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3D Models of Gearboxes and Reducers

This collection gathers STL files for gearboxes and reducers, from planetary units to motor mounts and cutaway industrial models. You can find keychain-sized versions and functional assemblies for 3D printing. It helps you compare mechanisms and choose a model that matches your printer and project. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.

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Auswahlregeln: Polyzon-Redaktion · Text aktualisiert: 12.10.2026

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«3D Models of Gearboxes and Reducers»

Planetary gearboxes use multiple gears around a central sun gear, while motor-mounted versions combine a gearbox with a DC or stepper motor. Industrial-style reducers often show a cutaway view of worm, bevel or spur gears, and keychain or fidget designs focus on a small, hand-operated mechanism. Manual and automotive gearboxes may include reverse and clutch elements for shifting demonstrations.

When choosing a model, check the author's page for the overall size and scale, the number of parts and how they assemble, and whether supports are needed. Look at the material and settings the author lists, and examine photos of real prints to see how the gears mesh. For moving parts, clearances and tolerances matter, so a test print of one gear can help before printing the full assembly.

To refine your search, try synonyms like reducer, transmission, gear train, or speed reducer. Related topics include planetary sets, worm gears, spur gears, motor mounts, and fidget spinners. You can also search for specific functions such as reverse, clutch, or torque conversion to find models that match your project.

FAQ

Häufige Fragen

What types of gearboxes can be 3D printed?
Common types include planetary, spur, worm, and bevel gearboxes, as well as motor-mounted and manual shifting mechanisms. Many models are designed for demonstration, fidget use, or small mechanical projects.
How do I choose the right gear ratio for a 3D printed gearbox?
The gear ratio depends on the speed and torque you need. Check the model's description for the ratio or count the teeth on the gears, and consider that higher ratios usually mean lower output speed and higher torque.
What materials work well for gears and gearboxes?
PLA, PETG, and ABS are common choices. The author's page often lists a recommended material and settings; for parts that slide or mesh, a material with good friction properties can reduce wear.
Can I scale a gearbox model up or down?
Scaling changes clearances and tolerances, which can affect how gears mesh. If you scale, test a small section first and adjust the slicer's horizontal expansion or clearance settings as needed.
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