Is this 3D model free to download?

Yes, Ender 3 Hotend Cap for Noctua NF-A4x20 FLX and blower for stock nozzle fan is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by decoder, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

Ender 3 Hotend Cap for Noctua NF-A4x20 FLX and blower for stock nozzle fan 3D printable model by decoder

Ender 3 Hotend Cap for Noctua NF-A4x20 FLX and blower for stock nozzle fan photo 1

Ender 3 Hotend Cap for Noctua NF-A4x20 FLX and blower for stock nozzle fan photo 2

Ender 3 Hotend Cap for Noctua NF-A4x20 FLX and blower for stock nozzle fan photo 3

Ender 3 Hotend Cap for Noctua NF-A4x20 FLX and blower for stock nozzle fan photo 4

Ender 3 Hotend Cap for Noctua NF-A4x20 FLX and blower for stock nozzle fan

Source: Thingiverse by decoder

The Ender 3 Hotend Cap for Noctua NF-A4x20 FLX and blower for stock nozzle fan is a free printable 3D model from Thingiverse by decoder. If you found this useful, please donate what you think it is worth to my paypal.me. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

277 saves Source: Thingiverse Updated 2026-10-21 License: CC-BY · commercial OK 1 makes Category: 3D Printer

Tags: airflow, cable, cap, Creality, E3D, Ender 3, hotend, NF-A4x20 FLX, noctua, optimization, strain relief

About this model

If you found this useful, please donate what you think it is worth to my paypal.me. Help cover the time of design. Thanks, Enjoy! ----- Note: Rotate the object so that the fan would point up. Print the main part with touching bed supports. Initially I wanted to put the NOCTUA NF-A4X20 FLX Cooler inside the metal case, but it looks that it gets to close to the hotend so I decided to redesign a little bit the original cap so that the cooler fits outside of it. This system still uses the stock blower. I also adapted the blower duct to fit with with the Ender3 Hotend Cable Strain Relief I recommend printing with PET-G or ABS since is pretty close to the extruder. Also, be sure to mount the cooler with the label faced to the hotend so that it will blow the air on the extruder. Notes: * This coo…

Frequently asked questions

Is this 3D model free to download?: Yes. Ender 3 Hotend Cap for Noctua NF-A4x20 FLX and blower for stock nozzle fan is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by decoder.
Who made this model?: Designed by decoder, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.