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String-Powered Spinner Gyroscope Using 608 Bearings

3D model description

####String-Powered Spinner Gyroscope Using 608 Bearings

Please observe all safety rules when spinning things. Perhaps do not spin them too fast, just fast enough to show the behavior of a gyroscope.

Few things are as captivating and mind-boggling as a toy gyroscope! Now, if you have a few 608 bearings (22mm, 8mm, 7mm) such as those from a fidget spinner or skateboard, you could make a simple string-driven gyroscope using the parts in this design. You need 6 bearings; at least one is of decent quality. Be prepared. It spins fast.

Here is the story. Kids like playing with those fidget spinners, which are technically a gyroscope. I saw a kid trying to spin it faster using a rope, to no avail. So I brainstormed a bit and designed a wall around the central bearing and then added a few grooves to enable string wrapping. With that “wall,” we can now wrap a string around it and spin the things really fast! Of course, we need a long axle in the middle to support the gyro and also for the grasp. Further, a stand would be useful for us to observe the whole dynamics of a gyroscope. It works great!

####Among the Files
1. A spinner, with a spool/wall, that requires 6 bearings: 20mm or 25mm Spool.
2. An axle that is to be inserted into the middle bearing: 95mm or 115mm.
3. A stand.

####To Assemble and Play

  1. Look for a string that is about one yard or meter long.
  2. The axle has a diameter of 7.9mm. It works well for me at a resolution of 0.18mm. Just push it in; it should be a bit tight. If it is too loose, please consider using a drop of super glue or some adhesive tape. If it is too tight, sand it a little bit.
  3. Wrap the string around the spool (using the two holes if you like). Hold the top or bottom part of the axle. Pull to launch; leave it on a surface or the stand to ponder … .
  4. Why does it work? Try some mathematical and physical analysis if you like.
  5. If you have a fast spinner already, all you need is the axle. Remove the covers of your spinner and install the axle. It should work well.


  • 3D file 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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