I want to attach a panel mount potentiometer to a PCB. But I need the bushing to be grounded. Ideally I would just make the hole for the pot thru plated but the fab does not permit really large thru plated holes. So my first attempt is two SMD pads with a thru plated hole in the middle like this:
This obviously has issues. Can anyone recommend an alternative solution?
If not, do you think this would work if I accept all of the overlap and clearance issues with these pads? Will the hole actually be through plated so that the top and bottom pads are in fact connected?
As suggested by Peter Bennett, a possible solution is to make a circle using the bStop layer to expose the ground plane:
So there would be no contact on top but I think because the tin is slightly raised and soft it should make good contact with the bushing. We'll see ...