Hello to all, I own a 10L lathe and am trying to make my own gears. There has not been muck luck. i know the trig. I am using a dividing indexing head. I have cutters 20DP 141/2pa and also 16DP 141/2PA. There is one more cutter i have is 18DP 141/2Pa. doing the math calls for od of 1.666 and the 18dp and 141/2pa.This does not work.With the 18 cant cut to depth without the teeth coming to a point. If there any ideas or advice would be great. Thanks to all Mirkov