Erroneous fillet during STEP file import

[violettinged]

Importing the below STEP file into rhino leads to a wrong fillet. Basically it rounds an outer edge what should in fact be a rounded inner edge. The STEP file was created in FreeCAD-1.0.0. Importing the STEP file into FreeCAD itself or Autodesk Fusion gives the correct results.

erroneous_fillet_during_step_import.step (22.5 KB)
erroneous_fillet_during_step_import.3dm (3.2 MB)

[jessesn (Jessesn Chen)]

Thank you for you feedback, but I also get the same result after imported it to OnShape,

[cdordoni]

Look for an option when you export from FreeCAD to “Split closed surfaces”, “Split periodic faces” or something similar.

You might try IGES instead of STEP.