45V27 - 45V27 1/8" TIG Gas Lens Collet Body for 17/18/26 Torches - 2 Pack

Precision Shielding for GTAW Applications

The 45V27 Gas Lens is an essential consumable for professional Gas Tungsten Arc Welding (GTAW), specifically engineered to enhance the performance of 17, 18, and 26 series TIG torches. Designed to accommodate 1/8-inch (3.2mm) tungsten electrodes, this component replaces standard collet bodies to fundamentally alter the delivery of shielding gas to the weld zone. Unlike standard collet bodies which can create turbulent gas flow, the 45V27 utilizes a multi-layer mesh screen to rectify the gas stream, organizing it into a coherent, laminar column. This reduction in turbulence is critical for maintaining an inert atmosphere around the molten weld pool, particularly when welding reactive metals or high-grade stainless steel where oxidation must be strictly controlled.

Manufactured from high-conductivity copper and brass alloys, the 45V27 ensures efficient current transfer and thermal management within the torch head. The robust construction supports an amperage range of 150 A to 350 A, making it suitable for both air-cooled (17, 26 series) and water-cooled (18 series) torch configurations. By stabilizing the gas column, this gas lens allows the operator to extend the tungsten electrode significantly further beyond the nozzle cup—often up to an inch depending on the cup size—without compromising shielding integrity. This extended reach provides superior access to tight fillets, narrow grooves, and complex geometries that would otherwise be inaccessible with a standard setup.

The implementation of the 45V27 Gas Lens system directly correlates to improved weld quality and reduced rework. The laminar flow minimizes the aspiration of atmospheric contaminants into the shielding stream, resulting in cleaner welds with less discoloration. Furthermore, the stable arc environment promotes consistent penetration and bead profile. This pack contains two (2) genuine-spec gas lenses, ensuring that operators have a reliable replacement on hand to maintain peak equipment performance during critical fabrication tasks.