I have a shopbot standard, I'm cutting a 4'11" x 3" piece with a bunch of 51/64" (20.1mm) holes and some 1.5" (38.1mm) grooves. The material is MDF and the Depth of the material is 1/2". Everything is going through the material. Please help.

I would like to know what RPM's, Feed Rate (in/sec), and plunge rate should be?

What type of bit should i use?

Thank you for your time.