Handheld Fan MK2

This handheld fan is designed to be as compact and resource-efficient as possible. With a gear ratio of 1:24.24, it delivers a cool breeze on hot summer days. To ensure smooth operation and high stability, many small details have been incorporated to maximize stability and minimize friction. A particularly vulnerable point in the print profile has also been significantly reinforced. With dimensions of 154mm x 58mm x 28mm, the device is not only very filament-saving but also very compact in relation to its performance, making it suitable for small to large hands. Since a certain amount of effort is required for operation, it can be used to pleasantly train the fingers. One should only be careful not to concentrate the force in the middle of the input gear to prevent the support from breaking. This model uses exclusively 3D-printed parts, so no tools or external parts are needed, although plastic-compatible lubricants can increase the efficiency of the device. Two different propeller variations in two different sizes each are included. One of the versions uses an outer ring to protect the hands from the rotor blades, which, however, reduces the effectiveness of the propeller. The most effective but also most dangerous propeller is the large propeller without a protective ring. No support structures are needed for printing. The included images are a step-by-step assembly instruction. I have gathered experience from various models and own creations to create this compact and effective device.