Unstuck Gears

This CAD model was designed by Oskar van Deventer, copyright (c), 12 February 2025, 30 August 1986.

Unstuck Gears was designed in 1986, but first prototyped over 38 years later. The puzzle has ten geared pieces that need to be placed onto a base with ten pins. The goal is to place the pieces such that all pieces rotate when you turn one. If one places the pieces randomly, the gears get likely stuck, e.g. in a triangle. The puzzle is very hard to solve randomly. However, the puzzle becomes much easier with some systematic thinking.

Here are some links about this design.
https://www.youtube.com/watch?v=Xp2iL5B5_Vo
https://www.etsy.com/listing/4326908847/unstuck-gears-puzzle-make-all-gears-move
https://i.materialise.com/en/shop/item/unstuck-gears
https://i.materialise.com/forum/t/unstuck-gears-by-oskar/3926
https://twistypuzzles.com/forum/viewtopic.php?t=40281

Feel free to 3D-print an extra sample to give to a friend, as long as you mention the designer and don't charge money.

If you are planning to sell some samples, then please contact me for a license agreement. The royalty fee is 10% of your selling price.

Please do not upload the design to a commercial service, or redistribute the design in any way other than linking to the YouTube video: https://www.youtube.com/watch?v=Xp2iL5B5_Vo

Enjoy!

Oskar
28 June 2025

Contact: 
https://oskarvandeventer.nl/index_contact.php?subject=Print%20It%20Yourself


