Torque Wrenches - my answer... (holy smokes!)

[rob hod]

  Well this has had one hell of a build up, viewpoints have become
entrenched yet incredibly diverse.

  Any chance of a live video feed of the great experiment?, Well worth
cracking a beer over and selecting favorite armchair.
  What are the predictions? Will the experiment be tested with or without
loctite? Is betting allowed?

  Personally I'm glad I got that 5 foot torque wrench and at the end of all
this I may even know what torque to set it to....

  Go huw...

rob

Message: 9
Date: Tue, 02 Dec 2003 16:53:17 -0500
From: Huw Powell <audi at humanspeakers.com>
Subject: Re: Torque Wrenches - my answer... (holy smokes!)
Cc: quattro at audifans.com
Message-ID: <3FCD09CD.9090202 at humanspeakers.com>
Content-Type: text/plain; charset=us-ascii; format=flowed

Don't worry, my undying curiosity should get the better of me fairly
soon.  Thanks for pointing out that a substitute for the 2079 in the
puzzle is readily obtained in my toolbox.  Results will be reported
either way, of course. (unless I forget to do it because something,
anything, else comes up...)

I take it that you have previously performed this experiment, by the way...

> Come on guys!  This has gotten out of hand. The Audi torque wrench is 42
> inches long, the 2079 tool is 12 inches long, the torque setting is 258
> ft-lbs, the resultant torque at the bolt is 332 ft-lbs. The math is simple
> and explained in a previous post.
>
> Prove it to yourself. All you really have to do is this.
>
> Get a bolt and nut and put the nut in your bench vise, tighten the bolt to
> say 20 ft-lbs with your torque wrench.
>
> Now get an open end wrench. Put the open end on your bolt and the closed
end
> on the end of your torque wrench (pre-selecting the bolt head size to
match
> your square drive torque wrench would be useful).
>
> Now set the torque wrench to 20 ft-lbs and apply it. Did the bolt rotate
> some more? I'll bet it did. Remove the open end wrench, go back to the
bolt
> and find the torque at which the wrench clicks. It will be larger than 20
> ft-lbs. In fact it will be larger by this ratio:
>
> Total length of the combined open end wrench and the torque wrench divided
> by the length of the torque wrench.
>
> BTW, the angle that you connect the extension and the torque wrench does
> matter. You can try it with the same setup and you'll find that you have
to
> apply the cosine of the angle between the tools.

--
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/



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End of quattro Digest, Vol 2, Issue 25
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