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3D Models of Gears: Fidget, Planetary and Mechanical STL

This collection gathers 3D models of gears, from fidget toys and spinners to planetary assemblies and functional mechanical parts. Many files are designed for 3D printing as print-in-place mechanisms, which means they come out of the printer already assembled. You can use them to study gear ratios, build a custom mechanism, or just keep your hands busy. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.

Il testo di questa raccolta è in inglese; la ricerca funziona in qualsiasi lingua.

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Polyzon compone questa raccolta a partire dai risultati di ricerca dei siti collegati. I doppioni e i modelli senza anteprima vengono rimossi, le corrispondenze deboli finiscono in fondo e il resto mantiene l’ordine dei risultati. I modelli appartengono ai rispettivi autori: verifica le condizioni sulla pagina di ciascun modello.

Criteri di selezione a cura della redazione di Polyzon · Testo aggiornato: 10/10/2026


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«3D Models of Gears: Fidget, Planetary and Mechanical STL»

The collection includes several distinct kinds of gear models. Fidget gear toys and spinners are built for interaction, often with a shifting or rotating action. Planetary gear sets show how a central sun gear, planet gears and a ring gear work together. Print-in-place designs combine moving parts in a single print, functional components like extruder knobs serve a specific mechanical role, and parametric generators let you create custom gears and racks.

When choosing a gear model, check the size and scale first, as well as the number of teeth and the module or pitch if listed. For print-in-place models, look at the clearance and tolerances the author mentions, since these affect whether the parts move after printing. Review whether supports are needed and which material and settings the author recommends. Photos of real prints on the model page can show how the gear looks and functions in practice.

To refine your search, try synonyms such as cog, pinion, spur gear, helical gear or rack and pinion. Related topics include Geneva wheels, gearboxes, reducers, transmissions and mechanical kits. You can also combine terms like parametric, customizable or print-in-place with gear to narrow results. Adding a specific function, such as fidget, spinner or extruder, helps separate toys from functional parts.

FAQ

Domande frequenti

What is a print-in-place gear model?
It is a design where moving parts are printed already connected, so no assembly is needed. Check the author's page for the required clearance and printer calibration.
How do I choose the right gear model for my project?
Look at the module or pitch, number of teeth, and overall size. The author's page often lists these details and recommended print settings.
Can I scale a gear model up or down?
Scaling changes the tooth size and may affect how well gears mesh. It is better to use a parametric generator if you need a different size.
What materials work for gears?
PLA, PETG, ABS and nylon are common. The choice depends on friction, wear and load; the author's page may suggest a material.

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