In order to restore my Rockwell Horizontal Milling Machine I will need to get a motor mount, motor, pulley and another v-belt.
Here is what I can find out about the v-belt.
The Mill manual shows this as: Cat. #49-084.
Fortunately there are two belts on this machine and they are both the same. I already have one of them.
Unfortunately the belt I have has no manufacturer markings on it, so I cannot learn much from it. It also looks like I need to remove the jack shaft pulley in order to remove and measure the belt. The belt looks very narrow.
Googling the part number pulls up a NATO Stock Number of 3030-01-218-6698.
This in turn maps to a Gates 7M730, or a Delta International 49-084.
This tells me it is a Gates 7mm PolyFlex belt. 9/32″ wide (looks right), ribbed back, 730mm long.
I wish I could find this belt on the Gates website (the parts search function is not working this afternoon). The best I can find so far is this Product Application Notes pdf.
It appears this is also a Bando 7M730 belt.
The Gates belt appears to be widely available on Amazon, eBay and other sites.