14001123 - Tweco 42-40-15 MIG Gun Liner .035-.045 15ft

Reliable Wire Feeding with Tweco 1400-1123 Conduit

The Tweco 1400-1123 (Part No. 42-40-15) is a premium steel conduit liner designed to restore the performance of your MIG welding gun. A worn or kinked liner is one of the most common causes of erratic wire feeding, arc instability, and bird-nesting. By replacing your old liner with this genuine Tweco 42 Series conduit, you ensure smooth, consistent wire delivery to the contact tip, resulting in cleaner welds and less frustration.

This liner is engineered specifically for .035" to .045" (0.9mm - 1.2mm) welding wires and comes in a standard 15-foot length, making it compatible with a wide range of Tweco MIG guns, including the industry-standard Spray Master and Classic No. 2, 3, and 4 series. The liner is constructed from high-quality zinc-plated spring wire, which offers excellent flexibility while resisting corrosion and reducing internal friction.

Key Benefits for Industrial Welders

Maintenance is key to longevity in welding equipment. The Tweco 42-40-15 liner features a robust wound steel design that withstands the rigors of daily industrial use. Its precise internal diameter supports the wire without binding, even when the gun cable is bent during operation. Whether you are fabricating structural steel or performing automotive repairs, this liner provides the reliability professional welders demand.

• Universal Compatibility: Fits most Tweco 15ft MIG guns using 42 series consumables.
• Smooth Operation: Low-friction surface minimizes drag on the welding wire.
• Easy Installation: Ready to install with standard termination points for Tweco adapters.