Devendra Badgujar
Forum Moderator

Hello Thomas Schmidt

You can also try this method as this should help you create small rounds with 0.01mm in SpaceClaim.

The model must be imported into a small unit space window of SpaceClaim in order to make changes smaller than 0.1mm.

Save the model as STP.

Then, close all open windows in SpaceClaim, leaving you with a gray screen.

Go to File > SpaceClaim Options > Units, and in the length, nanometer and micrometers will be available.
Select one of those small unit options. (This change will apply to all new documents).

Then, open a new blank design. The unit space should be small units (you will see a small red icon in the top right corner of your SC window indicating the small unit space).

To import your model, go to the Assembly tab and click the Insert File button.

Then you will be able to edit your part with small units. 

Let me know if this works for you. Thank you.