I received a request to reproduce a Manhattan fan cage using a sample. When I opened the box, I was met with a real problem.
The center piece was a stamped ring
instead of a solid ring. I don't have a punch press and tooling to make these, so If I couldn't figure out a way to fab this up, I would have to return the cage and not accept this project. Searching around my toolbox, I found a huge tube socket for the sprocket nut on one of my bikes. It was the right size.
I rounded the end of it on my belt sander and radiused the inside with my moto tool.
Taking some sheet brass, I measured it up and cut it to size.
Using hammer and dolly method, I folded the edges around the tube socket, stopping to frequently anneal the brass so it wouldn't crack and split.
At this point I used my drill press to push the center through inside the tube socket.
Now I had something that would work.
Success. I saved the project. The rest is just like any other cage, with rings and spokes.
Cheers,
Bill