Fidget BB Bearing - Knurled

Hi! This model of a spinning fidget bearing is made up of two pieces 3D printed, and filled with airsoft BBs, which are cheap and easily available. They ensure a smooth rolling, and the external surface is knurled for better grip. They are easily inserted by alignind the holes, and once they are no longer aligned BBs cannot exit and the structure is solid. Scale on X and Y axis if needed to change tolerances, bot tighter or looser. Easy and very fast print for hours of fun! Ps. I printed in PLA metal green and worked out fine as PLA is tough and smooth and better interfaces with BBs, but also PETG-CF in black (in photos), which looks very fine even if a bit rougher on the surface. Enjoy!