Absolutely. The circumferential expansion far exceeds the tiny inward radial
expansion.
Thomas W Noel
KF7RSF
> On Dec 9, 2016, at 6:23 PM, charlie@thegallos.com wrote:
>
> <anip>
>> I don't agree. If the hole is large enough to just clear at -40C, when
>> heated the entire mass will increase in volume. The OD will get larger
>> and
>> the hole will get smaller and become tighter against the mast.
>>
>>
>> 73 de
>> Gene Smar AD3F
>>
>>
> I guess your science teacher "Back when" didn't do what mine did. He had
> a steel ball (on a handle, and a steel ring (ditto). At room temp, the
> ball would NOT fit through the ring - maybe 1/32 of interference. You
> then took the ring, put it in a bunsen burner, and hot it hot (didn't even
> need to be red) - the ball fit though perfectly
>
> Yep, the way materials expand the hole gets bigger. We do it in the shop
> ALL the time, heat a gear etc to make the hole bigger to drop over a shaft
>
>
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