14501115 - Tweco 45-116-25 Steel MIG Liner for 1/16 Wire - 25ft

Restore Performance with the Tweco 45-116-25 MIG Liner

Keep your welding operations productive and frustration-free with the Tweco 45-116-25 Standard Conduit Liner (Part Number 1450-1115). As any experienced welder knows, the liner is the backbone of the wire feeding system. Over time, liners accumulate dust, shavings, and debris, or simply wear out from the constant friction of the moving wire. This wear leads to erratic feeding, arc instability, and eventual downtime. The Tweco 45-116-25 is the direct replacement solution designed to restore your MIG gun to factory-fresh performance.

Optimized for 1/16-inch (1.6mm) welding wire, this liner is built to handle the demands of high-amperage welding. Its 25-foot length makes it suitable for long cable assemblies, giving you the freedom to move around large workpieces without compromising feed quality. The liner is constructed from durable spring steel wire, wound tightly to create a flexible yet crush-resistant channel. A zinc plating finish is applied to the steel, significantly reducing the coefficient of friction inside the liner. This means your wire feeder motor doesn't have to work as hard, and the wire is delivered to the contact tip with consistent speed and precision.

This "Standard" type conduit is ideal for use with mild steel and flux-cored wires. It is not recommended for aluminum wire (which requires a polymer liner), but for general steel fabrication, it is the industry standard for reliability. The liner fits Tweco 45 Series compatible guns, which includes many of the heavy-duty models found in shipyards, rail shops, and heavy equipment manufacturing. The brass crimped end fitting ensures positive electrical and mechanical connection at the feeder end, preventing gas loss and ensuring the liner stays anchored.

Don't let a $20 part cause hundreds of dollars in lost production. If you are experiencing bird-nesting at the feeder or a sputtering arc at the tip, check your liner. Upgrading to a fresh Tweco 1450-1115 conduit is a quick and cost-effective maintenance step that pays dividends in weld quality and operator satisfaction. Ensure you have the right tools for the job by keeping genuine Tweco consumables on hand.