20002070 - Tweco 35-70 Conductor Tube Insulator for No. 3 & 4 MIG Guns

Keep Your Tweco Gun Running Safe with the 35-70 Insulator

If you are running a Tweco No. 3 or No. 4 MIG gun, you know that the front end takes a beating. The conductor tube insulator—that sleeve that covers the metal neck of your gun—is your first line of defense against accidental shorts. When you're working in tight spaces or resting the gun down, a cracked or missing insulator can cause the charged neck to arc against your table or workpiece. This not only ruins your contact tip and nozzle but can also damage your machine's drive rolls or circuit board. The Tweco 35-70 Conductor Tube Insulator is the exact replacement you need to keep your gear in top shape.

Built from tough, heat-resistant fiberglass, this insulator isn't just a piece of plastic; it's designed to handle the intense heat of 300 to 400 amp welding all day long. It resists spatter buildup and won't melt or deform under normal operating conditions. We know that in the shop, equipment gets dropped and banged around. This insulator adds a layer of impact protection to the metal conductor tube underneath, helping to prevent bends or dents that could restrict wire feeding.

Swapping it out is easy. Just strip the front consumables off your gun, slide the old, beat-up insulator off, and slip this fresh one on. It fits perfectly because it's a genuine Tweco part, not a knock-off that rattles around. Don't wait until you see sparks flying from the side of your gun neck. Keep a spare 35-70 in your toolbox so you can fix it fast and get back to laying beads. Whether you are using a classic Tweco gun or a Spray Master, this is the part that keeps the juice where it belongs: at the arc.