3D-Printable Mechanical Watch Movement

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3D-Printable Mechanical Watch Movement

A functional mechanical watch movement designed in one-shot by Claude Opus 5.5

byA.k.a Pifagor

Watch Escapement challengeOpen source

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Description

A precision-engineered mechanical watch movement featuring a lever escapement and 18,000 bph, generated entirely via an OpenSCAD script from a single AI prompt. The design achieves 0.05mm tolerances, allowing for a 3D-printed resin assembly that successfully ticks and maintains mechanical timing.

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Details

Why this is interesting: A staggering capability proof, showing an LLM generating complex, functional precision hardware with 0.05mm tolerances.
Attributed to: A.k.a Pifagor@pifagor_dao
Built with: Opus 5.5
Links: View tweet
Tags: #mechanical #3d-printing #horology #openscad

Discovered: X
First posted: X · Sep 26, 2026
Listed: Added 2h ago
Build: Strong
Models: Strong

Prompt

You are a precision mechanical engineer specializing in horology. Design a complete 3D-printable mechanical watch movement: lever escapement, 18,000 bph, 7mm escape wheel diameter, 0.08mm tooth tip clearance, full parametric OpenSCAD output with calculated gear train ratios for 36hr power reserve. Include: mainspring barrel dimensions, full gear train (3rd wheel / 4th wheel / escape wheel), pallet fork geometry, balance wheel with adjustable timing screws. Output: complete.scad file with all modules, assembly tolerances of 0.05mm, and a bill of materials with bearing specs.

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