I'm a 15 Year Old Wannabe Engineer, This Is a Cycloidal Gearbox I Built
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HN · launched Aug 2, 2026 · 338 upvotes (top 1%) · 1 view
Niche: mechanical engineering and fabrication tools · 39 launches, 4 in the last 7 days ▼ -33% · Explore this niche →
Category and tags
- Horizontal
- Hardware & robotics
- Prosumer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 39 launches in mechanical engineering and fabrication tools →
Could you build this?
No Designing and fabricating a functional cycloidal gearbox requires mechanical engineering knowledge, cycloidal disc tooth profile math, tolerance analysis, and physical prototyping (3D printing/machining).
What it would actually take: Requires calculating epitrochoid / hypocycloid parametric curves with pin offset calculations, modeling the eccentric bearing and input/output pin carriers in mechanical CAD (Fusion 360, SolidWorks), and fabricating physical components. The hard parts are balancing eccentric forces, calculating backlash, and selecting appropriate bearings/tolerances for mechanical load transfer. Mechanical engineering and manufacturing skills are required.
Discussion
20 comments analyzed.
Concerns raised: Need more practical/physical application beyond theoretical design, Risk of losing craftsmanship and personal ownership when using AI tools, Formal engineering credentials/degrees still matter in some jurisdictions
Competitors
Other products that read as similar to this one : 103 launches clear the similarity bar, closest 8 shown.
Attention rank: #3 of 104 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 277 days after the earliest competitor.
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- CRAP · github · 2026-10-10 · 41 upvotes · similarity 0.49
- Built my 15-year-old game idea · hn · 2026-08-20 · 6 upvotes · similarity 0.46
- LLM weight editing tool made by a 15-year-old · hn · 2026-11-08 · 14 upvotes · similarity 0.46
- I'm a teen from Kenya and I built a package manager in Rust for fun · hn · 2026-03-01 · 6 upvotes · similarity 0.45
- I built a synth for my daughter · hn · 2025-11-12 · 1278 upvotes · similarity 0.42
- Draw a wheel. See the road it rolls on · hn · 2026-09-10 · 7 upvotes · similarity 0.41
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