cleaning holes

when plasma cutting holes what type of drill bit is there that can drill threw the temper part I jus burn bits up

 

yupo...

I personally make a .060 size hole for a drill center and just use it for placement. Under-sizing a hole and trying to drill empties the wallet with ruined drill bits.

 

what the dill are you using after the material is tempered due to heat

 

I use a cobalt drill bit. Well I think they are about 5% cobalt.
Larry Cameron
RusticMetalArt

 

Go to harbor freight and get the warrior brand step bits they drill with ease and last a long time for up to 1/4" thick. For thicker I don't plasma cut the holes.