The file '40mm, 30mm, & 80mm Fan Compressor Turbines 3D Printer Model' is (stl) file type, size is 5.1MB.
Sandwich this between your fan and mount for more concentrated and laminar airflow. This is about as aerodynamic as I could get it. The plate is 7mm thick and the cone is 20mm dia and protrudes another 13mm. The holes are 3mm. I printed one and it actually works well. One is adjusted for a .4mm nozzle, the other is for .2mm. This video inspired this thing https://www.youtube.com/watch?v=rDq4KSlZcTo&t=124s Happy Printing! The 30mm fans have a 15mm cone diameter, are 5.25mm thich, and the cone protrudes 9.75mm.
For the Ducts I recommend using screws that protrude past your fan up to 5mm and adding a non permanent adhesive, like glue stick, in the holes to secure it. The ducts will likely require supports on the sides during printing. I had a 60mm version, but the "high compression" variant doesn't really work, so I deleted it.
30mm_fan_compressor_.2mm_nozzle.stl | 1007.9KB | |
30mm_fan_compressor_.4mm_nozzle.stl | 1008.4KB | |
40mm_Fan_Compressor_Turbine_0.4mm_nozzle.stl | 1010.6KB | |
40mm_Fan_Turbine_0.2mm_nozzle.stl | 1.0MB | |
40mm_Intake_duct_.2mm.stl | 2.7MB | |
40mm_Intake_Duct_.4mm.stl | 2.7MB | |
40mm_Minimalist_Duct_.2mm.stl | 2.4MB | |
40mm_Minimalist_Duct_.4mm.stl | 2.4MB | |
80mm_turbine.stl | 971.8KB |