How to remove and reinstall a drill press chuck

I have a 30 year old Craftsman drill press that had a keyed chuck I wanted to replace with a keyless chuck. I hammered, and cussed, and hammered some more. Finally, I cut off the outer part of the chuck and heated up the inner part with a torch,,,,just enough to make it expand a little. I put a chisel in my air hammer, and it finally popped off. I cleaned the 33 jacobs taper, reinstalled my new keyless chuck.
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