Subscribe to Make Magazine Today!
greg harper planetary unicycle hub.JPG

Wrapping up my trifecta of epicyclic gear posts today (1, 2) is this practical application from Greg Harper, a resident engineer at the University of Washington’s Center for Experimental Nuclear Physics and Astrophysics, who put together a custom epicyclic gear train for his unicycle hub. Designed for speed, the hub gives 1.5 rotations of the wheel for each rotation of the pedals.

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and My work has also appeared in ReadyMade, c’t – Magazin für Computertechnik, and The Wall Street Journal.

blog comments powered by Disqus

Related Supplies at Maker Shed


Get every new post delivered to your Inbox.

Join 28,792 other followers