Hello all,
8mm threaded rod for the scrwe drive, lathed one side to 4 and the other to 5mm. To avoid damage of the screw, i used two hex nuts in the lathe.
In this picture, there is only a 5mm screw drive, but its able to lift a 6 kg hammer laying in the front of the dumping body-
One side of the dumping body:
Best Regards
Wolfgang