I'm trying to remember how to calculate cutting a shallow, but relatively large radius on the end of a round rod on a knee mill. The procedure is to tilt the head to some angle and make a pass across the end of the rod for the desired depth. The resulting cut has a much larger radius than the endmill. In my case, the rod is 1" dia and the desired radius is 1.5". Seems like I used a 3/4" endmill the last time I did this many moons ago.
I realize I could make several test cuts until I get the right radius, but I was hoping someone has done this before and has an idea how to figure the head angle.
Thanks guys. Dick & Dr Pete have the same answer, so it must be right! Dick, where in the Cincinnati text did you find the reference? I found an older PDF of the same book, but haven't found the discussion on angled cutters yet.
Kiwi - thanks for the empirical estimate - very close to the calculated value.