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16T oval gear for Spirograph by 3Domas — image 1
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16T oval gear for Spirograph by 3Domas

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Oval gear for large spirograph ring

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This is a 16 tooth Oval gear for the Spirograph frame by 3Domas... and should fit the variants. It was a bit challenging to add an oval to a ring with such large teeth, but I got it to move smoothly without snagging and it does pretty well. Looking at my desk.. this was version 4 as I had to do some unique adjustments to most of the teeth.

Oval's in a round ring will give you flats before turns and adds larger swings as your center goes closer and further from the edge no matter what position you pick.

I really like this spirograph frame set. It is easy to handle and its a great gift. I recently started printing a layer of TPU on the bottom to reduce slipping which makes it even better.

Get the snap-ring and numbered gears here. https://www.thingiverse.com/thing:4853283
...and of course the frame ring assembly and round original gears can be found  https://www.thingiverse.com/thing:905849

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