Adapter for Bosch GEX 18V-125 sander and vacuum cleaner

For the Bosch GEX 18V-125 eccentric sander, I have designed an adapter that fits a commercially available vacuum cleaner hose with an outer diameter of 35mm.

As can be seen in the photos, the side that is attached to the sander is flattened in two places. Exactly at these points, there are two conical screw threads inside the bore. This allows the adapter to be easily and repeatedly pushed onto the sander and then tightened by approximately 45° to the right. This ensures that it sits firmly on the sander and cannot slip off.