Time for rotor work. I used the cold saw to cut a 2" piece of my 1020 low carbon steel stock. Mark gave me these cool lathe spider things that fit around the chuck teeth and provide a stand off from the chuck face (I didn't have enough stock to cut longer pieces).
After facing, I used a big boring bar to remove about 3/8" of from the inner diameter:
...and I found out how steel wool is made:
1 of 2 arm-fulls. For perspective, that's a full size trashcan....a lot of it.
After that, I simply flipped the piece around and cut off the extra.
It really wasn't that easy (took me about 7 hours to do all 4), mostly because it's steel and I had to do a ton of tool passes (because I ordered stock that was too small ID...oops).
Next: Mill work, aka putting 80 holes in these for screws/alignment pins.