Planetary gear fidget spinner with herringbone gears.

Most other similar fidget spinners you can find here are print in place. Because of that their gears are either to loose or they're tight and require break-in period before they can run smoothly.

That is why this model is not print in place and you will need to assemble it after printing. However assembly is fairly simple and it will only take a few minutes. Gears should run smoothly without need for break-in period.

Assembly instructions:

1. Place the ring gear on the star. Make sure that the surface that was on the print bed is pointing up.

   

2. Place the planetary gears on the pins on the star. Make sure they are oriented correctly.

   

3. Insert the larger part of the sun gear. You'll have to move the sun and planet gears until everything lines up.

   

4. Press down on the sun gear until it's flush with the top surface on the ring gear.

   

5. Carefully flip the whole assembly 180 degrees and place it on a flat surface and then remove the star.

   

6. Take the second half of the sun gear and line it up with the planetary gears. Make sure that the surface that was on the print bed is pointing up.

   

7. Carefully press down on the sun gear until it snaps into place. Make sure that the gear teeth on the upper and lower part of the sun gear are lined up.

   

8. In case that two parts of the sun gear are not staying together, you'll need to add few drops of super glue to make sure they stay connected.