Anyone ever use an 4 flute highfeed endmill. I am looking for the speed and feed for a 10mm 1m rad solid carbide it is a YG1 . The recommend feed and speed in the book is 6400rpm 551ipm .0039 stepdown. I ran it and not good. I looked in OSG book and they have same cutter and same feed and speed. I ended up running it at 6400rpm 200ipm it looked ok put think it could be better. It cut to parts prehardend h13 42rc 7x10tapered down 3inch with almost no wear.
Any help on the speed and feed would help new to this highspeed machinig.
Thanks
Mike