Check the making of video and how its assembled. https://www.youtube.com/Atom Fidget Spinner
Created this Atom fidget spinner in Creo parametric 3.0. Used 10 mm steel ball bearings and glue them in the printed part. Next pressed in a 608 bones red ceramic bearing and tatataaa new hand spinner done!
Print Settings Rafts: No Supports: No Resolution: 0.2 Infill: 80%