Diego, actually I think do have a thing that may help… let me have a look around.
@DiegoKrause - This can probably use some work but it might help - for instance as is, it only accepts surfaces, not brep faces - that should be easy enough to fix but it tells me I probably thrashed this out fairly quickly for some immediate task. At any rate it reports back max and min radius at the pick point and leaves a point object named accordingly so you can go back later.
SrfRadius.py (759 Bytes)
To use the Python script use RunPythonScript, or a macro:
_-RunPythonScript "Full path to py file inside double-quotes"
-Pascal