated. The zinc coating serves a dual purpose: it protects the steel liner from rust and oxidation, and it provides a low-friction surface that helps the welding wire slide effortlessly. This reduces the load on your wire feeder motor and drive rolls, extending the life of your entire feeding system.

Compatibility is key when selecting replacement parts, and the 1440-1123 is designed as a universal fit for many of the most popular Tweco MIG guns. It fits the 15-foot versions of the Tweco Spray Master, the legendary Classic Series (No. 3, 4, and 5), and the Professional Series. The liner comes ready to install but should be measured and trimmed according to the manufacturer's instructions to ensure the correct stick-out at the gas diffuser. A liner that is cut too short can cause arcing inside the gun neck, while one that is too long can cause feeding issues at the back end. This liner gives you the length you need to get a perfect fit every time.

Regular maintenance of your MIG gun includes inspecting and replacing the liner. Over time, copper shavings from the wire and shop dust can accumulate inside the conduit, increasing drag. While blowing out the liner with compressed air can help, replacement is eventually necessary to maintain weld quality. The Tweco 1440-1123 is an affordable, high-quality solution that restores your gun to factory-fresh feeding performance. Don't let a bad liner ruin your welds—stock up on genuine Tweco liners and keep your arc smooth and stable.