In article ,
Roger Mills wrote:
Yes, but OP has got a *keyless* chuck!

He says the new one is - but is the old one? ;-)

The nearest equivalent would be to clamp the short end of an Allen key
in the chuck, and then to give the long end a sharp tap with a hammer
(as has already been suggested by others earlier in the thread).

--
*It was all so different before everything changed.

Dave Plowman London SW 12
RIP Acorn