Quote Originally Posted by WESTERNAERO View Post
Don't argue with me Bob.
Look at the circled area, this is why I say ball endmill and full radius on the key. Notice the pinched pressure area, there already cranks in there, in you can bet on it.
Attachment 33792
That circled area is the end of the old slot. We cut the shaft and extended the slot. It shows that the key rolled or tilted a little in the slot. Would a ball end mill slot with matching key eliminate that or be worse?