3D-printed Model of the Eccentrically Cycloidal (EC) Drive

The Eccentrically Cycloidal (EC) drive is a very new invention. It is covered by a number of US and international patents, the most recent one issued in 2014. This video and this model were created with the explicit permission of the patent holder.
The model shown here features a very impressive gear ratio of 1:9. A traditional involute gear pair with the same gear ratio would require the wheel to be almost 3 times larger!
For more information on EC gears, please go to www.ec-gearing.com.
To download the .stl files for this and other models, and to donate, please visit www.otvinta.com.

[@Timestamp_Guy]

It's a helical gear, just with 1 tooth.

[@Gottenhimfella]

Does this drive back, or will it hold a load without needing a shaft brake?

[@anavi8r]

In our 3D-printed model, only the pinion can be used as the driver, it won't work the other way around. But I believe in a metal model, it works both ways.

[@Gottenhimfella]

thanks very much, that makes sense.

[@wesleymays1931]

This is like a worm drive, but it isn't, because the 2 shafts aren't at right angles