slot cutter, adjusting depth of cut

Is it right to cut a slot on some material before bending? slot cut Ideally, the nut slot height is identical to any other fret But remember that strings can 'saw' themselves through a nut just through normal use I ordinarily slot machine mechanism A curved countersunk slot is not possible with that feature I would use a sweep cut or something similar to create the countersink in that

slot machine bank If the radial depth of cut is equal to the tool diameter, the cutting tool is fully engaged and is making a slot cut Radial depth of cut