Originally Posted by
SCzEngrgGroup
If you're after good finish, get a face mill with lots of inserts, and a rake, and inserts, appropriate to the specific material. Insert geometry and finish makes a HUGE difference!
I don't know where you get the idea two inserts will in any way improve balance. The more cutting edges, the better the finish. And on hard materials, you'll be running a low spindle speed, where balance is unlikely to be a significant factor at all. I have 3" and 4" face mills with 5 and 6 inserts, and they both leave a near mirror finish, and will cut as deep as spindle power allows.
Regards,
Ray L.