CRAP
CRAP: Cycloidal Reducer Algorithm & Parametrizer. Parametric cycloidal gearbox generator (build123d): give it bearings, motor, ratio and eccentricity; get collision-checked, toleranced STEP/STL parts and a live 3D web GUI.
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This is 1 of 110 launches in computer-aided design software — see how it stacks up on momentum and crowding →
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Details
- External ID
- 1413646435
- Source
- GITHUB
- Company
- —
- Product
- CRAP
- Website domain
- github.com
- Launched
- Oct. 10, 2026
- Cohort
- —
- Upvotes
- 36
- Upvotes percentile
- 0.63
- Tags
- build123d, cad, cycloidal-drive, parametric-design
Enrichment
- Niche
- computer-aided design software
- Vertical
- Manufacturing
- Function
- Dev tools
- Audience
- Prosumer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- parametric cycloidal gearbox generator for 3d cad models
- Manually corrected
- False
Could you build this?
Partial The web UI and standard parameter inputs can be vibe coded, but generating precise cycloidal tooth profiles, collision checks, tolerances, and parametric CAD geometry requires specialized mechanical engineering math and build123d/OpenCASCADE expertise.
What it would actually take: A complete system uses Python with build123d (or CadQuery wrapping OpenCASCADE) running cycloidal curve equations (epicycloid/hypocycloid gear geometry) coupled with Three.js for 3D visualization. The difficult components are the exact geometric tolerances, contact stress approximations, and collision avoidance algorithms needed for physical 3D-printable or machinable parts.
Competitors
Other products that read as similar to this one — 18 launches clear the similarity bar, closest 8 shown.
Attention rank: #9 of 19 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 318 days after the earliest competitor.
- I'm a 15 Year Old Wannabe Engineer, This Is a Cycloidal Gearbox I Built · hn · 2026-08-02 · 338 upvotes · similarity 0.49
- I engineered a 2mm micro-bearing D20 ring that free-spin for 20 seconds · hn · 2025-11-26 · 23 upvotes · similarity 0.38
- PARAMATTER · ph · 2026-09-18 · 2 upvotes · similarity 0.37
- I made a vertical-pedalling bike with a novel drivetrain [video] · hn · 2026-05-07 · 26 upvotes · similarity 0.36
- genpark-smoothed-particle-hydrodynamics-sph-skill · github · 2026-09-10 · 7 upvotes · similarity 0.34
- genpark-smoothed-particle-hydrodynamics-sph-skill · github · 2026-09-10 · 7 upvotes · similarity 0.34
- Turbo Electronic Actuator SA1150 · ph · 2026-10-10 · 1 upvotes · similarity 0.34
- Spin The Wheel 3D · ph · 2026-09-28 · 2 upvotes · similarity 0.34
Other launches for this product
- No other launches for this product.