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Servo Gear 3D Models: Gearboxes, Arms and Drives

This collection gathers 3D models built around servo gears: gearboxes and reduction units, cycloidal and planetary drives, output arms, and rack-and-pinion linkages. Most files are meant for 3D printing in plastic and then fitting onto common hobby servos or small steppers. It is a useful starting point if you are adapting a mechanism and need a gear stage that matches your own shaft and torque needs. 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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Regras de seleção: equipe editorial do Polyzon · Texto atualizado em 12/10/2026

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«Servo Gear 3D Models: Gearboxes, Arms and Drives»

The models fall into a few practical groups. Reduction gearboxes and reductor housings take a servo output and trade speed for torque. Cycloidal and planetary sets do the same job with a different internal layout, usually with more parts and a larger footprint. Arms, horns and mounts are simpler: they attach to the splined output and carry a linkage. Rack-and-pinion and linear actuator designs convert rotation into straight movement, and small replacement gears are made for micro servos where the original tooth has stripped.

When choosing a file, read the author's page rather than the preview image. Check the stated servo size or spline count, the module and tooth count of the gears, the overall dimensions, and how many separate parts need to be printed and assembled. Look at whether the design expects screws, bearings, shafts or inserts, and which material and layer settings the author lists. Photos of actual prints show how the teeth came out and whether the parts fit together without rework.

If the results are thin, try related wording. Searches for servo reductor, gear reduction, planetary gearbox, cycloidal drive, actuator or servo horn often surface files that a single phrase misses. You can also search by the mechanism you are building, such as a rover, arm or scanner, since gears are frequently published as part of a larger project. Adding the servo size or a shaft diameter narrows the list further.

FAQ

Perguntas frequentes

What is the difference between a servo gearbox and a cycloidal drive?
A gearbox usually stacks simple spur or planetary stages inside a housing, so it is compact and easy to print. A cycloidal drive uses an eccentric disc and pins, which spreads load over more teeth but needs more parts and careful tolerances.
How do I know which servo a gear model fits?
The author's page normally states the servo size or spline count, for example a micro or standard size. Compare that with the output shaft of your own servo, and check the tooth count and module if the gear meshes with an existing part.
Do these gears need supports?
It depends on the orientation the author recommends. Flat gears and housings often print without them, while overhangs on cycloidal discs or mounts may need them. The model page usually shows a suggested orientation.
Can I scale a gear model to fit my mechanism?
Scaling changes the tooth size and the fit on the shaft, so meshing parts may no longer work together. It is safer to look for a file with the right module and tooth count, or to adjust the model in CAD.
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