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Published on May 2, 2011
Here's my 3D print from Shapeways.com of my "Hand-Crank Fan" model.
This model is a single print with six moving parts, and is designed for Shapeways' nylon white strong & flexible material. The entire model is 3D printed (using selective laser scintering) with all of the parts in position; nothing is assembled post-production.
The 1:9 gear ratio (made from two sets of gears each with a 1:3 gear ratio) makes the fan blades rotate nine times for every single rotation of the crank. The grip of the handle freely rotates as well.
The test to design and 3D print an intricate model with moveable parts was successful. However, the fan itself is quite possibly the most inefficient one ever created.