Transfering power to a pulley attached to a rod

[lewis198]

A picture speaks a thousand words.

In this video, at 41 seconds:



Eugene R transfers power to a pulley attached to a rod but only the pulley spins. I am in
the process of fabricating a pulley system like this. My question is: How is this done?

 

[UltrafastPED]

The working rod is inside of a bushing which provides the required mechanical alignment.
The pulley will be welded or mechanically fixed to the inner, spinning rod.