14401103 - Tweco 44-3545-15 MIG Gun Liner for .035-.045 Wire, 15ft

Fix Your Feed with the Tweco 44-3545-15 Liner

There is nothing more frustrating than a MIG gun that sputters, stutters, and burns back because the wire isn't feeding smoothly. If you are fighting your machine, checking your drive rolls, and still getting an erratic arc, it is likely time to change your liner. The Tweco 44-3545-15 (Stock code: 1440-1103) is the standard 15-foot replacement liner for welders running .035" or .045" wire. This is the "vein" of your MIG gun, and when it gets clogged with shop dust or kinked from heavy use, your weld quality suffers immediately.

This liner is built from wound spring steel, making it flexible enough to navigate the bends in your cable while remaining rigid enough to guide the wire straight into the diffuser. It fits the most popular Tweco guns you'll find in the shop, including the Spray Master and the old-school Classic numbers. Installing it is straightforward: simply remove the nozzle and diffuser, disconnect the gun from the feeder, pull the old liner out, and slide this new one in. It comes ready for 15-foot whips but is easily trimmed with side cutters to match your specific gun length. Don't forget to file the cut end smooth to prevent wire shaving.

Whether you are running solid wire with gas or flux-cored wire in the field, a fresh liner is the cheapest insurance for a good day of welding. Stop fighting the bird-nests at the feeder and replace your conduit. This 44 Series liner is the reliable choice for general fabrication, automotive repair, and structural steel work where .035 and .045 wires are the daily standard.