It’s an intriguing replacement for the ubiquitous CV joint—but is it practical?

Two cycloidal disks are driven by a planetary gear reduction for an even greater ... and an absurd monster truck/front loader wheel — also printed — to provide traction in the grass and ...

The clock uses an idler wheel to move the hour ring so it doesn’t need a separate hour hand. After he built his first design, [wyojustin] realized he could add a planetary gear that could move ...