How to Replace a TIG Collet Body

Quick Answer

Replace your TIG collet body by removing the back cap, unscrewing the old body, and threading in the new one—matching the size to your tungsten electrode and torch series.

Step-by-Step Replacement

1. 1. Remove the Back Cap and Power Cable: Unscrew the back cap from the torch handle. Slide it back along the power cable. Pull the power cable out of the handle. Keep the back cap and cable free from dirt so they don't contaminate the new collet body.
2. 2. Unscrew the Old Collet Body: Use a collet body wrench or a small flathead screwdriver to loosen and remove the old collet body from the torch head. Turn counter-clockwise. Do not use pliers directly on the collet body; they can deform the threads and ruin the torch head.
3. 3. Clean the Torch Head Threads: Wipe the internal threads of the torch head with a clean, lint-free cloth. Inspect for any debris or burrs. Even a tiny metal chip can prevent the new collet body from seating correctly, causing gas leaks.
4. 4. Install the New Collet Body: Select the new collet body that matches your tungsten electrode diameter (e.g., 1/16" for 1/16" tungsten). Hand-thread it into the torch head clockwise. Tighten snugly with a wrench—do not overtighten. Overtightening can strip the threads or distort the collet body, leading to poor grip and gas loss.
5. 5. Reassemble the Torch: Slide the power cable back into the handle. Screw the back cap on firmly. Insert the tungsten, collet, and collet body cap, then tighten the cap. Test the new setup by turning on the gas and listening for leaks at the torch head before striking an arc.

What You Need

• Collet Body, 5-Pack: USAWeld® Collet Body, 5-Pack, for 17 and 26 Series air-cooled and 18 Series water-cooled TIG torches. Available in sizes: .040", 1/16",… A 5-pack ensures you have the right size on hand for common tungsten diameters, so you don't have to stop a job to hunt for a single replacement.