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3D Printed Pulleys: STL Models for Belt Drives

This collection gathers 3D models of pulleys used in belt drives, from toothed timing wheels to smooth idlers and parametric generators. Most files are meant for 3D printing on a desktop 3D printer and cover printer upgrades, small mechanisms and hobby projects. It helps you compare tooth profiles, bore sizes and belt widths before you commit to a print. 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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筛选规则：Polyzon编辑部 · 文字更新于2026年10月10日

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«3D Printed Pulleys: STL Models for Belt Drives»

The models fall into a few groups. Toothed timing wheels carry a set number of grooves and are matched to a belt pitch; smooth idlers guide or tension a belt without engaging its teeth; parametric generators let you define the tooth count, bore and width yourself; and a smaller set covers complete pulley assemblies with shafts, brackets or mounts. Some files are single parts, others are projects split across several pieces.

When choosing a model, read the author's page rather than the thumbnail. Check the tooth profile and pitch, the bore diameter, the belt width the wheel is drawn for, and whether the hub or flange is included. Look at how many parts the file contains and whether assembly hardware is described, then compare the material and print settings the author lists with what your printer and filament can hold. Photos of real prints show how the teeth and bore come out better than renders.

Search results improve when you vary the wording. Try timing pulley, idler, belt wheel, guide wheel or the name of the belt profile, and add terms such as bore, hub, flange or parametric. Related topics worth browsing include belt tensioners, extruder and hotend mounts, linear motion parts, robotics joints and general printer upgrades, since pulleys often appear inside those projects.

FAQ

常见问题

What is the difference between a toothed pulley and an idler?
A toothed pulley engages the belt teeth to transmit motion, while an idler usually runs smooth against the back of the belt to guide or tension it. Some idlers are drawn with teeth on the outside for a different routing.
How do I pick the right bore size?
Measure the shaft the pulley will sit on and match the bore on the author's page. If the bore is smaller than your shaft, the part can be reamed or drilled; if it is larger, a bushing or a new hub is usually needed.
Can pulleys be printed in any filament?
Rigid filaments such as PLA, PETG or ABS are common for low-load wheels, while filled or engineering filaments are used where teeth wear quickly. The author's page often names a material and settings to start from.
Do I need supports for these models?
It depends on the orientation and on whether the model has flanges or overhanging hubs. Check the author's notes and photos, and rotate the part in the slicer so the teeth sit on the build plate where possible.
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