I have not had trouble drilling stainless using cobalt drills unless you back off on the pressure - then the stainless hardens and even the cobalt has trouble - the solution is to go to a carbide drill to break through the hardened area and then if you are drilling deep, go back to cobalt. I've made a few things that involved drilling ball bearings - for that (they are hard, really hard) heat and anneal first, then drill, then re-harden if you want.
-----Original Message-----
From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of doug
Sent: Saturday, February 24, 2018 4:24 PM
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] VDG
Traditional cutting torch will not cut SS.
Doug
-----Original Message-----
From: jimlux
Sent: Saturday, February 24, 2018 12:55 PM
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] VDG
On 2/24/18 9:12 AM, doug wrote:
> I think you will find that the SS globe is VERY hard SS, Your best
> drill will probably only scratch it. The best way I have found is to
> nest the globe in something and use a dermel with the "TINY" cutoff
> disc that comes with it. That little disc is only .026 X 1" and goes
> through like butter.
> Doug
This is why if you have access to someone with a plasma cutter, it's great. It's what plasma cutters were invented for, since traditional cutting torches use pure oxygen to do the cutting.
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla