Ball Lock Puzzle
Source: Thingiverse by ricswika
The Ball Lock Puzzle is a free printable 3D model from Thingiverse by ricswika. Here's an amusing little puzzle I'm sure you never saw before because I just invented it. You can download the STL file from the original listing below and print it at home.
About this model
Here's an amusing little puzzle I'm sure you never saw before because I just invented it. I've been calling it the z=xy puzzle; read on to find out why. It is a more complex version of my 2 piece cube puzzle, but now including a magic ball lock. It is part puzzle, part magic trick, part math lesson. The theory that makes it work comes from pure mathematics. Once the cube is closed and locked by rotating the ball, the cube is held closed by invisible mathematical forces. Normally, a sphere would not be retained in a hemispherical cavity, but not in this case. What gives? You start with the cube in two halves, each side holding half of a ball. Show your victim, I mean the audience, the inside of the cube and point out how the inside surfaces are all smooth with no overhangs to hold the cube …
Frequently asked questions
- Is this 3D model free to download?
- Yes. Ball Lock Puzzle is free to download from Thingiverse. Click the "Download free STL" button above to open the original listing.
- Where is the STL hosted?
- The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by ricswika.
- Who made this model?
- Designed by ricswika, published on Thingiverse. Please credit the creator when sharing your print online.
- Can I print this at home?
- Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.
Similar 3D models in Ball
