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Cube Spinner: Two Versions (Loose or Grooved)

3D model description

Cube Spinner: Two Versions (Loose or Grooved)

If we make a circular cut around a vertex of a cube, we get a spinner after adding a bit of tolerance. The structure has a strong aesthetic appeal. My first experiment was given to a little kid in my math class, who said he likes it so much and he wanted to keep it. Of course, I said yes, with the parent’s approval.

To keep the core from coming out, we can add a groove. So I tried it, based on my previous work on spinning structures. It turns out to be a great math toy!

There are two versions here (with two sizes), both of which can be printed in one piece at a resolution 0.1mm. The loose one allows the core to come out so one can see its inner structure. It is easy to separate. The grooved one calls for a bit of wiggling but still works well according to my experiments. Be patient! Loosen the two pieces, clean up the edges as necessary, and turn it around for a few minutes for smoother rotations. A drop of lubricant may also help. Have fun!

3D printing settings









Please use a high resolution for the grooved version (0.1mm). Please do not scale them down because of the tolerance.

Wiggle a little bit, loosen the two pieces. Clean up the edges as necessary and turn it around for a few minutes for smoother rotations. A drop of lubricant may also help.

  • 3D model format: STL


STEAM educator, learning from and working with K-12 STEAM teachers to explore new ideas of teaching and engagement. I firmly believe ART is at the core of STEM learning or all human learning! I owe my ideas and designs to the hundreds of K-12 children and teachers and university professors I have had the pleasure of working with, in multiple disciplines-- math, science,engineering language arts, social studies, early childhood education and more! All mistakes, of course, are mine! There is no warranty or liability whatsoever implied or explicit behind the designs or ideas. They are all posted for their potential educational values.

When working with children, please strictly observe all safety and health procedures! Please refer to the NSTA safety guides:




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