Tetris T-piece Fidget Spinner

thingiverse

The simplest way to achieve a T-Spin is by executing the correct sequence of moves.\r\n[Video demonstration](https://youtu.be/cW69HsGnT2c)\r\n[Making-of video](https://youtu.be/rVPdZJ_i9vw)\r\n\r\n**Assembly instructions**\r\nYou will need to print \r\n- 2x Main components\r\n- 1x Handle A\r\n- 1x Handle B\r\n\r\nIn addition, you will also require\r\n- 3x 608Z Ball bearings\r\n- Adhesive\r\n\r\nPlace the three bearings on the holes in the main component, sandwiching them between the two pieces. Secure them together with adhesive.\r\nThen, through the hole in the center bearing, insert the handle pieces and secure them together with adhesive.\r\n\r\n**Important notes**\r\n- The bearings may rattle inside, dissipating energy and reducing spin time. Applying adhesive to fill the gap can eliminate rattling.\r\n- Due to the asymmetrical nature of the T-tetrimino, balancing the center of mass on the spinner is extremely challenging. I experimented with various bearing placements through trial and error. Although my printer settings and bearings work well, your printed spinner may be unbalanced due to varying bearing weights and printer settings.\r\n- The spinner measures 9cm in length, which is the smallest size that accommodates three 608Z bearings within a T-shape. This size is slightly too large for a standard spinner, making it difficult to spin with one hand. You can create a smaller spinner by using smaller bearings.\r\n- The models were created using Blender, which is not ideal for CAD work. You may encounter unusual geometry in the model. I apologize for any inconvenience this may cause.\r\n\r\n**Printing guidelines**\r\nEnabling brim is not recommended as it can be difficult to remove cleanly. If you experience poor bed adhesion, enable brim instead. Disable supports and ensure your printer is well-calibrated to avoid issues with the prongs and bearing holes having a tight tolerance.\r\n\r\n**Printer settings used**\r\n- Creality Ender 3 printer model\r\n- PLA filament from Sondori\r\n- Sliced using Cura 3.6\r\n- Nozzle temperature: 200°C\r\n- Bed temperature: 55°C\r\n- Layer height: 0.2mm\r\n- Infill percentage: 20%\r\n- With brim enabled, no supports used\r\n\r\n**Disclaimer**\r\nI am not affiliated with Tetris and request that you do not sue me.