Free 3D-printable models designed by Zheng3
Pocket Gears

Be fancy and geeky all at once.

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Permit me to present a stylish way to introduce the concept of gear ratios. For every turn the big gear takes, the little one turns twice.

These gears are designed so that one can snap-fit a single .25? neodymium magnet into their centers. They also permit the wearer to casually throw around the word “neodymium” at parties.

If, as I am, you are a belt-and-suspenders sort of hominin, you might affix the magnets in place permanently with a dab of super glue to prevent the accidental necrotizing of the intestines of pets and small children.

A second magnet on the opposite side of one’s vestments will hold the gears in place.

I recommend using these magnets and the Space Age adhesive of your choice.

Will not damage clothing and may actually enhance self-esteem.

Also available on Shapeways should you want something a little fancier than plastic.