My head is starting to hurt!
JVV
>
> From: "Michael Marr" <mmarr@notwires.com>
> Date: 2005/12/30 Fri AM 08:39:47 EST
> To: "Nolan" <foxtrapper@ispwest.com>, "Guy D. Huggins"
> <guy@genfiniti.com>,
> "TR Mailing List" <triumphs@autox.team.net>
> Subject: Re: Brake Caliper Conspiracy
>
> > Torque values are for the nuts and bolts, not the pieces holding them
> > together. It's simply a matter of determining the size and grade of the
> > bolt(s), and then looking up the torque values for them.
> >
> Whoa! I have to disagree with you on this one, Nolan. It's not that
> simple. The tightening torque for a threaded fastener is only one, very
> imprecise, way of measuring the clamping force of the fastener combination
> (bolt/nut, nut/stud, bolt/internal threaded hole in component etc.). As
> Randall pointed out, it is a somewhat imprecise measurement. In theory,
> because of the "inclined plane" nature of the thread, the more force you
> exert in the direction of the minor angle of the plane, the greater the
> force exerted normal to the surface of the plane (= clamping force). The
> force you exert on the bolt or nut by pulling on the wrench is multiplied by
> the moment arm of the wrench you are using. Thus, a 45 lb pull on a 1 ft
> wrench = 45 ft-lbs. If you are applying this torque to a 1/2 inch bolt,
>...................
>
> Michael Marr
> 1960 TR3A
> Naperville, IL
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