Not-ctua Desk Fan

Disclaimer: this project involves you talking apart a working electronic device do this at your own risk!

I had the idea that I wanted a Noctua box fan but don't have the printer to make my dreams a reality. For now a desk fan will do. 

This uses the motor from a cheap Black and Decker fan along with the mounting screws. I think a lot of other cheap fans use this motor. I found out I had another fan with the same motor. The fan can be pried apart with a flathead screw driver.

The motor is mounted via the screws that mount the motor to the fan us the holes that are directly below the motor “arms” and screw right into the back of the fan.

The motor does get warm without airflow so make sure the blades are attached while it running to provide cooling. 

From my tests the motor never gets past 100 and the screws and motor “arms” don't get much warmer than ambient (6 hours of constant running)

The Fan blades are friction fit but in the event that its too loose there is a spot for a M3 hex nut and bolt to tighten things down

To print this on Prusa MK3+ up to the core one I recommend using the 3mf file to get the print orientation right as the fan is longer than the y axis.

I recommend printing the body at 50% for strength and the rest can be printed at the default 15%. There is also a foot on the back to keep it from falling back and provides a nice tilt. There is a tight version of the foot you will not be able to get this off so I recommend the looser one if you want to modify it.

The switch is attached by 2 M3 bolts and nuts and the cord keeps the back plate on.

This is still kind of a work in progress. I may try to come up with a better way of attaching the cover in the future.

Non-Affiliate links

fan: https://www.amazon.com/Decker-inches-Frameless-Tabletop-Number/dp/B06WP6CY4G

brown filament:https://www.amazon.com/ELEGOO-Filament-Dimensional-Accuracy-Carboard/dp/B0CFV5SK67

Beige liniment: https://www.amazon.com/ELEGOO-Filament-Dimensional-Accuracy-Carboard/dp/B0CFV5SK67