The hole you see in the top pick is the in feed. The shaft comes out the other end compressed and burnished at whatever diameter you make it. Mine’s 23/64. It takes a few broken shafts to get it adjusted, but once it’s there, you can make a shaft in about a minute.
The way it works: You chuck your square stock in your drill(or in the socket extension, then chuck that in the drill), insert the stock into the infeed, rotate the stock with the drill, and push it by the router bit. the combination of the drill and the router makes the square round. If you set the router to cut a tiny bit larger than your out feed, the end product will be compressed and burnished.
One note – to compress shafting, it needs to be a fairly soft wood such as POC or dug fir, etc. You can’t compress hardwoods this way.
