Aluminum Conduit

[Tekman]

Can anyone tell me if you need to use a special die to thread aluminum conduit?

[BHD]

I have not threaded much of it, but when I have I did not us any thing special, jsut regular ridgid pipe dies for my 12R or 11R heads . some times on aluminum using ws40 or kerosene helps over oil (at lest on my milling machine).

http://forums.mikeholt.com/archive/index.php/t-80226.html
there is another discussion and seems a little more to the point,
http://www.electriciantalk.com/showthread.php?t=2734 the basic statement is to use new and sharp dies.

these suppliers say "Threading – Sharp dies and conventional cutting oil should be used."

http://www.alliedeg.com/pdf/atc_alum_4p_specs_0704.pdf

http://www.bpmmetals.com/pdf/suppliers/indalex/Indalex%20Rigid%20Aluminum%20Conduit.pdf

this place is the same, some more info on the page

http://www.shomal.com/products/conduit.htm