I came across reference to a feed & speed calculator for CNC high speed machining, HSM Advisor, on a CNC forum and downloaded the 30 day trial to give it a try.
It allows creation of a machine profile with power and torque settings and even a torque graph to optimise material removal and tool life, it can also collect data from and insert data into text boxes in other software packages making it quick & easy to get it's output into your software.
I have no association with the product other than being a happy customer but though it worth mentioning here as I've not seen reference to it before despite reading through a lot of stuff on CNC forums,

- Nick