Drilling Stainless Steel

From:  Cliff Fahrer [SMTP:cfahrer-at-In-Touch-dot-net]
Sent:  Friday, May 29, 1998 9:05 PM
To:  Tesla List
Subject:  Re: Drilling Stainless Steel

Tesla List wrote:
> ----------
> From:  terryf-at-verinet-dot-com [SMTP:terryf-at-verinet-dot-com]
> Sent:  Thursday, May 28, 1998 4:50 PM
> To:  tesla-at-pupman-dot-com
> Subject:  Drilling Stainless Steel
> Hi All,
>         Like many people, I like to use two large 12 inch salad bowls as a
> top terminal.  For my new one, with built in current sensors, I had to drill
> 5 holes through the bowls.  WOW! was it hard.  The stainless steel in those
> things must be very high in chromium content or something.  I trashed a
> number of nice drill bits.  The titanium nitride bits work for a moment then
> just slide on the surface.  If anybody has any better ways to drill nice
> holes through this stuff, I would love to know about it.
> Thanks,
>         Terry Fritz
> terryf-at-verinet-dot-com
>         or
> terryf-at-peakpeak-dot-com

Try drilling at a slow speed, (100 to 200 rpm), with a drill press using
steady pressure. Also use high carbon bits and keep them cool with light
oil. Another good point is to clamp the part you are drilling. If you
hold the part steady, the hole will be round.

Hope this helps!