Torque Wrenches

[desmo888 at comcast.net]

Alan,
I thought the same thing. But all of our torque wrench manuals in our test lab at work state that you can NOT use an extension on the torque wrench handle.
I really do not understand why but we have several brands and they all state the same thing.

Dave Kase
Engineering Manager
PDQ Manufacturing 
'90 CQ
> Untrue, the style of torque wrench, where you dial in a torque and it clicks
> once that point is reached, will always click at the same torque,
> independent of lever length.
>  -----Original Message-----
> From: 	Al Powell [mailto:apowell at gocougs.wsu.edu] 
> Sent:	02 December 2003 15:29
> To:	Q-List
> Subject:	Torque Wrenches
> 
> I think a detail that some of are missing (although it has actually been
> stated in other terms) is that a torque wrench is calibrated for the length
> of the wrench as manufactured.  Whether you have an 18" wrench or a 24"
> wrench, they both read correctly for THAT specific wrench.  If you add a
> pipe on the end of a torque wrench, you defeat its calibration and render
> its scale useless because it is no longer applying force from a point at the
> designed distance.  (Aside from that, you'll probably damage the wrench if
> you apply excessive force to it by extending the handle.)
> 
> Each wrench is designed to read correctly as manufactured, regardless of its

> length - that's just part of the manufacturing process and assumptions.  So
> adding extensions to a torque wrench is self-defeating because it
> automatically makes it inaccurate.
> 
> ************************************
> Al Powell
> apowell at gocougs.wsu.edu
> 1958 Fiat 1200 Transformabile Spyder
> 1983 Datsun 280ZX Turbo
> 1993 Audi 90Q
> 1997 Chebby Blazer
> 1999 Chebby Blazer
> ************************************
> 
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