Make sure you have a tight fit between the collet and tungsten, as this helps guarantee good conductivity and a stable arc. The output water hose is blue, the return water hose/power cable is red, and the gas hose is black.įirst assemble the collet and collet body then insert the tungsten electrode. Once you've identified the torch components you need, you're ready to assemble your GTAW torch, the steps of which are the same whether you have an air- or water-cooled model.įigure 1Water-cooled torches have color-coded hoses to ease installation. Rubber hoses also maintain flexibility and durability in cold environments better than vinyl. Vinyl works well for light-duty applications, but braided rubber hoses resist heat and kinking and tend to last longer. The length you choose depends on the joint access you require.įinally, determine whether you want a rubber or vinyl hose and power cable. Top off your GTAW torch with either a short, medium, or long back cap, all of which tighten the collet against the collet body to hold the tungsten in place. All air- and water-cooled GTAW torches are compatible with gas lenses, and the amperage requirements, tungsten size, and joint configuration will determine the gas lens and corresponding nozzle sizes. Gas lenses are recommended for welding on highly reactive alloys that have the added risk of volatile reaction to oxygen and atmospheric contaminants. When you require greater joint access or better shielding gas coverage, you can replace a collet body with a gas lens. These components are usually constructed of copper or a copper-tellurium alloy, which both provide good conductivity. The collet and collet body hold the tungsten in place, and the size of the tungsten determines the size of each that you need. Other electrode options include pure tungsten, 2 percent thoriated, 1.5 percent lanthanated, zirconiated, and rare earth. A 3⁄32-in., 2 percent ceriated tungsten electrode is a common choice, as it can be used for welding at 5 to 200 amps. The kind you use depends on the base material's thickness and type, and whether you weld with alternating or direct current. The tungsten electrode conducts heat to the arc. (#16) and are made primarily of alumina or lava. In a GTAW torch, the nozzle (or cup) directs shielding gas onto the weld puddle and protects it and the tungsten electrode from outside contaminants. Conversely, a water-cooled torch has a constant source of coolant removing the heat and therefore has smaller front-end torch parts.
SCORCH TORCH ASSEMBLY DIAGRAM PLUS
This is because air-cooled torches rely on the ambient air plus argon gas to cool the torch and need the additional surface area of the components to help dissipate the heat. First, know that air-cooled torch components, like collets and collet bodies, are noticeably larger than those built for water-cooled torches. Likewise, air-cooled torches work well outside because they do not require a separate water cooler, and water-cooled torches are better for use in the shop.īefore assembling your GTAW torch, consider briefly each of its components. For example, air-cooled GTAW torches are better-suited for low-amperage applications, whereas water-cooled torches are recommended for applications requiring more than 200 amps. An air-cooled torch is almost always larger and heavier than its water-cooled counterpart, but the cooling capacity required for a particular application always dictates which one to use. GTAW torches come in a variety of shapes and sizes for added flexibility, accessibility, and operator comfort.
SCORCH TORCH ASSEMBLY DIAGRAM HOW TO
To help ensure your chances of welding success, it is important to know how to assemble and install your GTAW torch properly.
This holds true for water- and air-cooled torches, as well as those with remote amperage controls. As if gas tungsten arc welding (GTAW) weren't already difficult to master, GTAW torches have numerous interchangeable parts and designs to further complicate matters.
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