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MMD > Archives > January 2003 > 2003.01.09 > 07Prev  Next


Exhauster Cloth vs. Pneumatic Cloth For Air Motor
By Eric Shoemaker

Hi Group!  Philip Jamison raised a good question about material used
for covering air motors.  Of course, it depends on what kind of motor,
but I've experienced some similar dilemmas: use "motor cloth" and
subject it to very hard creasing to give more flexibility, or use
"pneumatic cloth."  Either way, hard creasing will lessen the life of
the "motor cloth", but using "pneumatic cloth" on larger bellows will
wear faster.

But again, what air motor is it for?  If it is an Aeolian (tall or
short) motor it should work just fine with "medium/motor cloth", but
if it is a Bush & Lane ten-point double hinged pneumatic motor you
_must_ use a thinner cloth.  (Some Pratt-Reed air motors are like this
as well.)

Fellow MMDer Dean Randall used Bilon on a Standard motor some many
years ago but dusted the interior of each unit to eliminate the "thwack
thwick" sound of that material to tend to want to stick to itself.
That is one way to get around a tricky problem, but suppliers sell
material that is usually classified as "thin, medium, heavy and extra
heavy."

If only someone could market a cloth between thin and medium that
accepts hot hide glue I'd be placing my order immediately.  Who cares
what color it is!  :)

Eric J. Shoemaker
Tacoma, WA


(Message sent Fri 10 Jan 2003, 00:19:51 GMT, from time zone GMT-0500.)

Key Words in Subject:  Air, Cloth, Exhauster, Motor, Pneumatic, vs

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