Quote Originally Posted by russell View Post
Another difference is that a in a router the cutter makes all moves while in a mill the work is moved, principally in the horizontal plane. There are of course many exceptions. Spindle speeds are usually higher in the router.

Russell.
Of course! I'm working on my new router design that has a fixed gantry and moving bed so forgot about that one completely!

Russell, OT slightly, but would it be fair to say that spindle speed (used) would be determined by the material being worked?