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Gear 3D Models and STL Files by Tooth Count

This collection gathers 3D models of gears: spur gears with fixed tooth counts, timing pulleys, reduction sets and replacement parts for toys and devices. Most files are made for 3D printing, so the tooth profile, bore and overall size matter more than the render. Use it to find a starting point, then check the details on the author's model page. 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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選定基準：Polyzon編集部 · 本文の更新日：2026年10月15日

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«Gear 3D Models and STL Files by Tooth Count»

The range covers small spur gears and pinions, flanged timing pulleys, planetary and cycloidal reduction units, and gears taken from toys or household appliances. They differ mainly in tooth count, module or pitch, bore diameter, and whether they are single parts or assemblies. Some are standalone gears, others arrive as a set with a housing or a motor mount.

Before printing, compare the tooth count and module or pitch with the gear it has to mesh with, then check the bore, hub and flange dimensions against the shaft. Look at how many parts the model has and whether the author shows supports or a print orientation. Material and settings listed on the page, together with photos of real prints, tell you more than the preview image.

To narrow the results, try synonyms such as pinion, spur gear, timing pulley, pulley, planetary, cycloidal or gearbox, and add the tooth count or the shaft size. Related searches like NEMA 17 mounts, robotics joints, fidget spinners or replacement parts for a specific device often lead to the same files. Changing the tooth count or the module in the query usually shifts the list more than any other term.

FAQ

よくある質問

How do I pick the right tooth count for a gear?
The tooth count has to match the gear it meshes with, together with the module or pitch. If you only have the diameter, measure it and work back to the module before choosing a file.
What is the difference between a spur gear and a timing pulley?
A spur gear has a tooth profile made to run against another gear, while a timing pulley carries a belt profile such as GT2 and often has flanges. Check which of the two the mechanism uses before downloading.
Do gear models need supports?
It depends on the orientation the author chose. Flat gears often print without them, while hubs, flanges and vertical bores may need them; the model page usually states this.
Can I scale a gear to a different size?
Scaling changes the module along with the diameter, so a scaled gear no longer meshes with the original one. If the size is wrong, look for another tooth count or module instead.
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