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Impossible Ring Puzzle- Version 2 – 3D printable model from MakerWorld MakerWorld
Puzzles

Impossible Ring Puzzle- Version 2

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At first glance this puzzle looks completely impossible — a solid structure with a ring that appears permanently trapped inside,but the secret is surprisingly simple. Hidden inside the housing are two short pins riding in an internal groove. When the puzzle is spun, centrifugal force pushes these pins outward, temporarily freeing the center pin so the ring can slide out.Shaking, tapping or rolling won’t work — it must be spun correctly.This puzzle is easy to print, easy to assemble, and makes a great desk toy. Printing & HardwareThis model is almost fully 3D printed. The only required hardware is:Dowel pins: 1. 3× Ø5 × 50 mm 2. 1× Ø5 × 40 mm 3. 2× Ø5 × 20 mm Dowel pin embedding step:The housing is designed for a pause-at-layer dowel pin insertWhen the print pauses, place the two 20mm dowel pins into their slot and resume the print Assembly InstructionsPrint all parts(Optional but recommended) Lightly sand the ends of the three outer pins so glue adheres betterApply glue to the pin hole
Category
Puzzles
Source
MakerWorld
Published
Updated
What you need to print this: Intermediate Low confidence
Why?
significant post-processing
Single piece Hardware needed
Supports 1/3
Assembly 0/3
Settings 1/3
Bed size 0/3
Post-process 3/3
Printer
FDM / FFF
File format
STL
Material
PLA
Min. bed size
50 mm (Small)
Post-processing
Sanding, Gluing, Hardware
Software
Cura, PrusaSlicer, or similar
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