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Planetary Gearset 02 — image 1

Planetary Gearset 02

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This is a fidget spinner planetary gearset that I made while experimenting with printing assemblies all at once. The…

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Model information

License
Creative Commons — Attribution

This is a fidget spinner planetary gearset that I made while experimenting with printing assemblies all at once. The resulting print will come out as one piece, but with a small amount of flexing at each gear they will "pop" free and the whole assembly will rotate. With a little spinning back and forth the gears will "wear" in and after that they will roll freely.

It does seem to roll smoother in one direction than the other. If you spin such that the planets rotate with the tip of the V on the herringbone gear engaging first, it seems to self-align better than if you spin it the other way.

Print Settings

Printer Brand:

Prusa

Printer:

i3 MK2.5

Rafts:

No

Supports:

No

Resolution:

.010

Infill:

100%

Filament: Filamentum Exrafill PLA Melon Yellow


Notes:

Printing with reduced infill doesn't appreciably lower printing time, but does make the part significantly weaker.

How I Designed This ===================

Designed in Solidworks 2018, using built-in ISO straight gear profiles. Once the teeth and pitch diameters were worked out, I used the "Flex" tool to twist each gear to give it the angled gear teeth, then mirrored the body to create the herringbone.

LibreOffice Calc was used to work out the number of teeth, pitch diameter, and twist angles.

Category: Mechanical Toys

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