1/24 Harmonic Gear Reduction Fidget
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I wanted to learn about Harmonic drives so I made this model :)
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Model information
- Source
- Printables
- Category
- Mechanical Parts
- License
- Creative Commons — Public Domain
I saw a Harmonic Drive mentioned in a video and got curious about them. I decided to make this one to learn a little bit about them. It is quite large, but I think that makes it a little easier to understand how it works if you don't already. The two internal gears align the two outer gears' teeth which creates rotation on one of the outer rings. You can also squish one of the outer rings, twist it to skip the teeth and then you get a motion that spins the entire outer ring while maintaining the gear reduction.
Materials:
- Long M4 Screws (35mm)
- 14mm OD, 4-6mm ID Bearings
Assembly Instructions:
1. Place the two Outer Rings on top of the Bottom Brace
2. Place a bearing inside of each side of the two Inner Gears
3. Place the two internal gears inside of the Outer Rings and slide a screw through each of the two Inner Gears and screw it into the Bottom Brace (noted by yellow highlights)
4. (Optional) You can snap on the Drill Adapter to the Bottom Brace to quickly spin it with a drill
