Parametric Involute Spur Gear
grabcad
This is a plain and completely parametric model of involute gears. It's meant to serve as a base for further gear customization. To modify it, go to Tools > Parameters.. from there, you can change the parameters' values: Pd - Pitch Diameter Phi - Pressure Angle k1 - Addendum Ratio (a = k1/Pd) k2 - Deddendum Ratio (d = k2/Pd) N - Number of Teeth Thickness - Disk Thickness I've included two slightly different models. One works when Rd > Rb and the other when Rd < Rb. If the model throws an error with the parameters you've set, then switch to the other model. Rd = N/(2*Pd) - k2/Pd Rb = [N/(2*Pd)]*cos(Phi)
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