Classic gyroscope toy. Cannot be printed in PLA or it will be impossible to assemble due to rigidity of PLA. PETG preferred.
Designed in F360
Source: http://a360.co/2oJmZRo
Non printed parts:
Uses CAD or USD pennies for mass. The cavities are 10mm deep and 19.2mm in diameter.
Uses 2 typical skate bearings for the bearing - same one as all the spinners.
Uses two smooth rods, 3mm diameter by 75mm, for the axle. 3mm rods are common in CD drives, which is where i got mine from. Shorter rods will likely work but should be at least 56mm. Any shorter and the gyro may break when the ripcord is pulled.
Uses 3 or 6 10 mm M2 screws.