Tim Wescott fired this volley in
:

Any suggestions about how the key may be retained in there, and how to
get it out without damaging the shaft?



It's a _key_. By definition, it sticks out above the shaft o.d.

Get a sharp,thin prick punch, and engage one end of the key (as high as
you can get, and still get good 'meat', angle the punch down as far as
you can from that point toward the shaft, and give it a smart whack with
a small, hard hammer. That should lift one end of the key, if only a
little.

Another alternative is to give it a mild whack down INTO the keyway, or
milder sideways, and try to break whatever sealant they've put in there.

Keys aways come out, and usually with no damage to the keyway... only the
key itself; cheap, replacable.
LLoyd