Bill has been working on a beading tool for beading aluminum tubing
for use with rubber hoses and hose clamps in rad plumbing. PL

William Adkins wrote:

Hi Paul,
Disturbing news, that is beside me trying to get this to go thru 3 times.
The beading tool will not work for the following reasons.
Forming the bead to a acceptable height stretches the material to
the point of fracture.
I tried three sizes of bearings (balls). You know the result of the first,
just too small.
Second set was trice as large but still did not force the bead high enough
and showed signs of fracture along the top of the bead.
Figured larger balls might work. Did in fact produce acceptable bead height,
but actually cut thru the material due to stretching beyond the elastic limit.
Plus the bead was very wide.
Two days shot, but at least we know for sure it will not work, at least with that
tubing.
I will return the tubing only if you need to verify my findings.  'Course I have
to get the d---- mandral out of the tube first.

By the way what is the latest on the cheaper seals?  Got a engine coming apart
very soon.

Fly fast, land slow.
Bill

Don't bother to send it back Bill. Perhaps you could find
some tubing that was 0 heat treat state. I am not sure
what the heat treat on that sample of tubing I sent you  was 
but it seemed a bit hard.

Try McMaster Carr for teflon encapsulated silicon O-rings. Good prices.
If you don't have a catalog you need to tell them you have a
company with more than 40 employees or they won't send you one.

Paul Lamar

 
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