Parts of the TIG torch that must be kept clean?

• A. Cup (nozzle) and collet
• B. Tungsten tip and tip guard
• C. Gas hose and power lead
• D. Cable and switch

Answer: (A)

Keeping the cup (nozzle) and the collet clean is essential because these components directly affect shielding gas delivery and arc stability. The cup guides the shielding gas right to the weld area, so dirt or clogs can disrupt gas flow, cause turbulence, and allow air to reach the weld pool, leading to porosity and oxidation. The collet holds the tungsten electrode and also helps seal the gas path inside the torch; any debris here can prevent the tungsten from seating properly and can cause gas to leak or the arc to wander. Together, a clean cup and clean collet ensure a focused gas shield and a stable, clean arc, which are critical for a good TIG weld. The other parts mentioned are important for overall operation, but they don’t influence the shielding gas path and arc in the same direct way.