Hart's Cube Puzzle

by RoCMP, published

Hart's Cube Puzzle by RoCMP Feb 24, 2017
13 Share
Download All Files

Thing Apps Enabled

Open in Customizer Order This Printed View All Apps

Design Tools



Hart's Cube Puzzle by RoCMP is licensed under the Creative Commons - Attribution license.

Liked By

View All

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.

Print Thing Tag

Thing Statistics

4609Views 1218Downloads Found in Puzzles


The puzzle was designed by Geoge Hart and published in one of
his puzzle pages: http://georgehart.com/Puzzles/CubePuzzle
It consists of two identical pieces that match to form a cube
by turning one piece in respect to the other. The two pieces are
separated by cutting the cube by a helicoid surface.
This code models a puzzle cube very similar to the Hart's one
but it is based just on his description and images and may be
a bit different.
The hardest part of the coding have been to deal with a constant gap between the pieces. I am in debt to Rudolf Huttary (http://www.thingiverse.com/Parkinbot/about) for his clever solution to the computation of the helicoid offset.
The stl files were generated for a 50mm cube. The code has some customizable parameters so you can create your own variant.

Print Settings

Printer Brand:












There is no special printing requirements. The only concern may be the gap between the pieces which is customizable. The stl files where generated with a gap of 0.2mm. Some trial and error may be needed.
Another possibility is to print both pieces already assembled. I have not tried that but I would suggest a bigger gap because there is no way to separate them after printing with an utility knife.
The file CubeScrewAssembling.stl was not intended to be printed. It may help the understanding of the piece match by using the Thingiview.
I would like to thank Helena Leitão who have printed the model for me in PLA.


I had to file the pieces a bit to get a good fit and smooth movements. Do not file too much because they will tend to be loosed with the use.

More from Puzzles

view more

All Apps

Customizer is the easiest way to take great 3D printable designs and make them your own. Make your OpenSCAD designs infinitely more valuable by empowering the community to customize them.

App Info Launch App
Customizer Thing App

Auto-magically prepare your 3D models for 3D printing. A cloud based 3D models Preparing and Healing solution for 3D Printing, MakePrintable provides features for model repairing, wall thickness...

App Info Launch App

Kiri:Moto is an integrated cloud-based slicer and tool-path generator for 3D Printing, CAM / CNC and Laser cutting. *** 3D printing mode provides model slicing and GCode output using built-in...

App Info Launch App
KiriMoto Thing App

With 3D Slash, you can edit 3d models like a stonecutter. A unique interface: as fun as a building game! The perfect tool for non-designers and children to create in 3D.

App Info Launch App

Print through a distributed network of 3D printing enthusiasts from across the US, at a fraction of the cost of the competitors. We want to change the world for the better through technology, an...

App Info Launch App

Treatstock is an online platform that offers decentralized manufacturing services such as 3D printing and CNC machining for clients all over the world. We offer free and instant access to comparati...

App Info Launch App

3D print your favourite design with NinjaPrototype, a professional 3D manufacture with consistent quality and speed.

App Info Launch App

Nice! They are a cool gift.

I don't know how many of these I've printed. At least a dozen. I keep giving them away.