Hi All,

Hoping to get a sanity check on something I need to cut, it's 4140 steel, I believe it's annealed, but checking on that now.

I need to cut a radiused bottom (about 0.5" radius) slot, 0.08" deep and about 0.7" wide. I plan to use a 1/2: HSS ball endmill.

Gwizard tells me to cut it at 1390 rpm and says I can go up to 105 ipm. Does that sound right to everyone?

Terry