This is actually very simple math that people that claim they want to be machinists continue to refuse to learn. For metric values, the formula is: RPM = ( Desired cutter speed expressed m/min X 1000 mm/m ) / ( Pi X Diameter mm ). Be sure to do the math operations with the correct Order of Operations.
In your case, you are limited in RPM by your machine. So, take your maximum RPM and calculate the feed rate with: Feed = RPM X # of teeth X desired chip per tooth.