fidget gear ring with turn tool

Since some people noted that it can be difficult to break free some of my gear rings and that the one with inside knurling can be uncomfortably rough (matter of taste), I made another variant with a smooth inside, but with two grooves for a special turn tool to break it free. That turn tool also has a 6.3mm hex tool bit shaft, so it can be attached to an electric drill/screw driver to break the ring in. This ring also has a new diagonal groove knurling on the outside.

Also see my other fidget rings.

Printing: 

• 0.4mm nozzle (or lower?), 
• random seam placement,
• I use 0.17mm layer height.
• Tolerances are tight; requires a well tuned printer.

You might need to use a bit of force to break the gear loose at first, but after a bit of breaking in it is supposed to run quite smoothly.

Some tips if it doesn't turn:

• Some filaments seem to handle this better than others; silk for example seems to be prone to fuse. I used basic and matte.
• Try reducing the extrusion multiplier (flow ratio) a bit
• or use a slightly negative value for XY size compensation (PrusaSlicer), e.g. -0.02mm
  (Orca: contour -0.02, hole +0.02).

Multi-color: 

• If you have a Bambu-style multi-color setup, try adding the “turn tool (purge)” model (it has the same height as the rings) and set it to “flush into object” to convert some purge poop into something useful - see image. Also reduce the flush volumes, I used 90mm³ from bright to black and 140mm³ from black to bright.

Happy fidgeting!