Millermatic 350 Wire Drive Tension Knob Assembly

Keep Your Millermatic Running Smoothly

Is your wire slipping? Are you struggling to get that perfect hum from your Millermatic 350? Often, the culprit isn't the machine itself, but a small, worn-out part in the feeder. The Miller 248631 Tension Adjust Knob Assembly is the exact part you need to restore reliable wire feeding to your welder. We know that in a busy shop, a broken knob or a missing washer can bring production to a grinding halt. You shouldn't have to rig your machine with pliers or temporary fixes that just frustrate you in the middle of a bead.

This kit comes straight from Miller Electric and includes the tension knob and the essential cupped washer. The knob is designed to be easy to grip, even with gloves on, allowing you to dial in the perfect pressure for your wire. Whether you are running .030" solid wire or .045" flux-cored, having a functional tension adjuster means you can prevent the dreaded "birdnesting" or the stuttering starts that ruin your weld appearance. The cupped washer ensures the spring sits right, so every turn of the knob actually changes the pressure like it's supposed to.

Don't let a small plastic part compromise your expensive welding equipment. If your current knob is cracked, stripped, or just missing, this OEM replacement is the quick fix that gets you back to burning metal. It installs in seconds—just unscrew the old one (if it's still there) and thread this one on. It fits the Millermatic 350 perfectly because it was made for it.

Investing in genuine Miller parts means you aren't guessing if it will fit. You get the durability and quality you expect from the brand. Keep a spare in your toolbox or fix that nagging issue today. Smooth wire feeding is the secret to a happy welder and a perfect weld, and it starts with the right tension.