A great marble pump with crank handle

thingiverse

I designed this assembly as an entertaining project for my kids, who thoroughly enjoy it. The components were crafted using freeCAD, and to ensure smooth integration, I uploaded all STL files into Blender for assembly checks. **Instructions** Each component was meticulously bonded to a wooden panel with Epoxy adhesive. Firstly, I glued the spiral components together. To facilitate this process, a 10mm hole was incorporated inside each piece, allowing them to be easily mounted onto a shaft. Notably, the bearing brackets feature a recess that aligns perfectly with the Spiral Bevel Gear on one side. Lastly, it's crucial that the marbles have a diameter of approximately 15mm to maintain balance and stability within the assembly.