Screwdriver Ventilator & compressed air alternative Toroidal Design

You don't have a compressor but want to remove dust, wood shavings or other light dirt from your workplace? No problem! With this attachment for your cordless screwdriver, it's done in no time at all!

Is it hot and you need to cool down? No problem! With this attachment, you can easily give yourself or others a breeze!

Some time ago I had already designed these propellers as attachments for cordless screwdrivers with drill chucks. With the old version, however, you always had to "sacrifice" an adapter to be able to use the propeller. So when I needed this adapter somewhere else, it was quite inconvenient.

That's why I completely redesigned the attachment and this time all parts are 3D printable.

Important note:
As with any other 3D jerked part rotating at high speed: Do not use damaged parts, use as little brittle material as possible and avoid braking the propeller abruptly! This could cause damage to the printed parts and catapult the parts through the air.

Nevertheless, I printed my prototype in PLA to test it and check its stability. That worked very well for me. My recommendation as a material is PA-CF!

Prerequisites

Of course you need a cordless screwdriver with a drill chuck (min. 10 mm Diameter)! The higher the speed, the more wind you get :)

If your screwdriver turns very slowly, the amount of wind produced may disappoint you! Please check beforehand whether your cordless screwdriver is capable of at least 2000 revolutions per minute!

Different Versions:
I designed a normal and a “dupio” version. Both work fine but I think the dupio has some more wind :D But it also goes together with more mass (failure potential)

Printing Instructions

As mentioned I recommend filament that is not too brittle! I printed my parts with a 0,4 mm Nozzle and 0,15 mm layer height, 100% Infill, 3 perimeter with the propeller & 5 Perimeter with the axis.

Assembling Instructions

The axis and the Propeller come together as a pressfit. If the fit is too tight for your tolerances you can cut off the corners of the axis a little, sand it down or skale it down a little bit.

Speed:
The wind produced naturally changes depending on the speed. With my cordless screwdriver, I get good results with 1850 rotations/min and with 3800 rotations/min it is like a storm! :)

Have fun!

Fun tipp: You can print more than 1 propeller and scale up the length of the axis.