Ultimate Bearing Gear Spinner (Print in Place)

Use a small amount of lubricant oil in the bearings for a smoother experience and a longer spin time. Lubricant oil tubes are included with all Bambu Labs printers.

This bearing gear spinner combines two interlocking herringbone gears, each spinning smoothly on its own internal roller bearing system. Using a bearing instead of a standard print-in-place joint is unusual for a fidget like this, but it makes the spin dramatically smoother than a regular pin joint ever could. The gear teeth mesh together so spinning one wheel drives the other, letting you flick either side and watch the motion transfer between them. Each bearing hub is a scaled-down version of my previous viral bearing fidget, shrunk down and re-tuned so the rollers still spin freely and smoothly at the smaller size. A separate connecting handle rests on top, spinning freely around both bearing hubs and giving you a third way to interact with the mechanism. This fidget is entirely print-in-place, meaning it comes off the build plate already assembled and ready to spin with no additional hardware or post processing. The bold gear teeth and dual-bearing design give it a satisfying mechanical look, while the wide, chunky handle offers a comfortable grip for one-handed spinning. This fidget is perfect for anyone who loves clever mechanisms and craves that buttery-smooth spin.

Printing Instructions:

1. Prepare the Print Bed
   • Clean the print bed thoroughly with isopropyl alcohol to ensure proper adhesion.
   • Additional adhesive for the print bed is highly recommended! I suggest using 3D-Lac spray or a glue stick.
      
2. Download the Print Profile
   • Send the pre-configured print profile to your Bambu Lab printer through the Bambu Handy app or Download and open the pre-configured print profile in Bambu Studio.
      
3. Select Your Printing Options
   • Choose your filament type and color.
   • Select your print bed type (e.g., textured or smooth).
   • Confirm your printer settings, ideally for a Bambu Lab printer.
      
4. Start Printing
   • Begin the print job. No supports are necessary.