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Gear and Gearbox STL Models for 3D Printing

The collection gathers gear and gearbox STL files for 3D printing: motor reducers, gear wheels, planetary sets and extruder drive gears. Many of these parts are small, so bore size and tooth shape matter more than the overall look. Comparing how different authors solve the same reduction task is the main reason to browse it. 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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Seçim kuralları: Polyzon editör ekibi · Metin güncellendi: 12.10.2026

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«Gear and Gearbox STL Models for 3D Printing»

Several kinds of parts appear here. Complete gearboxes combine a housing with an internal train and a stated ratio, while loose gear wheels are single pieces meant to mesh with something you already have. Planetary sets pack the reduction into a compact ring, parametric gear generators let you set tooth count and module yourself, and extruder drive gears belong to a printer's filament path rather than to a drive motor.

Before printing, read the author's page for the bore diameter, the tooth module and the number of teeth, since those decide whether the part fits your shaft and meshes with the neighbouring gear. Look at how the model is oriented, whether the overhangs need supports, and which material and settings the author lists. Photos of real prints show more about the finished tooth profile than a render does.

If the results feel narrow, try other wording: reducer, gear train, pinion, spur gear, planetary set, wiper motor gear, extruder drive gear. Related topics such as robotics, RC drivetrains and printer parts often hide the same geometry under different names. Searching by the motor type or by the shaft diameter can also surface parts that a generic gear query misses.

FAQ

Sıkça sorulan sorular

What does the ratio in a gearbox title mean?
It describes how many turns of the input are needed for one turn of the output. Check the author's page for the tooth counts and shaft sizes the ratio is based on.
Do these gears need supports?
It depends on how the model is oriented and on the overhangs in the housing or hub. The author's page and photos of real prints usually show the intended orientation.
Which material should I use for a gear?
Authors list the material and settings they used, and those vary between a display piece and a loaded drive part. Read that note first, then decide what your printer handles well.
Can I just scale a gear to fit my motor shaft?
Scaling changes the tooth size along with the bore, so the part may no longer mesh with its neighbour. Look for a model with the right bore, or edit the source file instead.
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