Made for a friend who's restoring an old Bernina industrial sewing machine. Apparently this part is very hard to get ahold of. This is intended to be the form for a sand casting, but I suppose you could use it on its own as a 3D printed part.

I was working off a set of reference images and incomplete measurements kindly provided by a person on the other side of the planet, so I can't guarantee that this is an exact duplicate—I had to make some educated guesses and aesthetic choices while putting it together. Hopefully it is good enough for the restoration project.

I've included both a STEP file and an STL here. The original CAD document can be found on OnShape.

Version history

V2 – 2025-08-31

Updated with slightly better measurements.

V1 – 2025-08-02

Initial version