Tetris T-piece Fidget Spinner

thingiverse

The easiest way to T-Spin. [Video of it in action](https://youtu.be/cW69HsGnT2c) [Making-of](https://youtu.be/rVPdZJ_i9vw) **Assembly instructions** You'll need to print - 2x Body - 1x HandleA - 1x HandleB And you'll also need - 3x 608Z Ball bearings - Some glue Put the 3 bearings on the three holes on the body, sandwiching them between the two body pieces. Glue them together. Then, on the center bearing, stick the handle pieces through the hole, and glue the handle pieces together. **Some notes** - The bearings may rattle inside, which will dissipate energy and reduce the spin time. You can apply some glue to the bearings to fill in the gap and stop the rattling. - Due to the asymmetric nature of the T-tetrimino, it is very hard to balance the center of mass on the spinner. I went through some iterations, trying to find a balanced placement of the bearings through trial and error. And although the model kinda works for my printer settings and bearings, the spinner you print may be out of balance depending on the exact weight of the bearings and the printer settings. - The spinner is 9cm(3.5in) in length, which is the smallest size that I could get it while fitting 3 608Z bearings inside a T-shape. This is a little too big for a spinner and you may find it quite hard to spin in one hand. (I got pretty big hands, so I can kinda manage.) You can probably make the spinner a lot smaller if you use smaller bearings. - The models were created in Blender, which isn't that great for CAD work like this. You may encounter some weird geometry on the model. Sorry about that. **Printing instructions** Brims are hard to remove cleanly on this model, so disable brim if possible. If you have poor bed adhesion, enable brim. Disable supports The prongs and the bearing holes have a tight tolerance, so make sure your printer is well-calibrated. **My printer settings** Creality Ender 3 PLA filament from Sondori Sliced on Cura 3.6 Nozzle @ 200℃ Bed @ 55℃ 0.2mm Layer height 20% infill With brim No supports I don't own Tetris please don't sue me