Air blower machines are a simple and effective electrical device used in homes and industries to blow away dust from every nook and corner.The file cab be 3d printed but you should care about the overhang areas, and make some modifications that can help you to easly 3d printed. About the motor you should have Stator and rotor, however if youu want to mount DC electric motor this can be done but you should add holes where the motor be mounted.