79Z92 - ESAB HW-18 Collet Seat for 1/8 Inch Tungsten

Keep Your HW-18 Torch Running Cool and Stable

If you are running a heavy-duty water-cooled rig like the HW-18, you know that the quality of your consumables directly affects your arc stability. The ESAB 79Z92 Collet Seat is the standard replacement part for running 1/8-inch tungsten in these torches. Over time, the constant heating and cooling cycles, along with the mechanical pressure of tightening the back cap, can wear down the seating surface of your internal torch parts. A worn collet seat often results in a "floating" arc, poor starts, or a torch head that gets hotter than it should. Swapping in a fresh 79Z92 restores that crisp, reliable electrical connection you need for high-quality TIG work.

This collet seat is built to handle the amperage that 1/8-inch tungsten is capable of carrying. Whether you are walking the cup on pipe or doing heavy structural aluminum work, the connection between the torch body and the collet needs to be solid. This ESAB part ensures that when you tighten down your back cap, the collet compresses evenly around the tungsten. This prevents the tungsten from slipping during a weld and ensures maximum current transfer. Because it is designed specifically for the HW-18 geometry, it also helps align your tungsten perfectly in the center of the cup, which is essential for consistent gas coverage.

Don't let a cheap or worn-out consumable ruin a critical weld. We recommend keeping a few of these collet seats in your kit. While collets themselves are changed frequently, the collet seat is often overlooked until it causes problems. Inspect your current seat for any signs of arcing, pitting, or threads that look stripped. If you see damage, replace it immediately with this genuine ESAB 79Z92. It fits seamlessly with your existing HW-18 setup and standard 1/8" collets, getting you back under the hood faster with equipment you can trust.

Installation is straightforward: simply remove the nozzle and collet, unscrew the old seat (if threaded in your specific setup) or slide it out, and insert the new one. Ensure your threads are clean and free of debris before installation to maintain the best possible electrical ground path.