My personal rule for bits 1/4" and smaller, is cut depth = tool diameter, unless the machine is not rigid enough. In some cases you can cut deeper. Your machine will likely flex way before the tool does.mplsartist wrote: That's something I didn't know! I thought that the general rule of thumb was to have pass depths at half of the bit diameter.
I've accidentally cut corian with a 1/16" bit using a 1/4" depth of cut, with no problems. Chip evacuation is a bigger concern with smaller bits.
As for whether or not your spindle has enough power, you'll need to try it and see. Does your control software have a feedrate override feature, where you can adjust the speed while cutting?