High Rate Gearbox for 3d Printing
grabcad
This is my take on the concept from https://grabcad.com/trinityscsp.juarez-1's wonderful model: https://grabcad.com/library/high-rate-planetary-mechanism-1I redrew all the gears by hand using the method from this tutorial: https://grabcad.com/tutorials/tutorial-how-to-model-involute-gears-in-solidworks-and-show-design-intentThe gear has the following specs:Sun: 12 teeth,1st Planet: 18 teeth,2nd Planet, 1st gear: 33 teeth,2nd Planet, 2nd gear: 32 teeth,Fixed Ring: 48 teeth,Output Ring: 47 teeth.I think that the overall gear ratio is 517.5:1, but I could be wrong :-)The parts can be printed (almost) without support material because the individual components are split into more parts that lie flat on the print bed.
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