3mm shaft vacuum turbine

thingiverse

This redesigned version, without spacers and resized, is based on RichMac's original. I transferred the files to AlibreCAD for a 3mm shaft, and used hex insets so 3mm locknuts provide ample torque. While it may not produce significant power, it effectively makes it spin without requiring spacers; you need three or four 623 bearings, two or four 3mm locknuts, and at least 35mm of 3mm socket cap screw (50mm+ recommended). The vacuum design also fits a smaller hose (28mm wide). Testing for usable torque is ongoing, along with improvements on AlibreCAD's screw threads. Print two rotors, one stator, and one housing; assemble by pressing bearings and locknuts, pushing the axle through, and screwing the parts in place. Attach to a vacuum and enjoy the spinning air and potential cat annoyance.