this is version 2.1 of my wall gears project

it is a kinetic sculpture project consisting of several sizes of gear wheels

I created a custom backplate for the gear box to turn the dual motor gear box into a single motor unit

I recommend adding some sort of rubber feet to the back of the fame to reduce noise transfer into the wall, i just used generic 3/4" grommets

its a good idea to use some silicone grease on all the pivot points and in the gearbox

parts list

frame: https://canada.michaels.com/en/grey-shadowbox-by-studio-decor/M20001818.html?dwvar_M20001818_size=16%22%20x%2020%22&dwvar_M20001818_color=Grey

switch: https://www.digikey.ca/en/products/detail/te-connectivity-alcoswitch-switches/4-1825136-8/1021809

velleman motor: https://www.velleman.eu/products/view?id=437496

Tamiya Motor: https://www.amazon.ca/dp/B001Q13BIU/?coliid=IS356GNQQU2T6&colid=2IGANTE7G4IQO&psc=1&ref_=lv_ov_lig_dp_it_im

4XAAA battery holder: https://www.thingiverse.com/thing:456900/files

UPDATE

Added pre-shelled gears for use if you are unable to print in vase mode (mainly for non FDM printers)

also added smaller gear size

3D PRINTING SETTINGS
gears are printed in vase/ spiralized mode with standard bottom layer thickness of around 1.45mm

gearbox should be printed at 100% infill, if your printer is not well calibrated to will have to do some post-processing work to make the shafts fit. I just heated up the shafts/bushings with a torch and pushed them into the plastic for a perfect fit

the only thing that will need supports is the switch cover an its only a 10 minute print anyway