Full disclosure: I know very little about TIG welding. I’m okay with a MIG rig, and I can stick weld well enough to hook things together, but I’ve never handled a TIG torch. So when I received a press release from Weldcraft indicating that they’d expanded their gas lens line a bit, I had to hit the ‘net to discover that a gas lens is simply a fitting that re-directs the gas normally emitted from the torch, focusing it to provide more even coverage and flow for a given welding situation.
It makes sense to me, then, why Weldcraft would be proud of offering a relatively wide range of lenses in standard size, large diameter, and stubby to fit just about all their air and water-cooled TIG torches.
Gas Lenses Improve TIG Welding Performance [Weldcraft]