The resources which I usually recommend on this are:
- the defaults in Carbide Create — these are quite conservative, but work well as a starting point
https://shttps://www.youtube.com/watch?v=mhqjhD0XJl0hapeokoenthusiasts.gitbook.io/shapeoko-cnc-a-to-z/feeds-and-speeds-basics
and the videos at:
which @Radiation noted.
Another resource is:
from the company which @TDA works for.