14401127 - Tweco 44-3545-15 MIG Gun Conduit Liner .035-.045 15ft

Tweco 1440-1127 (44-3545-15) MIG Gun Conduit Liner

The Tweco 1440-1127 is a premium replacement conduit liner belonging to the industry-standard 44 Series. Identified by the part number 44-3545-15, this liner is engineered specifically to accommodate welding wires ranging from .035 inches (0.9 mm) to .045 inches (1.2 mm) in diameter. With a total length of 15 feet (4.5 meters), it is designed to fit standard Tweco MIG gun cable assemblies, including the Classic No. 3, No. 4, and No. 5 series, as well as Spray Master and Professional models.

Manufactured from high-grade zinc-plated music wire, this conduit offers exceptional mechanical strength and resistance to corrosion. The zinc plating acts as a lubricant, significantly reducing the coefficient of friction between the liner wall and the welding wire. This reduction in drag is critical for maintaining a consistent wire feed speed, which directly correlates to arc stability and weld quality. The liner's wound steel construction provides the necessary flexibility to navigate the cable assembly while maintaining a rigid internal diameter to prevent wire buckling.

Proper maintenance of the wire feeding path is essential for industrial welding operations. Over time, liners can accumulate copper dust, dirt, and debris, leading to erratic feeding or "burn-back." Replacing the liner with a genuine Tweco 44-3545-15 ensures that the MIG gun operates at peak efficiency. The liner comes ready to install and can be easily trimmed to the precise length required for your specific gun configuration. It is a critical consumable for fabricators relying on GMAW (MIG) and FCAW (Flux-Cored) processes.