The shielding gas exits the gas nozzle (gas lens) and fills the gas cup that screws over and surrounds the gas nozzle.
|TIG Gas Nozzle||Gas Nozzle|
|Nozzle Type||Names Used|
A bog standard gas nozzle (collet body). Great for straight forward TIG welding.
The ‘Stubby’ gas nozzle is basically a shortened version of the longer standard gas nozzle (to aid usage in tighter spaces).
The ‘Wide’ gas nozzles are designed to give a good shielding gas coverage. A diffuser is often fitted, to try and focus the shielding gas. This often allows the tungsten electrode to protrude further from the gas cup, aiding visibility when welding in restricted spaces. They also allow for a shorter TIG gas cup to be fitted, giving easier access (with a now shorter TIG torch) in restricted spaces.
Gas nozzles are available in a variety of sizes. The size of the hole in the middle, (to fit the different size Tungsten electrodes, typically between 1.0mm (0.040″) and 6.35mm (1/4″)) usually dictates the actual size given to the gas nozzle.
As you can see, the outside diameter tends to remain the same for a set of gas nozzles, however the length can vary and are often classified as standard (long), or stubby. The actual length may vary between manufacturers
The nozzles will need to fit the size of TIG torch being used. This is often split into two groups – See the article Which Parts Fit Which TIG Torch?
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