Keychain Siren Whistle

Easy and fast printing (only 6 gram).

Once you have printed, place the fan in the housing. Note the orientation: see image for the correct direction.

Click the lid into place and blow hard....

Adding a drop of oil to the shaft improves the friction on the fan and therefore gives much better performance!

Update 05-03:

Due to several feedbacks about stucking fan's, I reviewed the original printprofile and shared it as V2.

Because friction is a major factor for proper functioning I added ironing to all important surfaces.

I also decreased the hight of the fan by 0.2mm to allow a little more space between the fan and the lid.

(the original space between them was designed as 0.4mm what in some cases required sanding)

Please use at least a drop of lubricant to enhance the spinning even more. It may be any kind of oil…

* I fine-tuned the clamping of the lid by scaling the lid in X-Y. Adjust this in small increments of 0.2% if you find it clamping too hard or too soft. 

(-0.2% for tighter clamping, +0.2% for lighter clamping)

* If the blade gets stuck (or does not rotate properly), lightly sand both sides of the blade on a flat surface. (only applies for original print profile's)