11-45 - 11-45 Contact Tip .045 for Tweco #1 & Magnum 100L

Reliable 11-45 Contact Tips for Smooth Wire Feeding

Every welder knows that the contact tip is the heart of the MIG gun. If your tip is worn out, your arc starts sputtering, your wire starts dragging, and your welds start looking like popcorn. The Tweco Style 11-45 Contact Tip is your go-to replacement for running .045" wire in some of the most popular guns on the market. Whether you are running a classic Tweco No. 1, a Lincoln Magnum 100L on your shop welder, or a Weldskill setup, these tips are built to fit right and keep you burning wire without the headache.

We know that "burnback" is a dirty word. That's why these tips are machined from high-quality copper alloy that handles heat better than cheap generic alternatives. They are rated for up to 200 amps, covering almost all standard short-circuit and spray transfer applications you'll throw at a compact MIG gun. The bore is drilled to a precise tolerance so your wire slides through smoothly but stays in constant electrical contact. This means less birdnesting at the drive rolls and a crisp, consistent sizzle at the puddle.

Don't get caught in the middle of a project with a clogged or melted tip. These 11-45 tips screw directly into your standard 35-50 gas diffuser, making changeouts quick and painless. The part number is stamped right on the side, so you never have to guess if you grabbed the right size for your .045 wire. They are an essential part of any welder's toolkit, perfect for everything from auto body work to farm repairs.

Pro Tip: Keep a handful of these in your toolbox. Contact tips are consumables for a reason—they take the brunt of the heat and spatter. Swapping to a fresh 11-45 tip is often the cheapest and fastest fix for an unstable arc. Pair these with a good nozzle dip to keep spatter from sticking, and you'll get even more life out of each tip.