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Coupling and Fitting STL Models for 3D Printing

This collection gathers STL files for couplings and fittings used in pneumatic systems, Bowden extruders, hose connections, and threaded adapters. It helps you find a starting point for 3D printing parts that join tubes, threads, or shafts. Check dimensions and thread standards before printing. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.

Il testo di questa raccolta è in inglese; la ricerca funziona in qualsiasi lingua.

Una raccolta di Polyzon · 47 modelli da 6 siti

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Polyzon compone questa raccolta a partire dai risultati di ricerca dei siti collegati. I doppioni e i modelli senza anteprima vengono rimossi, le corrispondenze deboli finiscono in fondo e il resto mantiene l’ordine dei risultati. I modelli appartengono ai rispettivi autori: verifica le condizioni sulla pagina di ciascun modello.

Criteri di selezione a cura della redazione di Polyzon · Testo aggiornato: 13/10/2026

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«Coupling and Fitting STL Models for 3D Printing»

Pneumatic quick couplings often include a threaded body and a release collar, while Bowden fittings are smaller and center on a push-in tube connection. Hose couplings tend to use barbed or threaded ends for flexible tubing, and flange or shaft couplings connect rotating parts with a clamp or bolt pattern. Parametric thread adapters appear where a standard thread must be changed to another size or standard.

On the author's model page, check the thread type and pitch, tube outer diameter, and the number of parts in the assembly. Look at whether the model needs supports, what material and layer height the author lists, and any photos of real prints. For parts that see movement or load, review the wall thickness and how the coupling locks into place.

Try synonyms such as coupler, adapter, connector, nipple, or reducer, and add the tube or thread context you need. Related searches include pneumatic fitting, Bowden fitting, hose connector, and shaft coupling. If a result is close but not exact, look for parametric versions that can be adjusted in CAD before export.

FAQ

Domande frequenti

What is the difference between a coupling and a fitting?
A coupling usually joins two similar ends, while a fitting can adapt, reduce, or redirect a connection. In 3D-printed parts, the terms often overlap.
Which measurements should I check before printing a coupling?
Check thread size and pitch, tube outer diameter, hose inner diameter, and the distance between mounting points. The author's page often lists these values in the description or drawings.
Do pneumatic and Bowden fittings use the same threads?
They can share thread sizes, but the tube retention and body shape differ. Compare the thread callout and the tube diameter rather than relying on the name alone.
How can I find a coupling for a specific tube size?
Search by the tube outer diameter plus terms like pneumatic fitting, hose connector, or push-in fitting. Add the thread type if the part must screw into a housing.
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