15-01-17, 02:27 PM
(15-01-17, 01:03 AM)unfazed link Wrote: Heating it would expand it and make it smaller internally. :lolheating would still make the hole bigger
thats why you heat a tight lid on a jar to loosen it - the whole lid increases in diameter not just the outside.
i used to work in a railway workshop where we fitted steel wheels to axles by heating the wheel