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Mechanism 3D Models: Gears, Locks, Linkages

This collection gathers 3D models built around moving parts: compliant mechanisms, locks, gear trains, linkages, and differentials. You can use them to study how motion is transferred or to add a mechanical function to a 3D printing project. Each model page shows the parts and settings the author chose. 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13日

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«Mechanism 3D Models: Gears, Locks, Linkages»

Mechanisms in this set range from compliant parts that bend to transfer motion to assemblies with separate gears, cams, and linkages. Locking and latching designs focus on holding a position, while differentials and parallel linkages split or redirect movement. Some entries are small fidget or desk pieces, and others are functional parts for a larger build.

Before printing, check the listed size and scale, the number of parts, and whether the author expects supports or assembly. Look at the material and settings noted on the model page, because clearances and flex depend on layer height, wall thickness, and the filament used. Photos of real prints help you judge how the moving parts fit and where friction may appear.

To narrow the collection, try terms such as compliant mechanism, planetary gear, Geneva drive, iris, latch, hinge, and cam. Related searches include robotics, automata, clockwork, and mechanical toys, which often use the same motion principles. Combining a mechanism type with a function, like lock or propeller, can surface more specific results.

FAQ

よくある質問

What is a compliant mechanism in 3D printing?
It uses flexible sections in the printed part to bend and move instead of separate hinges or pins. The motion comes from the material and geometry, so wall thickness and filament choice matter.
How do I choose between a compliant design and an assembly with gears?
Compliant designs usually have fewer parts and can be printed as one piece, while gear or linkage assemblies may offer different motion ranges and are easier to repair part by part. Check the model page for part count and assembly notes.
What should I check before printing a mechanical model?
Review the listed dimensions, clearances, support needs, and recommended material or settings. Photos of completed prints can show how the parts interact.
Can I scale a mechanism model up or down?
Scaling changes clearances and moving fits, so it may affect how parts assemble or rotate. The author's page may state whether scaling is practical or which dimensions should stay fixed.
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