Doggonnit David,
I tried to let this die with no acrimony. Perhaps you should too.
Noone mentioned finger-tightening bolts other than you.
All the scientific studies that I've found state that if the bolt
isn't tightened to yield (stretched too much), there's no danger in
reusing it.
Give it a rest.
Regards.
CR
DLancer7676@cs.com wrote:
>
> In a message dated 10/18/2000 9:51:00 PM Eastern Daylight Time,
> ccrobins@ktc.com writes:
>
> << If the stress is below yield there will be no loss of strength of the
> bolt. In fact on the second application the preload may well be higher
> because generally the friction lowers slightly on subsequent
> applications resulting in a higher preload for a given torque. >>
>
> Yes, if you finger tighten the nut it would be well below "yield" and I would
> expect no loss of strength. But this "opinion" is in direct conflict with
> the research presented by the Bowman engineers. Looks like a Chevy vs. Ford
> thing to me. Fact is the loss of what the presenter called "preload" was
> demonstrated at the seminar--this kind of negates the "opinions" as far as I
> am concerned as does the information I posted earlier from the Bowman
> technical publication. At any rate, I am gonna feel a lot better spending
> the few cents it takes to replace critical fasteners when I disassemble.
> Charley can keep his old stretched ones, and we both will be happy, I am
> sure. My last post on the issue. 8^)
>
> --David C.
>
> "Do illiterate people get the full effect of alphabet soup?"
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