49V28 - Weldcraft 49V28 1/4-Inch Gas Lens for 27 Series Torches

Precision Gas Flow Control for TIG Applications

The Weldcraft 49V28 Gas Lens is a critical component for high-precision TIG welding operations utilizing 27 Series torches. Engineered to replace standard collet bodies, this 1/4-inch (6.4mm) gas lens incorporates a multi-layer mesh screen assembly that fundamentally alters the dynamics of shielding gas delivery. By rectifying the turbulent flow often associated with standard nozzles into a coherent, laminar stream, the 49V28 ensures superior atmospheric exclusion even at extended distances from the nozzle exit.

In industrial environments where weld integrity is paramount, the stability of the shielding gas envelope is essential. The 49V28 minimizes the aspiration of atmospheric contaminants into the arc zone, reducing the likelihood of porosity and oxidation. This component is specifically calibrated for use with Weldcraft 27A and 27B torches, ensuring a precise fit and optimal electrical conductivity. The reduction in turbulence not only enhances weld quality but also improves gas efficiency in certain applications by directing the flow more effectively over the workpiece.

Technical professionals will appreciate the operational flexibility provided by this gas lens. The laminar flow characteristics allow the tungsten electrode to be extended significantly further beyond the cup—often up to an inch depending on conditions—without losing shielding effectiveness. This capability is indispensable for complex geometries and restricted access welds where standard nozzle configurations would fail to provide adequate coverage.