Subject: Wiggins couplings.
From: Paul
Date: 7/19/2000, 12:57 PM


I was driving out to bug the guy making our intake manifold flanges
and I had this idea for reducing the cost of the wiggins couplings.
I don't have a price yet but I think this might be cheaper
than machining a split clamp out of aluminum bar stock on an NC lathe.

It will be cut out with the hydro jet process.
You could also make your own with aircraft snips.

It will be up to you to bend it up, form it and bolt it around
the sleeve with three 6-32 SS screws and lock nuts.
This part will hold the whole works together.
No hose clamps will be necessary so it will be a bit lighter
and probably more reliable.

Paul Lamar


Jeff Spitzer wrote:

I bet that notch really needs a .015 rad and not .15.  Is the plan to bend
down all the little tabs?  Is this strong enough to hold the joint together
when pressurized? (Remember that this clamp must keep the pipes from
separating axially)

Jeff Spitzer



Thanks for catching that Jeff. Was a typo on my part when
I scaled the detail.

Yes on bending the tabs.

Well the pipe area is about 1.3 square inches so at 50 PSI the
the load is 65 pounds. Shear stress on .032 five inches long is
about 400 psi. Yes I think the aluminum can handle that.
The bending load is indeterminate :-) We considered .025 inch thick
SS but it is harder to hydro jet.

BTW don't forget to hang 65 pounds off your hoses, hose
barbs and worm clamps :-)

Paul Lamar
 
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