bobcat 225 and tig alum

[retiredIW]

need to tig an aluminum oxygen cylinder base back on to cylinder what setting to use with weldcraft tig torch and argon gas.i know i have to scratch start on a piece of copper, it is 3/16 thick aluminum. machine is bobcat 225NT

[BC Iron works]

you need a high-frequency arc starter and stabilizer
like the miller HD-251 to weld aluminum with the bobcat
they run around $1000.00

[fabricator]

Why copper?

[Craig in Denver]

I hope you're only making something decorative. There's NO welding allowed on any high pressure cylinder. Not even during manufacturing.

[retiredIW]

I hope you're only making something decorative. There's NO welding allowed on any high pressure cylinder. Not even during manufacturing.

it is to be part of a cold smoker no pressure

[retiredIW]

Why copper?

it supposedly dont eat the tungsten

[fabricator]

Thats a new one for me.I think you were misinformed.However you will need high frequency a/c in order to tig aluminum.

[Speedddy]

You can use Heilum to weld alum But it's not as clean.Rent a bottle for a month will it be cheaper.

[turbo38t]

You can DC tig aluminum......why wouldn't it work with the Bobcat?

Thats a new one for me.I think you were misinformed.However you will need high frequency a/c in order to tig aluminum.

[FusionKing]

it supposedly dont eat the tungsten

I do not doubt one bit that there is a place for the copper thing...I have heard it as well but it is not used for aluminum. Trust me I did about 10 years on a 225NT Bobcat with an old Linde Freekbox and a #26V torch with a valve and pure argon. That is the minimum you will get by with unless you can score lab grade helium for using DC EN.
You should just find someone with a spoolgun or hire a pro to tig it for just welding one item.
Bring your stuff and come on down to my shop and I'll do 'er for free
I like to shoot the bull with old welders