morse cone removal

[olderdan]

All previous advice is relevant and should be considered.
The picture I posted was of a precision keyless chuck in my case an ALBRECHT but other brands will be the same fitting.
If you do see a screw at the bottom the chuck will likely be from a reversing power tool, the screw will be a left hand thread and is there to prevent the chuck from UNSCREWING from the arbor, the head of this screw will almost certainly need drilling off, my tip is to use a piece of tube in the chuck to protect the jaws and the drill bit while doing so. I have never seen a chuck of this type fitted to a No 3 Morse taper arbor but with second hand machinery anything is possible. On that note I have seen arbors that have been bent as they are case hardened only.