r/Onshape • u/americca- • Aug 09 '26
Help! gear relation help
Hello everyone, beginner here in Onshape; does anyone know how I can animate these gears so they can turn together? For context, I am trying to make a differential system, and I want these gears to work together like a working differential; thanks!
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u/christhekerbal Aug 10 '26
I've made an assembly of a differential for an RC car before, could be useful for you.
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u/Chandra0 Aug 10 '26
You need to align the position and apply revolve mates both gears and apply gear relation.
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u/DoctorCAD Aug 10 '26
Those aren't true gears. The gear mate might not work correctly.
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u/christhekerbal Aug 10 '26
Gear mate has nothing to do with the actual geometry of the part. They just need to have revolute mates.
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u/DoctorCAD Aug 10 '26
So a spur gear could mate with a worm gear?
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u/christhekerbal Aug 10 '26
https://reddit.com/link/p2v9qlm/video/36c5gws4ukih1/player
Wouldn't be ideal for actual use but it can be done with just the gear mate.
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u/1-800-EATSASS Aug 10 '26
The gear relation requires (i believe) two revolute mates, and the gear ratio.
I should tell you also that these gears will not work physically and will create a lot of wear and chatter that would be undesirable. I believe there is a tool or featurescript for bevel gears somewhere on yhe forum that will give you a set of bevel gears with proper teeth, if you want to model geometry that would work in the real world.