TIG ALUMINA CERAMIC CUP / NOZZLE #5 8MM – TO SUIT 17/18/26 10N49 5pk

TIG alumina ceramic cups are used to direct and focus shielding gas (typically argon) over the weld pool and the tungsten electrode to prevent atmospheric contamination. Without this gas shield, metals like aluminum and stainless steel would oxidize immediately, leading to weak and porous welds.

Primary Functions
Atmospheric Shielding: The cup creates a localized, inert environment that protects the molten metal from oxygen, nitrogen, and moisture.
Heat Resistance: Made from high-purity alumina oxide, these cups can withstand extreme temperatures exceeding 2,000°C without deforming or cracking.
Electrical Insulation: Alumina is non-conductive, which prevents the torch's current from "arcing out" to the nozzle or the workpiece if they come into close proximity.
Arc Stability: By directing the gas in a controlled column, the cup helps stabilize the welding arc, which is critical for precision work.

Specific Benefits of the #5 (8mm) Cup
The #5 cup (8mm orifice) is considered a versatile, mid-sized nozzle. Experts and professional welders often choose this size for several reasons: 
Aluminum Welding: The #5 cup is a favorite for aluminum as it effectively limits the "etching zone" (the white cleaned area around the weld), focuses energy into the puddle for better penetration, and uses less argon gas (approx. 12 CFH) compared to larger cups.
Tight Spaces: Its slim profile allows welders to access restricted joints and corners where larger nozzles might obstruct their view or physically not fit.
Gas Efficiency: Smaller cups like the #5 achieve effective shielding at lower flow rates, making them more cost-effective for routine fabrication and repair tasks.
General Purpose: Size #5 is ideal for low-to-medium current welding on thinner materials. 

Industry Applications
Aerospace & Medical: Used for clean, contamination-free welds on sensitive alloys like titanium and stainless steel.
Automotive: Ideal for thin-gauge fabrication, such as exhaust systems, fuel tanks, and custom chassis work.
Shipbuilding & Repair: Provides durable, heat-resistant performance for long-duration welding cycles.