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Re: CADing Gears
I definitely agree that you should either download the CAD file from McMaster-Carr (et cetera) or utilise the Toolbox. If not, a "simple" CAD will suffice--i.e., a cylinder. If you actually want to CAD the gear, however, I believe that you attach half an ellipse to a circle & use a Rotational Sketch Pattern to surround the rest of the circle.
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~junefish
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Thirty-nine decimal places of pi suffice for computing the circumference of a circle girding the known universe with an error no greater than the radius of a hydrogen atom.
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