[GreenKeys] Teletype Model M15 Fiber Gears

Mon, 9 Jun 2003 18:58:17 EDT

I'll have to agree with Dave.  The only practical reason I could come up with 
for making asbestos based phenolic would be for some abrasive purpose.  The 
phenol itself doesn't have any better temperature rating than the linen, canvas 
or paper normally used.  And as best I recall, asbestos has very poor sheer 
and tensil properties.  Of course, if you wanted to sell lots of replacement 
motor gears...  :-)

In a message dated 6/9/2003 5:48:05 PM Central Daylight Time, 
[email protected] writes: 
>   Every Model 15 mainshaft gear I've seen was machined from linen
> phenolic -  they're all brown in color and you can see the grain of the
> linen on the surface of the gear.
>   Have never heard of asbestos being used in any sort of phenolic or
> bakelite.
> 
> 73
> Dave Ross    N7EPI    [email protected]
> 
> 
> 
> [email protected] wrote:
> >
> >Does any one on the list recall the WWII era M15 main shaft fiber gear
> >being
> >called asbestos fiber gear?
> >Thanks
> >[email protected]

Robert & Susan Downs
Houston
<[email protected]>

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