I'm going nuts trying to drill into 4mm of 316 stainless steel plate with a Gurhing Step 1.2mm (.0472inch) drill bits.Using a multiple drill system or gang drill system to make multiple holes at the same time.

I'm busting bits because I know my feed and speed are just crap.

The machine is limited to 2500 rpm or slower
It's feed is controlled by a dial that looks like a dimmer switch so has to be done by watching it go down and timing it.

Any old school suggestions would be great.