January 12, 2026
Description
This duct is an attempt to better guide the air along the heatbreak. It will help to cool down the heatbreak by a homeopathic dose of °C. Because i always want to see the extruder gear moving, i never use the original cover. Even if it fits, i wouldn't use both.
Printing
walls: 1
bottom shell layers: 4
layer height: 0.16mm
infill: 0%
support: yes (optionally enable: Ironing Support Interface)
minimum feature size: 80
Screws
2x M2x10
Material
PETG is recommended over PLA. PLA Its is near its limit and will look like so, but stay in that shape:
Version 2.0 with added L-profile to prevent this bending should fix it for PLA.
See also FreeCad project file on GitHub: duct.FCStd.
License:
Creative Commons — Attribution — Noncommercial — Share Alike
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