I've been looking at servo motors to use as a spindle motor on my X2 milling machine. What exactly am I looking for in specs? For instance, this one:

Pacific Scientic Servo Motor R33GENC-R2-NS-NV-00 Untested | eBay

I have no idea what I need for torque (stall torque...peak torque...) and all the information could just as well be in Greek. I've been looking at compumotor and pacific scientific motors on ebay. But I am hesitant on buying something that may be too small and underpowered.

Can any of this be simply explained?

Mike