[captainclock1988]

Unless the part that broke is not shown in the picture it looks like Pot Metal to me. If so you might be able to use J-B Weld (regular, NOT Kwik) to get it back together.

As far as belts this guy has what you need:

https://www.qualityradiobelts.com/order-here.html

I have used flat belt material that you super glue together that works pretty well, but I can remember if I got it from Mark Oppat or Alan Jespesperson.

Hi Eliot, the part I'm referring to was a plastic sleeve that went over the area circled in the picture, so no the part is not in the picture, it was a piece of knurled plastic that went over the area circled in the picture, but it broke when I was trying to put a belt onto it.
Also the flywheel on this thing is cast aluminum not pot metal.

The picture posted below is the part that was on the area circled in the picture, as you can see it broke into several pieces, it looks like some sort of plastic material, like bakelite or something like that.