Cetus 3D 60mm fan mount with gate for filament cooling regulation

thingiverse

This is my design for a custom mount for a 60 mm fan, such as the Noctua NF-A6x25 5V, that allows for adjustable airflow to the nozzle for filament cooling. It consists of an "IN block", an "OUT block", and a "gate". The gate is inserted into the out-block after a bit of sanding, then the out and in blocks are glued together. The alignment is straightforward due to centering holes. The in-block splits the flow into three parts: top, central, and bottom extruder sections. The opening of the latter can be controlled by the gate, which adjusts easily to 5 positions: 0%, 25%, 50%, 75%, and 100% opening. A toroidal opening directs airflow towards the nozzle, compatible with a standard pipe wrench for easy nozzle removal. Before installing the fan, the entire assembly should be screwed onto the extruder using original screws and mounting holes. Then, add the fan using its provided screws. Note that the Noctua cable can be directly connected to the Cetus fan slot after some sanding to reduce its size. Be careful with polarity when handling cables. This design was created with OpenSCAD, but the source files are messy, so only the rendered STL is being published.