The TIG insulator (heat shield) often gets overlooked. But it is often designed to match the type of ceramic cup being fitted. You can use different insulators with different types of ceramic cups, but the shielding gas may leak from the joint between the insulator and ceramic cup, rather than the end of the nozzle.
|TIG Heat Shield||Heat Shield|
The TIG torch insulator (heatshield) is often designed to fit the gas cup as well as the TIG torch. Therefore it is just as important to match the shape of the Insulator to the gas cup (nozzle), and to match the insulator to the correct TIG torch.
As you can see from the image above, each of the white heat shields have a slightly different profile. Each are designed to match the profile of the gas cup (nozzle), as well as the TIG gun.
Therefore, when buying heat shields it may be advantageous to buy them as part of a set of kit, because the parts are more likely to match.
They don’t tend to have a screw thread, but just twist on and off the TIG torch head (over a rubber lip). Make sure the torch has cooled down before trying to remove the heat shield…
– click or tap any image to view full size –