Actually I have made a spindle for my CNC machine. Works great and I use it for larger bits. Lately I have been using 1/8" carbide two flute bits which I like to run a bit faster than my home brew spindle. Routers can be less than precise. I have 3 Porter Cable routers and only one is good enough for my CNC machine. It just happens to be the one I replaced the spindle bearings on. So with the new spindle bearings and selecting from several collets I find a set that has very low runout.

Yes it has 3 axis. Never went to 4 or 5 and probably won't. I just like it for cutting out flat plate and using it for accurate layout of holes etc. Everything else is done on manual machines.

Here is a link for the thread on my CNC. The 4th link down on that page is for my home brew spindle.
http://www.homemadetools.net/forum/c...6078#post65886
Thanks for your comments,

Cheers, JR