Spinity is an experiment in micro-engineering and minimal design — a 2mm-thin wearable ring built around a real micro ball-bearing.

Unlike friction-based spinner rings, Spinity uses a true bearing structure with a precisely machined inner–outer clearance, allowing the outer ring to rotate smoothly for over 20 seconds with a single flick.

The challenge behind Spinity was simple to describe but difficult to achieve: Can a real bearing system be compressed into the thickness of a normal ring without losing rigidity or comfort?

Across dozens of prototypes, we explored:

deformation behavior in ultra-thin stainless steel

micro-bearing alignment and tolerance stack-up

heat-affected distortion during laser processing

surface finishing vs. structural integrity

wear resistance in daily use

ways to miniaturize rotational inertia while keeping the ring lightweight

Spinity isn’t meant to be flashy. It’s a quiet engineering object — part jewelry, part fidget tool, part mechanical curiosity.

If you’re interested in the technical side of the project or want to follow future developments, you can find updates here:

https://spinity.co/