Cobalt bits and LOTS of cutting fluid. If you see smoke you don't have enough fluid.
The smaller the bit the faster you need to go. For example, I was doing some 1.3mm holes the other day (depth about 6mm) and I'm using 3K RPM. After I used a centering bit to start the hole.
Norseman or CTD --- Magnum super premium 135degree split point... by either company do well...
Bits made to drill SS do so... Use thick cutting fluid not thin tapping fluid..
Have a Fastenal near by? you can get either mfg bit from them...
Hybrid Mode
