I agree that this may be a tempest in a teacup.
!5,000 pounds seems like a lot. But even one of these bolts is more than
capable of holding 15,000 pounds with little elongation. I do not know the
exact modulus of elasticity, however. I just remember that one lab in the
engineering department at my college had a machine to measure several MILLION
pounds of tensile properties of metals. It was originally built during WWII
,as I remember, and literally they never made them like that again. I saw this
used to pull metal bars to fracture, and it took a major amount of tension to
budge them, well more than 15,000 lbs.
I never took those engineering courses, but I ended up TUTORING the engineering
4 bolts tightened reasonably tight will, in my nitwit opinion, be more than
capable of handling the kinds of loads these hydraulic systems are creating.
I wonder if we can use data published for other applications, apply come
conservative estimates, and get some reasonable specs for the rebuild of these
-------------- Original message --------------
From: "Nolan" <firstname.lastname@example.org>
> Porsche, Wilwood and a number of other manufacturers have standard in their
> caliper rebuild kits the o-rings you need to replace when you split the
> caliper, which their rebuild procedures call for. Girling was the one that
> was weird about it, and no-one seems to know why.
> These are steel bolts in a steel, iron or sometimes aluminum calipers. The
> stresses are pretty mild, and the materials quite standard. It's not rocket
> science and it isn't critical for torque values. Getting hung up in ramping
> angles and fatigue factors really is a waste of time here.
> ----- Original Message -----
> Subject: Re: Brake Caliper Conspiracy
> > So there DOES seem to be something special about these calipers regarding
> lack of availability of parts and information. "Conspiracy"?
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