This is a radial fan, which is made out of 3 different pieces:
You will also need 2 machine screws and Nuts (M4) to attach the bottom case to the top. You also may need to sand down some parts a little bit. The dc motor I used has a diameter of about 24mm and the shaft diameter about 2mm.
I printed all parts with following settings:
Layer resolution: 0.3mm
Printer: Flashforge Dreamer
Designed with Fusion360