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Contrarotating mechanism
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Printable contrarotating mechanism (same mechanism as a differential)
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Model information
- Source
- Printables
- Category
- Engineering
- License
- Creative Commons — Attribution — Share Alike

If you added a gear to the body you would create a differential. (I only realised that when my dad told me)
Parts:
- body
- bottom gear
- top gear
- cage x3
- inner shaft
- outer shaft
- pin x3
- side gear x3
The way I designed the parts to be connected is by softening the plastic with a soldering iron (120°C for PLA) and squishing it together. Other methods should work as well.
Assembly:
- attach gears to their respective shafts (top with outer and bottom with inner)


- attach pins to the body

- put side gears on pins

- put bottom gear with inner shaft on one side

- put top gear with outer shaft on inner shaft

- connect cage to its pins

DONE