Height Adjustable Bar Stool
After some iterations of cad modeling, I did some first test cuts on the cnc. Some further improvements and a full fledged prototype out of cheap pinewood, showed that the idea was working in general, but the soft wood did bend to much on the seat and the back rest. A friend of mine did a prototype out of baltic birch plywood and this worked out just great.
Other than many of my designs I joined the parts using screws and tenons. I added some marks in the drawing to predrill holes with the cnc. After assembly I drilled the holes into the counterparts.