Air Raid Siren - hand crank version 2

thingiverse

Remix of my own design, completely overhauled with metal bearings in place to tackle friction issues that plagued the 100% 3D printed version. Runs significantly smoother now! To build this, you'll need the following metric [mm] bearings: 1 x 47/25/12 - SKF 6005-2Z 4 x 16/5/5 - SKF 625-2Z I also attempted to design it with 3D printed bearings, but they didn't quite work out as planned. Fortunately, I was able to source these standard-sized bearings in an industrial store near my town for around 35 €. Videos: Two clips are available on YouTube: Printing Timelapse and Assembly and Test. Slicer note: I used Simplify3D to slice all parts, but if you print with MakerWare, the parts might not fit together properly. This is because MakerWare doesn't account for nozzle size, which resulted in some space between each part on my preview version featured on Thingiverse. I'm unsure how Cura and other slicers work, so be sure to test it with small parts like GetrRad2A and GetrRad2B before printing larger components - they should fit together very tightly. If you own a Makerbot Replicator but don't have Simplify3D, I've included a .zip archive containing all sliced .x3g-files ready for printing, along with a README.txt in case you encounter issues getting the bigger parts printed on your R2. Designing: I utilize basic AutoCAD to create my 3D designs due to its widespread use in my professional work. It took me approximately 200 hours to design this siren, and I've included the drawing file if you wish to make any modifications. Print Settings Printer Brand: MakerBot Printer: MakerBot Replicator 2 Rafts: No Supports: No Resolution: 0.2 Notes: Most parts can be printed with standard settings - no raft, no support. However, exceptions include the following changes: Gehause3 - change filament color while printing to highlight the text GetrRad2A+B - print it solid, as it requires strength GetrRad4A+B - print it solid, as it requires strength Kurbel1 - use a brim to prevent warping Kurbel2 - print the top layers solid Rotor3 - print it with high resolution (0.1 mm) and raft for clean props Schraube1 - print it three times Schraube2 - print it six times Schraube3 - use a brim Post-Printing: If not every part fits after printing, you may need to use some abrasive paper. Parts like the rotor should be stuck together.