Clicky Ratchet Fidget – Print-in-place

The fidget for people who love the sound of a ratchet wrench. One print, zero assembly:

• 16 internal teeth + 2 spiral flexure pawls — every few degrees of rotation gives a tactile, audible click. Both directions work.
• Prints fully assembled: the rotor rides in a captive 45° tongue-and-groove bearing (the same interlock as our Orbit Spinner) with 0.5 mm clearances — flex it once to free it, then it clicks for life.
• Pinwheel rotor with through-cut blades — it looks like a tiny turbine.
• Knurled mushroom knob in the center: pinch the waisted grip and rip it — spin it fast for a zipper-like brrrrp, or roll it slowly for single deliberate clicks. Two completely different fidget moods, one knob.
• Scalloped outer ring + keychain lug — the collection's signature machined look.
• Every surface vertical or 45° — no supports, no bridges to fail, ~30 minutes.

The satisfying part: the pawls are springs made of the print itself. No metal, no pins — the compliance is in the geometry.