Air raid siren V1.1

the handle must be made through with a metal bolt as the plastic does not withstand loads

printable hand siren with planetary gearbox.
v1.1
reinforced sound wheel frame has been added

I will add
to connect the gear of 12 teeth with the gear of 27 teeth, I use steel 8mm studs in size
. My shaft is an 8mm stud with a length of 235-240 mm
. I take bearings in size from the catalog and measure the dimensions with a caliper. this is for those who could not figure out which bearing would fit there

now the war can start anywhere and you may need to notify your loved ones and neighbors urgently as never before, but electricity and communications will no longer work, in which case you will need this thing