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Helical-Elliptical Gears

So what's so interesting about a gear made out of wood? Take a closeer look: it's elliptical!

Woodworker and artist Steven Garrison made helical (and helical-elliptical) gears using conventional woodworking techniques. Though such gears probably have no real world purpose, they are cool to look at in action: http://www.stevengarrison.com/id5.html (with embedded YouTube clips - don't miss the second one from the top) - Thanks Rob!

Also check out Steven's helix forms that fit together.


That style of gear is actually useful for very specific applications where the speed needs to vary up and down in a regular cycle. Of course, they aren't usually made of wood!
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Yeah, I guess they do sortof look like a reese's peanut butter cup :) Almost got my screen covered with chili when I read that!

I know that there are certain types of presses that use elliptical gears like Jonathan mentioned, but those are straight-cut rather than helical. I made these just to show that it can be done. I'm glad you guys like them. Please don't try to eat it LOL!

Steve Garrison
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