Printer parts

3D Models of Fan Shrouds, Ducts and Blanking Plates

This collection gathers STL files for fan shrouds, ducts, size adapters, mounts and blanking plates. Most of it comes from 3D printing and electronics cooling, where a printed part redirects air or closes an opening that is no longer used. It gives you a starting point before modelling your own version. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.

How this collection is put together

Polyzon assembles this collection from search results on the connected platforms. Repeats and models without a preview are removed, weak matches go to the end, and the rest keeps the search order. Models belong to their authors — check the terms on each model's page.

Selection rules: the Polyzon editorial team · Text updated 2026-10-14


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About the category

«3D Models of Fan Shrouds, Ducts and Blanking Plates»

Shrouds and ducts form the largest group: they sit over a fan and guide air toward a hot part, and they differ mainly in outlet shape, length and the angle of the exit. Size adapters join a fan to a pipe or to a fan of another diameter, while mounts, risers and brackets hold a fan at an angle or against a panel. Guards and blanking plates cover the opening itself, either to keep fingers and cables away or to close a fan position that has been left empty.

Before printing, open the author's model page and read the listed dimensions: fan size, screw hole spacing, outlet diameter and overall depth decide whether the part matches your setup. Check how many separate pieces the model has and how they join, and whether the author mentions supports, material or particular settings. Photos of real prints show more than renders, especially for thin duct walls.

If a search returns too few results, try the fan size instead of the device name — 40, 60, 80, 92, 120 or 140 mm — or the words shroud, duct, adapter, spacer, guard and blanking plate. Related topics such as radiator airflow, enclosure exhaust or a specific toolhead often lead to the same kind of part. Combining a fan size with the word adapter widens the list.

For an unused fan opening, a flat plate with matching screw holes is often enough, and it can be drawn in a few minutes if nothing in the results fits. When a part sits in a hot or vibrating place, note the material and wall thickness the author lists and compare them with your own conditions.

FAQ

Frequently asked questions

What is the difference between a fan shroud and a fan duct?
A shroud covers the fan frame and directs the airflow, while a duct extends that path to a specific point. Many models combine both in a single piece.
How do I find a blanking plate for an unused fan opening?
Search for the fan size together with blanking plate, cover or plug. Check the screw hole spacing and the plate thickness on the model page.
Which measurements matter most when choosing a fan adapter?
The fan size and its screw spacing on one side, and the pipe or second fan diameter on the other. Overall depth matters where space behind the fan is limited.
Can a printed shroud be used in a car cooling system?
Printed parts appear in low-temperature airflow paths, but under-bonnet heat and vibration are demanding conditions. Look at the material and wall thickness the author lists and judge them against your own setup.

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