45V42 - Weldcraft 45V42 .040" Gas Lens for 9/20 Series Torches (2-Pack)

Precision Shielding for High-Quality TIG Welding

The Weldcraft 45V42 Gas Lens is an essential upgrade for professional TIG welders seeking superior control over their shielding gas coverage. Designed to fit 9, 20, 22, 24, and 25 series TIG torches, this component replaces the standard collet body to transform the way shielding gas exits the nozzle. Unlike standard collet bodies which can create turbulent gas flow, the 45V42 utilizes a multi-layered fine mesh screen to rectify the gas stream into a coherent, laminar column. This reduction in turbulence is critical for maintaining a pure weld pool, especially when welding reactive metals like stainless steel, titanium, or aluminum where atmospheric contamination can lead to immediate defects.

One of the primary technical advantages of using the 45V42 gas lens is the ability to extend the tungsten electrode further beyond the cup without sacrificing shielding integrity. In standard setups, extending the tungsten too far results in the gas column dissipating before it reaches the weld pool, leading to porosity. With the laminar flow provided by this gas lens, the coherent stream of argon (or helium mixes) remains stable for a greater distance. This feature is invaluable when welding in tight corners, deep grooves, or complex geometries where the torch nozzle would otherwise obstruct the welder's view or fail to fit. By allowing for a longer stick-out, the operator gains significantly better visibility of the arc and the puddle, resulting in more precise bead placement and higher quality finishes.

This pack contains two genuine Weldcraft 45V42 gas lenses, sized specifically for .040" (1.0mm) tungsten electrodes. Precision-manufactured to tight tolerances, these lenses ensure a perfect electrical connection and efficient heat transfer, which helps in cooling the front end of the torch. Whether you are performing delicate aerospace work or general fabrication, integrating a gas lens into your torch setup is a proven method to enhance arc stability and weld cleanliness.