>Whilst I can see how the device works it occurrs to me that
>increasing the distance of the torque measuring device from the bolt
>centre will affect the actual torque applied to the bolt head.
>Surely there has to be an adjustment in the setting to compensate
>for this.
>
>Unless I am much mistaken, the longer the adapter arm, the less
>force will be needed to make the torque wrench click (you know what
>I mean). If the torque wrench is set to the reccommended setting,
>the likelyhood is that the bolt will be over tightened or even
>possibly stripped.
>
>PS: I have said bolts when I mean nuts.
>
>Perhaps someone can point out the error of my thinking.
Carl - we had a similar discussion in September 2006, during which I
had exactly the same visualisation problem as you, until ....
>Consider (as they say in all the best textbooks) a virtual lever
>going diagonally from the handle end of the torque wrench to the
>centre of the prop bolt. This will be longer than the actual torque
>wrench, but the component of force effective at right angles to its
>axis will be smaller than the force exerted by the operator, in the
>exact proportion required to apply the required torque to the prop
>bolt.
>
>All I had to do was remember that the torque-wrench & spanner
>assembly is a rigid body (at least until the torque wrench clicks)
>and sketch the components of the operator force. Sorry to be so slow
>on the uptake
Does that help?
regards
Rowland
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| Rowland Carson http://home.clara.net/rowil/
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