0157121017 - ESAB 45V43 1/16" Gas Lens Body for 9/20 Torches

Superior Shielding with ESAB 45V43 Gas Lens Technology

The ESAB 45V43 Gas Lens is a critical upgrade for professional TIG welders seeking to improve weld quality and consistency. Designed specifically for use with 1/16-inch (1.6mm) tungsten electrodes, this gas lens body fits standard 9, 20, and 25 series TIG torches. Unlike standard collet bodies that can create turbulent gas flow, the 45V43 utilizes a multi-layered fine mesh screen to straighten the flow of shielding gas (typically Argon) into a coherent, laminar stream. This laminar flow is essential for high-precision applications where atmospheric contamination must be eliminated.

When welding reactive metals such as stainless steel, titanium, or aluminum, the quality of the gas shield determines the integrity of the weld. The ESAB 45V43 ensures that the weld pool remains protected even when the tungsten electrode is extended further than usual. This capability allows welders to reach into tight corners, deep grooves, or complex geometries without sacrificing shield integrity. By reducing turbulence, this gas lens also minimizes the risk of pulling atmospheric oxygen into the weld zone, thereby reducing oxidation and the need for aggressive post-weld cleaning.

Manufactured to ESAB's rigorous standards, this component offers excellent thermal conductivity and durability. The brass body ensures a secure connection within the torch head, while the stainless steel mesh screens are resistant to heat and corrosion. Whether you are fabricating aerospace components, food-grade stainless steel vessels, or precision automotive parts, upgrading to an ESAB gas lens system is a cost-effective way to enhance performance.

Key Technical Benefits

• Laminar Flow: Converts turbulent gas into a smooth column, improving coverage efficiency.


• Extended Reach: Permits tungsten stick-out of up to 1 inch (depending on cup size) for better visibility in restricted areas.


• Gas Savings: Improved efficiency often allows for slightly lower gas flow rates while maintaining adequate protection.


• Compatibility: Fits widely used air-cooled (9 series) and water-cooled (20/25 series) torch bodies.