Teflon thingees

[Delwin D Fandrich]

JIMRPT@AOL.COM wrote:

> Et al;
>  Here is what Dupont has to say about teflon, of course it is their product
> and this was found on a specs page advertising multiple uses of Teflon.
>
> ADVANTAGES OF TEFLON®: Excellent electrical properties, Heat resistance,
> TEFLON® is capable of continuous service at 500"F, Toughness and flexibility,
> Chemical inertness, Low coefficient of friction, *Zero moisture absorption,*
> Weather resistance, TEFLON® is completely unaffected by outdoor weathering.
>
> Jim Bryant (FL)

  -----------------------------------------

Et al;

This question comes up because the early (small) Teflon bushings did seem to
react to variations in humidity.  That this came about because the Teflon was
squeezed tight and/or allowed to loosen by the wood surrounding it -- it is not a
100% rigid material -- has been largely ignored.  It's more fun to blame the
Teflon.

That 99.9% of the clicking problems and the high friction problems that developed
with the later (larger and much improved) bushings were the result of poor pin
fitting is also ignored.  Fitted correctly these bushings worked exceptionally
well for very long periods of time.  And when they did rarely cause problems they
were very easy and predictable to repair.  If the correct procedures were
followed.  But, when you have both the factory representatives and the bulk of
the teaching technicians demonstrating incorrect servicing procedures on the poor
things, the chances of that work being done correctly decreased to virtually nil.

End of second rant for the day...

Regards,

Del