Like @Tshulthise I got my baseline numbers from gwizard, but I tend to shy towards slower then faster. It’s easier to wait longer then wreck and expensive piece of wood. Most everything I cut is hardwood with some plastic and aluminum thrown in for fun.
In the finishing pass I speed up because I’m only taking a 10% stepover. I should mention while I chose 115in/min feed, I still limited plunging rate to 60 or 70. The whole finishing pass took about an hour. Roughing was about 4 hours. In roughing I left .02" of stock. Overall size is 15" diameter. 0.6" thick.