Radius on inside union

I have a small knob that I would like to radius an inside 90 union or junction. When I try to use radius/chamfer tool it wants to perform the function on the flat not portion creating the opposite of what I am trying to accomplish.


Probably using wrong tool, but don’t see another tool that in my mind will work.

Can you share a short video of what is the error.

Attachment available until Sep 21, 2021

Hope this assists you to understand my issue

Click to Download

Screen Recording 2021-08-22 at 8.11.15 PM.mov
440.7 MB

From what I can tell, the problem is that your knob consists of more than one body. The cylinder wall is a separate body from the bottom. Do a Union first, then the fillet radius should work (unless you prefer to have a chamfer).

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Thank you, that fixed the issue.