This is a blower fan I designed. I equipped this fan with a 775 motor, which provides incredibly strong power.
You need 6 M3×10 self-tapping screws and a 775 motor.

The impeller is installed on the 5mm rotating shaft of the 775 motor by press-fit. At present, it is running stably and there has been no loosening or falling off yet.

Fill density 100%
It is printed using PLA.
There's no need to add a support structure.