I bought (used) a Jacobs 6A Chuck, 33 Taper, 0-1/2” capacity that appears to be in great shape. But it has a straight arbor on it, which I want to replace with a Morse #2 taper arbor so I can use it in a lathe tailstock.
I opened the jaws all the way, put a steel drift over the center of the inner arbor end, and tapped, then banged on the drift with a hammer. The chuck was over an opening sufficient to let the arbor drop out, but it wouldn’t budge.
I mounted the chuck in my little 2-ton hydraulic press and pressed on the arbor end till I couldn’t push the lever any more. The arbor held fast.
I put some oil around both ends of the arbor where it goes into the chuck, and am awaiting whatever lubricating or penetrating process that might happen.
Am I going about this removal right? I haven’t seen any pictures of the chuck that would lead me to believe the arbor is threaded in or anything. I don’t see a screw head, like the chuck in my electric drill has. Should I just get a bigger hammer and hit it harder? The chuck has been well-cared-for, I don’t want to wreck it.
TIA for any advice.