LM2A-12 - Miller LM2A-12 AccuLock MDX Liner .030-.035 12ft

Stop Struggling with Liner Trimming

Every welder knows the frustration of changing a MIG gun liner. You pull the old one out, feed the new one in, and then comes the guessing game: where do you cut it? Get it wrong, and you're fighting birdnests and burnbacks for the rest of the day. The Miller AccuLock™ MDX™ MIG Gun Liner (LM2A-12) solves this problem once and for all. Designed for use with Miller MDX Series MIG guns, this liner takes the headache out of maintenance so you can get back to laying beads. This specific model is sized for the most common wire diameters in general fabrication—.030" and .035"—and fits 12-foot gun assemblies perfectly.

The magic is in the front-loading design. Instead of feeding from the back and hoping for the best, you load this liner from the front of the gun. It locks securely into place, ensuring perfect alignment with your contact tip. At the back end, the liner is designed to be locked and trimmed flush with the power pin cap, removing the need for measuring tapes or guesswork. This precise fit means the wire has a smooth, straight path from the feeder to the puddle. A smoother path means less drag on the wire, which translates to a more stable arc and cleaner welds.

If you are running an MDX-100 or MDX-250 gun, upgrading to a fresh AccuLock liner is one of the cheapest ways to improve your welding performance. Old, clogged liners are the number one cause of erratic feeding. By replacing your liner with the LM2A-12, you ensure that your machine runs as smoothly as the day you bought it. Whether you are welding mild steel in the garage or fabricating parts in a production shop, this liner provides the reliability you need to keep the wire moving and the sparks flying.