The CADucopia Offset Calculator is a RhinoScript that calculates a radial offset that can then be used to create a 2D contour curve to clean up walls and contours of your part; cut parts out of flat sheet; etc. It does this from an arbitrary cutter profile and axial depth of cut.
Pictured is the right half of the tip of a 0.005 inch / 15 degree included angle / flat tipped conical cutter. Calculated is the offset for an 0.08 inch depth of cut using this cutter.
The CADucopia Offset Calculator v0.1 is coming soon. Stay tuned!