I have struggled with this seemingly simple problem long enough. The smaller through hole is angled to match the surface. I need the surface of the countersink seat to match this angle as well. I guess the reason I cannot figure this out is related to the fact I cannot even describe it in words. Hope this picture helps. Help appreciated.
Draw the hole cutter as a two-stage object with the two diameters and some extra length. Then place it as required for the slant and use either Intersect Faces with or a Solid Tool to subtract it from the slab. This was done using the BoolTools2 version of Difference, but the idea is the same for the other Solid Tools sets.
Not sure how the “two-stage” process works. Are you referring to two concentric circles of different diameters?
Part of your description to me seems to contradict other parts.
Is this what you are after:
- the plate is angled 9 degrees
- the threated rod is horizontal
If yes, then the hole also needs to be horizontal.
Follow @slbaumgartner’s advice and intersect a horizontal hole object with an angled plate.