smallest alumina tigcup ?

jethro · Jan 20, 2014

I am designing an extremely tiny electric heating device where I want to pass flowing argon over a filament and shoot out the hot argon out to be used for heating. I am thinking of using a tiny tig cup (a long nosed extended one maybe) and I want the smallest one I can get. I have not seen one smaller than a # 4 ........ is there a #2 or a #1 ??????? I would like a hole in it about 1/8 or less where the gas comes out.
How small do they make ? (cant use pyrex- only alumina )

Tim

Silicon-based · Jan 20, 2014

If this is not for welding, get some alumina tubing from McMaster-Carr and make an adapter for a standard inert gas fitting that will slip over the alumina tubing. Use the flowmeter or a separate needle valve to control the gas flow.

John

jethro · Jan 20, 2014

I was thinking of making a tiny reducer to go on a # 4 tig alumina to reduceit down to a large bore stainless needle like a "canula" used for blood drawing.
I am shooting for 1500 degree (F) argon as output- so I woul dhave to weld the stainless canula somehow ...... (laser weld ?)
and adding a needle valve and a tiny flow meter.

Tim

smallest alumina tigcup ?

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