Buy at
https://www.shapeways.com/mode... Copyright (c) 2014, M. Oskar van Deventer. Corn Gear is a gear-design exercise. The teeth of the gears are wound in a helix around a cylinder at a 13:5 angle. Two mirror-image corn gears can roll over each other at 0 degrees, like normal gears, but at 90 degrees as well. The corn gears can also roll over a flat gear bed.
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