Cube Spinner: Two Versions (Loose or Grooved)

thingiverse

Two Versions of Cube Spinner: Loose or Grooved When we make a circular cut around a vertex of a cube, adding some tolerance creates a spinner that has a strong aesthetic appeal. I first tested this with my math class, where one student loved it so much he wanted to keep it. With the parent's approval, I let him take it home. To prevent the core from falling out, we can add a groove. Building on my previous work with spinning structures, I tried adding a groove and found it makes for a great math toy! Here are two versions of this cube spinner (with two sizes), both of which can be printed in one piece at 0.1mm resolution. The loose version allows the core to come out, letting you see its inner structure easily. Separating the pieces is simple. The grooved version requires some patience - loosen the two parts, clean up any rough edges if needed, and spin it for a few minutes to smooth out the rotations. A drop of lubricant may also help. **Update**: For the 30mm grooved version, I added a loose one with a 0.8mm space around the core, which can be printed at 0.2 or higher resolution. It's easier to prepare and spin than before. Have fun!