On Sun, 25 Apr 2004 22:01:31 -0300, "Ken Heaton"
wrote:

Comments below:

"Brian Whatcott" wrote in message
.. .
On Sun, 25 Apr 2004 04:09:07 -0700, "Evan Gatehouse"
wrote:


"Brian Whatcott" wrote in message
.. .


I found this test interesting. I was surprized how well the swaged
cable performed. About as well as the best swageless.
And swages cost about 50 cents each.
These days, I take a chinese wire cutter ($15) and grind a swaging
profile in the jaws, so the extended cost at these prices is
one off $16 unit $16
ten off $25 unit $2.50
100 off $115 unit $1.15

I would very much like to know small quantity prices on all the
swageless terminals on the market - amny offers?

Brian Whatcott Altus OK
p.s. This hand swager is capable of applying excessive deformations -
easily, so a reasonable swaging jaw profile is required.

I think you might be confusing a Nicropress type sleeve (that is applied
with a lever type hand squeezer) with a swaged terminal that uses very
expensive hydraulic roller presses that squeeze the swage terminal. I've
seen Nicropress sleeves for about what you mention, but swage fittings
run
about $15 for a 1/4" for example.


I looked over the test description again, more carefully this time.
The description mentioned a
"C. Sherman Johnson Co. swaged terminal, with the swaged wire assembly
professionally made."

and also mentioned that in all cases, the other end was secured with
two nicopress swaged ferrules and a bolted clamp back up.

In no case, was damage to the nicopress end noted, so I have to
conclude that the double Nicopress fixing was superior to both
roller-swaged, and swageless terminals, and remarkably cheaper.

Is this reasonable, in your view?

Brian Whatcott Altus OK

No, not reasonable. I'm not great at explaining things but I'll try. The
double nicopress fittings could support the load imposed in the tests only
because they were clamping an eye that was passed around a 3" dia. pipe.
Some of the load on the wire was passed to each nicopress fitting but most
was carried by the friction inherent in the eye passing around the 3" pipe.
Think of a rope around a bollard tied back to itself.

Hmmm....you feel that the upper wire end was essentially locked to a
pipe by friction.

And so, I presume, you feel that the pipe was prevented from
rotating, because if your explanation is correct, there would be a
turning couple on the pipe.

Actually, light aircraft use double Nicopress swages, but a preferred
setup is to leave a slight loop before the second swage, in order to
observe the onset of slipping failure in the first Nicopress.
Others paint a mark at a joint.

I know it doesn't sit well with people who feel they need to pay ??$80
a fitting, but Nicopress are strong and reliable enough to be used in
a more demanding role than sailboat rigging. My opinion, naturally.

Brian W