45V63 - Weldcraft 45V63 Large Diameter Gas Lens 5/32" (Pack of 2)

Precision Shielding for Heavy-Duty TIG Applications

The Weldcraft 45V63 Large Diameter Gas Lens is an essential upgrade for professional fabricators utilizing 5/32-inch (4.0mm) tungsten electrodes. Designed to fit standard 17, 18, and 26 series TIG torches, as well as CS300 and CS410 models, this component fundamentally changes the dynamics of shielding gas delivery. Unlike standard collet bodies that can create turbulent gas exit profiles, the 45V63 incorporates a precision-engineered multi-layer stainless steel mesh screen. This screen acts as a diffuser, straightening the flow of argon or helium into a coherent, laminar column that envelops the weld pool with exceptional stability.

Achieving laminar flow is critical when welding reactive metals or when operating in drafty shop environments. The stable gas column provided by the 45V63 allows the welder to extend the tungsten electrode significantly further beyond the nozzle cup—often up to an inch or more depending on the setup—without compromising shielding integrity. This extended stick-out capability provides unparalleled visibility of the arc and puddle, allowing for precise manipulation in deep grooves, fillets, and restricted access joints where a standard nozzle would obstruct the view.

Furthermore, the improved gas coverage efficiency can lead to reduced gas consumption rates while simultaneously lowering the risk of atmospheric contamination, porosity, and oxidation. The large diameter design is specifically intended for higher amperage applications where 5/32" tungsten is required, ensuring that the larger weld pool receives adequate coverage. Manufactured to Miller's exacting OEM standards, the Weldcraft 45V63 ensures consistent fit-up, thermal conductivity, and longevity, making it a reliable choice for critical aerospace, petrochemical, and heavy industrial welding tasks.