Totally agree if your getting one bolt out at a machine shop might as well let them do them all
Lots of people think they know what to do but this is totally the wrong way to drill stainless:-
Originally Posted by Peter_C
FWIW a good cobalt drill bit will drill stainless. Start small and work up bigger to stay on center.
Drilling stainless you go for a small pilot drill then straight to the core dia of the thread.slow rpm & plenty pressure & lube ,doing it in stages you are asking for trouble either work hardening the bolt or snapping a drill in the hole
A good normal hss drill bit is perfectly adequate for stainless