KP2019-1B1 - Lincoln Electric #4 Alumina Gas Lens Cup for 9/20 Series Torches

Precision TIG Welding with Lincoln Electric Alumina Gas Lens Nozzles

The Lincoln Electric KP2019-1B1 is a premium Alumina Gas Lens Nozzle designed to elevate the performance of your TIG welding operations. Engineered for professional fabricators and industrial welders, this No. 4 nozzle (1/4-inch orifice) is an essential component for achieving high-quality welds in applications requiring meticulous gas coverage. Manufactured from high-grade alumina ceramic, this nozzle offers exceptional resistance to thermal shock and high temperatures, ensuring longevity even under rigorous welding cycles.

This specific nozzle is designed to function seamlessly with gas lens collet bodies on 9 and 20 series TIG torches (including PTA-9, PTA-20, and PTW-20). Unlike standard collet bodies that create turbulent gas flow, the gas lens system—which this nozzle accommodates—smooths the flow of shielding gas into a laminar stream. This laminar flow is critical for protecting the molten weld pool from atmospheric contamination, reducing oxidation, and allowing for a longer tungsten stick-out. The ability to extend the tungsten further without losing gas coverage makes this #4 cup particularly valuable for welding in tight corners, fillets, or complex geometries where visibility is limited.

Durability is a hallmark of Lincoln Electric consumables. The KP2019-1B1 withstands the intense heat of the arc without cracking or degrading prematurely. Its precise threading ensures a tight fit against the torch insulator, preventing gas leakage that could compromise weld integrity. Whether you are working with stainless steel, mild steel, or exotic alloys, upgrading to a gas lens setup with high-quality alumina nozzles is a cost-effective way to improve weld consistency and reduce post-weld cleaning. Trust Lincoln Electric for consumables that deliver reliability and precision in every arc.

Key Technical Benefits

• Thermal Durability: Alumina ceramic composition resists cracking from rapid heating and cooling cycles.


• Enhanced Shielding: Optimized for gas lens systems to provide a coherent stream of shielding gas.


• Precision Access: Small #4 diameter allows access to restricted areas and improves puddle visibility.


• Universal Fit: Compatible with standard industry 9-series air-cooled and 20-series water-cooled torches.