01-09-2014, 08:52 PM
An end mill will probably cut the cleanest, and at .2 deep you'll probably have no trouble. I've tried end mills cutting deep mortises but my mill tops out at about 3200 rpm and they tend to burn, a carbide router bit seamed to do better, the router bit handles the shavings better.
Free advice is worth exactly what you payed for it.
Greg
Greg