Ok, got it mostly apart. Looks like each rotor has 2 ball bearings at the snout end. Underneath those bearings is a sleeve bearing. This sleeve bearing may be the graphite bearing everyone talks about, but it doesnt seem like it's made of graphite. It seems like it's steel so it may be a regular sleeve.
The male rotor has the larger bearing and it's a NTN 1832A. The female rotor is smaller and is NTN 3215a. Those numbers are for the top bearing. I believe the bearings underneath those have the same number minus the A. I'll have to check tommorow.
The bearings seem to be unsealed caged roller bearings. They are oil bathed at the snout end which also lubes the helical gears.The portion underneath the 'sleeve' bearing on the rotors also has a chamber which receives oil. There doesnt seem to be any seal to prevent oil from flowing from the bearings onto the rotors... or perhaps mine are completely washed away? I did notice the lower oiling chamber was full of crud and it took me a whole can of carb cleaner to wash out all the sludge.
My brother noticed smoking one winter when he decided to use that Mobil 10,000 mile oil. I think he ended up putting like 15,000 miles on that oil before we changed it out.
Unfortunately, when I drove out the outer bearing, it popped the inner race, cage, and balls out, but left the outer race in the housing. It's in there. it aint coming out. I'm probably gonna have to cut them. This isnt that big of a deal since I'm going to press new ones in.
My male rotor has one of the corners cracked off at the intake end. It's not bent or anything and it still spins smooth... but looking at that, I might need a replacement piece. So again, i call out for any cheap superchargers that one could sell me for the cause.
Pics tomorrow... or soon.