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LEGO-Style Gears and Technic STL Models

This collection gathers STL files for gears and related parts built around LEGO-style and Technic-style geometry. It covers single gears with fixed tooth counts, racks, compound gears and motor adapters, so you can build a gear train for 3D printing. The collection helps when a particular tooth count or ratio is hard to find as a physical part. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.

このコレクションの本文は英語で書かれています。検索自体はどの言語でも使えます。

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選定基準：Polyzon編集部 · 本文の更新日：2026年10月14日

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«LEGO-Style Gears and Technic STL Models»

Gear models here fall into a few families. Spur and bevel gears carry a fixed tooth count, from small pinions up to large rings, and the tooth profile decides how they mesh with neighbouring parts. Racks and pinions convert rotation into straight travel, while double and compound gears place two tooth counts on one body to set a ratio. Motor adapters and clutch parts sit between a gear train and a shaft.

Before printing, open the author's model page and read the stated dimensions: outer diameter, tooth count, bore or axle hole and overall thickness. Check whether the download is one part or a set that needs assembly, and whether the geometry calls for supports. Tooth profiles are thin, so the material and settings the author lists, along with photos of real prints, tell you more than the render does.

You can narrow the search by tooth count, gear type or the system the part belongs to. Synonyms are worth trying: spur gear, pinion, bevel gear, worm, differential, axle, motor adapter. Related topics include gearboxes, planetary reductions, turntables, tracked drives, and figure or accessory packs that use the same connection points.

FAQ

よくある質問

What tooth counts appear in these gear models?
Titles mention a spread from small pinions to large rings, usually written as a number followed by T. The count is the first thing to match when you pair two gears.
Do printed gears need supports?
It depends on the file and on how you orient it. Flat gears often print without them, while hubs, axles and racks may need them; the author's page usually says which case applies.
Will these parts fit existing building sets?
Many models are drawn around Technic-style geometry with axle holes and common tooth profiles. Printed tolerances vary between machines, so test a small part first and read the author's notes on scale.
Which material is used for printed gears?
Authors usually name a material on the model page. Stiff filaments are common for display parts, while gears that carry load are often printed in tougher ones; the listed settings are the starting point.
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