On 5/26/2010 5:13 AM, Joe AutoDrill wrote:
A 11132-3 Rotabroach on a P/N 11123 arbor at 250 RPM

I think I agree. Hougen all the way... But maybe slower RPM if you can
figure out a way to do so... That hand drill is probably going to be too
fast. Cycle on and off quite often to let the tool tip cool off, etc. You
want as little heat as possible there.

Push HARD on the tool until breakthrough or that stainless will kill the
tool. Maybe put some cooking oil on it to cool it off if you don't want
real cutting oil anywhere near it.

Yes, stay under the skin and avoid work hardening.
A moment's inattention and you will have a journal bearing
instead of a hole.

Consider clamping a chunk of 2x4 behind the sheet so
you can maintain high pressure as you break through.

--Winston