M1429 - Miller Teflon Liner for .047-.062 Aluminum Wire

Smooth Aluminum Feeding with Miller M1429

Struggling with bird-nesting or erratic wire feeding while welding aluminum? The solution often lies in your liner. The Miller M1429 Teflon Liner is specifically built to handle the unique challenges of aluminum MIG welding. Unlike steel liners that are rough and can shave soft aluminum wire—causing clogged liners and contact tips—this Teflon liner offers a smooth, slippery surface that allows the wire to glide effortlessly from the feeder to the contact tip.

Designed for wire sizes between .047" (3/64") and .062" (1/16"), this liner is perfect for welders tackling aluminum projects ranging from automotive repair to boat building. The low-friction nature of Teflon means you can run softer wires like 4043 or 5356 with greater confidence and less downtime. A consistent wire feed is crucial for aluminum welding, as even momentary hesitations can cause burn-backs to the tip or porous welds. By upgrading to the M1429, you are investing in smoother arcs and cleaner beads.

Installation is straightforward, but remember that Teflon liners require care. They should be trimmed precisely and often require a neck liner or brass jumper in the gun neck to prevent the Teflon from melting if it gets too close to the high heat of the gas diffuser. Ensure your MIG gun is set up correctly with this liner to experience the difference in your aluminum welding performance. Don't let feeding issues slow you down; equip your torch with the right tool for the job.