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Semi Spherical Gear
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A half-sphere shaped gear for demonstration purposes and fidgeting. Print two and start meshing!
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This is a semi-spherical eight-tooth gear. It is designed to mesh with another semi-spherical gear from a variety of angles. Print two of them and see how the gears mesh and align with each other. File scales up and down in size very well.
Printable in PLA, ABS, PETG, or your choice of materials. I recommend .1 mm layer height to make smooth edges.
Designed in OpenSCAD with a for loop statement and the involute gears library.
Based on a patent from 1990: https://patents.google.com/patent/US5129275A/en