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That's some fine CNC gymnastics Do you bring the X axis back to the reference point each time you rotate the 4th axis?
Don
What is the extra piece on the left hand bracket for?
Impressive parts - but why did you not let the CNC do the holes in those parts ?I mean - that would ensure total accuracy with regard to placement and angles ....Yes you would have to change tool, to do the final 'Reaming' for the axle, but ....Per
Achim,I always admire your skills and love the way this engine is coming together. Two questions?What screw threads are you using? I ask, because the nuts have nice proportions. Small metric nuts are all the wrong shape for models. They are intended for ease of tightening and not for looks.Have you anodised the cylinder heads? They look greatMike
Most of the screws and nuts at these engine are metric "Modellbauschrauben" and "Modellbaumuttern", M1.6, M2, M2.5, M3.Here a German source with dimensions https://knupfer.info/shop/index.php/deutsch/modellschrauben-schwarz.html
Unfortunately the fallout from Brexit had made importing stuff from Germany much more expensive. Suddenly many suppliers and their shipping companies are adding special surcharges and then there can be import duty and more VAT taxes to pay.