This is a 3D-printable fan that uses a rack and pinion mechanism. By pushing the rack into the gear, the gear turns and drives the fan. A rubber band return system allows the rack to slide back freely without stopping or slowing the fan. This enables repeated squeezing to gradually increase the fan’s speed. The fan continues to spin regardless of when the rack is stopped or reversed.

The Fan attaches through a thread on the axle this allowes to easily switch or remove the Fan from the handle. if you want to get creative with the fans blades I leave a step file with the bare fan hub in the files section to remix.Printing and AssemblyThe model prints in separate parts and can be assembled without glue.

It is recomended to print the Shaft with the Thread in 100% infill. It tends to be weak due to its unfortunate printorientation.

You will need aditionally to the 3D Printed Parts:

2x M3x10 (or longer up to 18)Ruber BandI printed my Fan in ABS Plastics White and Orange. I used brim for better adheason and less warping. I found that ABS glides very well which is ideal for these plain bearings.

I would assume the next best material would be PLA.

PETG probably needs a bit of grease.

Happy Printing!