This is part spinner, part wheel. It uses a 3" O-ring as a tire and is a good spinner, but is also fun to roll across the floor or desktop. Leaning at an angle will make it roll in a circle back to you. And the spiral is flexible enough to act like a spring, so it even bounces. Uses 608 bearing without seals and lube.
Update 3-5-17- Added a 3-arm version of the 3" wheel. Added 3 and 4-arm version of 4" wheel, added a solid center wheel that takes a size 223 o-ring (1 7/8" O.D., 1 5/8" I.D., 1/8" diameter). Also made a pusher that you can use as an alternate means of launching.
Included are pics of part numbers and dimensions for 3 and 4 inch o-rings I got at Ace hardware, if I were doing a bunch of these I would find a source to buy them cheaper in bulk online. I found some 3" o-rings at Amazon - https://smile.amazon.com/gp/product/B0051XZ6KU/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
2 spiral wheels can be combined to make a good optical illusion similar to some other designs I've seen out there, but with bearings for better spinning. I use the small dowels shown in the picture to connect the 2 wheels, available at Ace Hardware, or probably any hardware store.
Videos of the launcher and optical illusion
https://youtu.be/_Di3f4jw_Aw
https://youtu.be/R-DSSmePoXE
| 3inWheelWithBearingSpiral.stl | 2.3MB | |
| 3inWheelWithBearingSpiral3arm.stl | 2.4MB | |
| 4inWheelWithBearingSpiral3arm.stl | 2.5MB | |
| 4inWheelWithBearingSpiral4arm.stl | 2.6MB | |
| CenterKap4.1CirclepatternNEW.stl | 1.6MB | |
| SpinnerWheel223.stl | 2.4MB | |
| WheelPusher.stl | 111.7KB |
