Elliptic Gear

by enhydra, published

Elliptic Gear by enhydra Mar 5, 2013
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2733Views 1061Downloads Found in Mechanical Toys


This is #35 from "Five Hundred and Seven Mechanical Movements" by Henry T. Brown.


Creating proper elliptic gears is quite sophisticated. I did something like a workaround: I created two gears, sliced and merged them into one. It works fine, but I would not build it into a real gearbox because of the poor efficiency.

You will need a screw M6 by 10mm for fixing the small Gear.
If you scale down

  • to 66%: a M4 by 6mm should work
  • to 50%: a M3 by 5mm.

And finally you need a rubber band for the Wedge and Base.

Preview in SketchFab:

SketchUp model:

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