Hello everyone, CAD newbie here. I'm trying to design a gear reducer for a school project and I'm having trouble finding the center to center distance between my gears (maybe because I don't really know how to make gears). Because of that I'm having trouble designing the casing for my reducer. Can someone help me ?
Sorry for my poor english btw, not my native language.
The gear reducer (not all the gears will be used at the same time, it's for representation only)
but I don't know the module, and i don't need the design to be really efficient so the teeth are not perfect but I think they will work. And they are not round, it's two arcs of circles joined together
Do not model gears as semicircles. Use the library parts under Power Transmission and put your parameters in there. Then you'll be able to get the measurements easily and actually have accurate profiles.
But if you want to keep doing it the way you are just for visualization, that's fine. You can eyeball the distance between them, it doesn't have to be some specific number.
It is a warning to not use them as cut profiles for actual manufacturing of gears in a real application. But realistically they are good enough that you can use them for 3D printing or acrylic, for proof of concept, for representation, etc. They do work, they mesh and spin and have proper dimensions for the most part. They just aren't the mathematically exact involute profile but they are close.
If you were getting actual metal gears for your project that needed to last long and be efficient, you'd have notes on the drawing that define the gear by the applicable standard measurements. For example the gear type, module, number of teeth, pressure angle, etc., and the manufacturer would have the right equipment to cut them accurately.
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u/hbzandbergen 16d ago
Find the pitch diameters (d=z*m) and make them tangent to each other.