Elliptic Gear
thingiverse
The elliptic gears creation process is intricate, hence the author suggests an alternative method of creating two gears and merging them into one. However, this approach would not be ideal for a real gearbox due to its low efficiency. For fixing the smaller gear, use a screw M6 by 10mm. If scaling down to 66%, a M4 by 6mm should suffice, while at 50% scale, a M3 by 5mm is recommended. Lastly, a rubber band is needed for connecting the Wedge and Base. View the model in SketchFab (http://skfb.ly/5k3ecba) or access the SketchUp model on Google's 3D Warehouse (sketchup.google.com/3dwarehouse/details?mid=ef3699d62dd4c5f041f50478f7943c0a).
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