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Torque settings and extensions

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amcboy said:
Bob, now that is valuable advice!

Ever compare types of TQ wrenches?

Scaaary sometimes.

Advice: Get yours checked/calibrated!

Just my .02
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I have found that over nearly two decades, Snap-On TQ series torque wrenches are either dead on, or completely screwed up. Usually the screwed up ones were misused in a BIG way. When I retired I kept two TQ units and completely trust them.
 
Bob Buxbaum said:
Frankly, given the allowable tolerances of a torque wrenches, one should be more concerned with the quality and accuracy of the torque tool you own than a minuscule error that could be created by an extension.
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Bob Buxbaum said:
.... An extension WILL absorb power from an impact tool, but not a torque wrench. ....
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The extension doesn’t know what it’s connected too. It absorbs power either way. It doesn’t affect the torque you apply with a torque wrench because you compensate for it.

When using a tongue wrench you deflect it until you reach the desired force. The flexing of the extension makes you deflect the whole thing a little farther. But since you’re concentrating on getting a certain reading and not on deflecting it some specific angle you don’t care or notice that you had to move a bit farther.

The impact tool is applying a certain amount of energy. Dissipating the same energy over a larger deflection angle reduces the amount of force created.


PC.
 
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