Al-Jazari's quarter-gear water-raising machine (1206) - 3D-printable desk model
https://aljazari.trieflow.com/build-al-jazari-water-machine-model/

Print: 4x quarter wheel, 4x runged wheel with ladle, 2x side frame, 1x crank (one ladle: 1 + 1 + 2 + 1).
PLA, 0.2 mm layers, 3 walls, 20% infill, no supports.
Upper axle: 1/4 in (6.4 mm) square dowel, ~150 mm. Lower axle: 6 mm round dowel, ~140 mm.
Slide the quarter wheels onto the square axle, each turned 90 degrees from the last.
Glue the side frames to a base board about 115 mm apart (4 ladles) or 50 mm (1 ladle).
Licence: CC BY 4.0 - Ibn al-Jazari channel (YouTube @IbnAlJazariDevices).
