From FreeCAD Documentation
- Create a
Body and add a
sketch on one of its base planes.
- In the sketch create geometry for one quadrant of the part (i.e. the upper right quadrant).
- Note that the constraints must also only cover a quarter of the part, e.g. instead of the full dimension of
150mm
enter 150/2mm
or 75mm
.
- Make sure the sketch is closed by adding lines along the vertical and horizontal axes.
- Extrude the part with
PartDesign Pad.
- Select
PartDesign MultiTransform.
- The task dialog opens.
- The last feature of the Body is already selected. Since we want to mirror that feature we can ignore the Add feature and Remove feature buttons.
- Right-click in the Transformations field and select Add mirrored transformation from the context menu.
- For the Plane select Vertical sketch axis.
- If the Update view checkbox is checked, you should now see the part mirrored about one axis.
- Again select Add mirrored transformation from the context menu of the Transformations field.
- Now for the Plane select Horizontal sketch axis.
- Press the OK button to finish.
- To remove the edges along the axes of symmetry in the final result, set the DataRefine property of the new feature to
true
in the Property editor.