Re: Torque wrench question
[Re: JoesMopar]
#973357
04/14/11 10:30 PM
04/14/11 10:30 PM
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Joined: Apr 2008
Posts: 301 California
court9155
enthusiast
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enthusiast
Joined: Apr 2008
Posts: 301
California
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Ive heard it does so I avoid using an extension if I can.
I guess one way to tell is to torque something with an extension then remove the extension and check the torque setting to see.
67 charger
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Re: Torque wrench question
[Re: court9155]
#973358
04/14/11 10:32 PM
04/14/11 10:32 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Ive heard it does so I avoid using an extension if I can.
I guess one way to tell is to torque something with an extension then remove the extension and check the torque setting to see.
It definetly affects it.
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Re: Torque wrench question
[Re: RodStRace]
#973364
04/15/11 08:02 AM
04/15/11 08:02 AM
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Joined: Jan 2003
Posts: 21,065 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,065
Niles , Ohio
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Ive tried a few times checking torque with and with out an extension.Never really saw a difference.Ive done a bunch of heads in car and never had a problem using an extension.My 440 and my kids 413 were done a few years ago.No problems at all.I do use a good torque wrench.Mine is a SnapOn.Rocky
Chrysler Firepower
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Re: Torque wrench question
[Re: court9155]
#973365
04/15/11 08:24 AM
04/15/11 08:24 AM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Ive heard it does so I avoid using an extension if I can.
I guess one way to tell is to torque something with an extension then remove the extension and check the torque setting to see.
shouldn't change it a meaningful amount...it may a skoash if the extension is long enough, because you'll potentially be absorbing some of the torque with angular deflection (twist) in the extension....but that will be minimal with even a 1' 1/2" drive extension...
removing the extension and checking would be more inaccurate, as there is a breakaway torque to overcome the static friction and then the dynamic torque from the dynamic friction as you're rotating the head. using a torque wrench, you're measuring dynamic torque. the static torque required to break it away will always be higher than the dynamic torque, so checking it after you've stopped rotating the bolt head tells you nothing...
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Torque wrench question
[Re: Lee446]
#973366
04/15/11 08:33 AM
04/15/11 08:33 AM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
AN extension on the handle affects torque, that is what the referred article is about. Using a socket extension would also affect torque as it acts like a torsion bar and twists under strain which would absorb some of the imparted torque before the bolt head receives it. I doubt that it is much, but somewhere there is undoubtably a formula to figure it out. I use the shortest extension possible, using a black, hardened impact type extension. Better yet, if you can use a deepwell impact socket by itself with no extension and I just add a couple of pounds to compensate. You probably have more error in your Torque wrench than you will lose to the extension.
torsion bars spring rates are determined by the material's modulus of elasticity, free length, and diameter. All steels have the same elastic modulus. the harder steels just have a higher yield point. the shorter the free length and the larger the diameter, the higher the spring rate.
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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