Im missing a bit of the picture i think.
Best i can work out (yeah thats right i have not pulled one apart) the Greenfield blade disc is welded to the shaft, spindle shaft and disc are one part.
So i would suggest attempting to drive the shaft down out of the bearing carrier. Could be fraught with danger as theres alloy bits and age and moisture, it could get nasty.
Id soak it in CRC or WD40 for a few days while i thought about how i was going to do it.
