14501123 - Tweco 45-35-45-15 Steel MIG Liner 15ft for .035-.045 Wire

Smooth Feeding for Your Tweco Gun

Is your wire stuttering? Are you feeling that annoying vibration in the handle, or worse, dealing with a bird's nest at the feeder right in the middle of a bead? It’s probably time to change your liner. The Tweco 1450-1123 (also known as the 45-35-45-15) is the standard replacement conduit for 15-foot Tweco MIG guns running .035" to .045" steel wire. It’s the backbone of your wire delivery system, and a fresh one can make an old gun feel brand new.

Built for the Grind
This isn't just a generic spring; it's a zinc-plated steel wound liner designed to take a beating. The zinc coating helps your wire slide through smoothly, cutting down on drag and saving your drive rolls from working overtime. Whether you are running solid MIG wire or flux-cored, this liner keeps it moving consistently so you can focus on the puddle, not the feeder.

Perfect Fit
Designed for the classic Tweco No. 3, No. 4, and Spray Master guns, this liner comes ready to install. It features the correct brass stop on the back end to lock it into your power pin. It comes at a standard 15-foot length, which you can easily trim down to fit your specific gun setup perfectly. Don't let a $20 part ruin a day's worth of welding—keep a spare 1450-1123 in your toolbox.

Installation Tip:
When installing, lay your gun cable out straight on the floor. Remove the old liner, blow out the cable with compressed air, and slide the new one in. Only trim the excess sticking out of the neck after you've seated the back end and tightened everything down. A clean, sharp cut at the front ensures the liner butts up perfectly against your gas diffuser, preventing wire shaving and erratic arcs.