49V26 - Miller 49V26 Large Diameter Gas Lens for 27 Series Torches

Technical Overview of the Weldcraft 49V26 Gas Lens

The Weldcraft 49V26 Gas Lens is a specialized TIG welding consumable designed to optimize shielding gas coverage for heavy-duty applications. Engineered for use with 5/32-inch (4.0mm) tungsten electrodes, this component is essential for operators utilizing the Weldcraft 27A and 27B series torches. Unlike standard collet bodies which can produce turbulent gas flow, the 49V26 incorporates a multi-layer fine mesh screen system. This internal structure rectifies the flow of inert gas (typically Argon or Helium) into a coherent, laminar stream as it exits the nozzle.

The primary technical advantage of this laminar flow is the significant reduction in atmospheric contamination. By virtually eliminating turbulence, the gas lens creates a stiff column of shielding gas that resists cross-drafts more effectively than standard setups. This stability allows the welder to extend the tungsten electrode farther beyond the cup edge—often up to an inch depending on the cup size—without compromising the inert atmosphere around the weld pool. This extended stick-out capability is critical when welding in deep grooves, corners, or complex geometries where nozzle access is restricted.

Constructed from high-quality brass and conductive alloys, the 49V26 ensures efficient current transfer from the torch body to the collet and tungsten. It is designed to withstand the high amperage loads typically associated with 5/32" electrodes and the heavy-duty 27 series torches. Proper installation requires pairing with the appropriate collet and nozzle cup designed for gas lens assemblies. This unit is sold individually and is a direct replacement for existing 49V26 parts within the Miller/Weldcraft ecosystem.

Key Specifications

• Part Number: 49V26
• Electrode Diameter: 5/32" (4.0mm)
• Torch Compatibility: Weldcraft 27A, 27B
• Flow Characteristic: Laminar