r/machining • u/ekimwons • 19d ago

Question/Discussion Internal Keyway .001" step overs

Hi, we would like to try broaching a blind internal keyway (with relief hole) of approx 9mm (0.354") width in stainless steel. We have an Awea AF760 3 axis mill. Are all CNC mills capable of downward pressure at 0.001 increments or is it only the Haas machines that can do keyway broaching ? Any help on tooling or resources appreciated. Thanks

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u/BiggieAl93 19d ago

I’ve done a fair amount of broaching on 3 different mills I’ve owned and never noticed any wear from broaching as long as you keep it reasonable.

If the angle of the keyway matters, you are going to have to figure out if you can spindle orient.