How to calculate your own spindle speeds How to calculate your own feed rates

Selecting spindle speeds and feed rates can be difficult, particularly if you're not accustom to working with CNC machines. Although you can't beat years of experience, we've compiled a short list of recommended spindle speeds and feed rates. The most commonly used materials are listed, then divided according to the CNC machine. All values are modeled around the use of engraving or .25-inch diameter cutters and in most cases should suffice for most jobs. However, do remember that these rates are only approximate values; they do not take into account factors such as tooling material types, diameters, and profiles. With this in mind, we recommend performing a test cut, then changing the values according to any factors that may affect the machining of your design.

engraver @ .03 deep
Sinking=1 
Profiling=2
1/4-inch cutter @ .10 deep
Sinking=1.5
Profiling=2.75