This is my print in place fidget ring design. The concave inner ring keeps the convex outer ring in alignment and allows it to spin freely without any assembly need. I have included a section view of this geometry below. If you enjoy the design a like or make would be appreciated.

Check out my new Banana Switchblade here.

You can obtain a commercial license to sell prints of this here.

Instructions

• Estimate your finger diameter then select the ring with the corresponding inner diameter.
• The ring prints in place and no assembly is required.
• I recommend printing with an outer brim.
• The gap between the two rings is 0.25mm. If this gap is too small for your printer, scale up the outer ring in the x and y direction until the inner and outer ring no longer fuse together.
• Adding some generic plastic lubricant significantly reduces friction and allows the ring to spin for much longer.