14201125 - Tweco 42-4045-25 Steel MIG Liner .040-.045 25ft

Keep Your Wire Running Smoothly

Nothing ruins a good weld bead faster than a stuttering wire feed. If you are fighting against drag, erratic feeding, or the dreaded bird-nest at the drive rolls, it might be time to check your liner. The Tweco 42-4045-25 is a 25-foot steel replacement liner built to get your MIG gun back to peak performance. Designed for .040" to .045" wires, this liner is the backbone of your wire delivery system, guiding the filler metal through the cable with minimal resistance.

Tweco knows that friction is the enemy. That's why this liner is made from high-grade spring steel and zinc-plated. The plating acts as a lubricant of sorts, letting the wire glide through the cable even when you are twisted around a workpiece. The 25-foot length is perfect for those long-reach setups where you need to cover a lot of ground without moving the feeder. Whether you are running a Tweco Spray Master or a classic No. 4 gun, this liner drops right in and gets you back to burning metal.

Don't wait until the wire fuses to the tip to change your liner. A fresh conduit solves a multitude of feeding problems before they start. This liner is tough enough for daily industrial use but flexible enough to handle the bends and twists of real-world welding. Simply feed it through the back of your gun, trim it to the correct stick-out at the front, and you are ready to lay down smooth, consistent welds again. It is a small part that makes a huge difference in how your machine feels and performs.