Quote Originally Posted by A_Camera View Post
Give it a try, but expect to break many small bits.
Crikey, you must have issues with your CAM or machine!
I've never broken a milling cutter when using a helical path to cut a hole slightly larger than the cutter up to 5 diameters deep. Provided you use air nozzles to clear chips it's a very low stress job for the cutter, climb milling with a very small step over and DOC, it's a quick process too and ideal if your spindle only does high speed.
This strategy also works well for jobs where it's faster to machine an appropriate starter or guide hole then finish on a manual drill press.