[TR] torque wrench question

[wbeech]

Length of the handle has nothing to do with it, it is all about the offset
between the center of the bolt and the head of the wrench.  The wrench will
measure the same torque whether I choke up 6" or use a cheater bar (yes, I
do to get that 105ftlb).
Your results may vary,
Bill B

-----Original Message-----
From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of TERRY
SMITH
Sent: Saturday, August 11, 2018 7:56 AM
To: Sujit Roy <triumphstag at gmail.com>; Randall <tr3driver at ca.rr.com>;
triumphs at autox.team.net
Subject: Re: [TR] torque wrench question

LOL!  I'm just glad you science guys are out there!

> On August 11, 2018 at 5:51 AM Randall <tr3driver at ca.rr.com> wrote:
> 
> 
> > Uhm, that would be why English majors subscribe to this list....
> > 
> 
> Perhaps an example would help?
> 
> Let's say you want to torque your nut to 50 ftlb, your torque wrench 
> measures 26" overall and your crowfoot extension is 4" overall.
> 
> First we need the effective length of the torque wrench.  On mine, the 
> business end is about 1" diameter, while the hand grip extends about 2"
> beyond the center of my hand.  So we subtract half of the head 
> diameter
> (0.5") and the 2" for the hand grip to get 23.5" effective length.
> 
> Now the effective length of the torque wrench plus crowfoot extension.
> Assuming both ends of the crowfoot are around 1" diameter, it would 
> extend the center by about 3", or 26.5" overall.
> 
> Divide those two numbers to get the ratio.  23.5/26.5 = .89 (rounded 
> to 2
> digits)
> 
> Multiply the desired torque by the ratio. 50 * .89 = 44.5 ftlb.  Round 
> that to two digits, and set your wrench to 45 ftlb.
> 
> Hmm, well, perhaps not.  Reminds me of an old David Crosby line: "You 
> see just below the surface of the mud, there's more mud here."
> 
> -- Randall
>

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