Edit : Cartisky3D made a review of this model (without weights) on youtube

=> short and video

Hi,

Concept:

I designed a mechanical clock to better understand clock mechanism.

I could get this clock to run 42 s with a single rewind of the PLA spring.

It might run longer with other kind of filament.

Please let me know if you beat my record ;)

No hardware is needed but you will get a longer runtime if you weight with “InertiaWheel” with some M4 bolts.

I know my design can be improved and I greatly encourage remixes.

You can find my source file on Onshape here.

Printing:

It is an easy print. I recommend using Arachnee to get the right spring thickness. I also recommend using 100% infill for the InertiaSpring to add some weight to it.

Assembly:

There is a quite a lot of parts (which makes the assembly satisfying) but assembly is straightforward based on the 2 exploded views below.