My Dad's Dixon 427 lawn mower has been getting very noisy, so I checked the mower deck spindles and found that the center spindle was very loose. After taking it apart, it's apparent that this problem was going on for a few seasons.
Original worn-out spindle shaft, which is supposed to be .750" the full length
I used the lathe to remove the weld and then pressed off the blade hub.
Turning the shoulder for the blade hub on the new shaft
The completed new spindle shaft
Final assembly, ready to go back in the mower deck