Reciprocating ball reducer

Converts rotation into reciprocating (linear back & forth) motion.

Functioning parameterized design, so you can make it as big as you want.

I designed this as a motion study, and to see how well this would work on a 3d-printer. It works surprisingly well.

It's currently designed to be hand-operated, but easily modifiable to be motor-driven. Motor-driving it is on my short-list.

In the hand-driven configuration, it needs to be held together by hand as you turn it to get the correct