If you look at Bewbies while tightening the lug nuts the amount of torque will be increased. Trust me, I know what i am talking about.

 

Used as a lever extension, the material flexibility affects torque readings because when the lever flexes, the lever arm is shortened.

 

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This is the answer.

 

lol zing!

 

no. force changes with the length of the perpendicular arm. 100lbm of force on a 1' moment arm will yeild the same torque as 1 lbm of force on a 100' moment arm.

changing the length of the torque wrench will in no way affect the torque reading. ever. it will require less force to acheive the proper torque. thats it.

the wrench will click at the proper torque every time. its a moment, not a force measurement.

 

Which arm do you think is the lever arm it only applies to changes in the business end of the torque wrench

 

right, but im saying that the torque does not change. if i set my torque wrench to 80ftlbs. used it to tighten something, then put a 4ft extension on it. it would simply require less effort from me to reach 80ftlbs. 80#s is 80#s is 80#s.

you said the torque changes, it does not. the force does. they are not interchangeable.

 

right, using an extension bar would simply enable you to use less force to reach the desired torque.

to echo what most people have been saying, extending the length of the torque wrenchs lever arm will -not- affect the actual torque being put on the bolt.

 

Okay guys i appreciate all the comments lol. Some of you are confused by what extension i mean. The extension that im using attaches to the torque wrench (it DOES NOT make the torque wrench longer, it goes perpendicular to the torque wrench) then the socket goes on the other end of the extension.

It looks like this :

http://www.canadiantire.ca/AST/brows....jsp?locale=en

 

if you set the torque wrench to click at 100lbs of torque, it will still click at 100lbs of torque, regardless of extension length. the torquing force has nowhere to go besides the length of the extension to the bolt. as long as the extensions aren't so long that they are starting to twist off the perpendicular axis, all the force you are putting in on one end will get to the other.

 

Makes sense. LIke some of you said... if i put an extension on the handle of the torque wrench then it will be inaccurate lol. Thanks !!!

 

.. it won't be inaccurate!

 

Ugh. Brain fart. A wrench extension won't affect torque readings either as a socket extension or force multiplying extension. I amend my posts prior that torque readings will only be affected in only the theoretical and impractical scenario of extending the lever arm on the socket side. Sorry.

 

alzor: I know i know i was saying extending the LEVER will make it inaccurate not using the extension.

dynamho: Dont be lol. I get it now. Only if you put an extension that will make the torque wrench longer will make the reading inacurate. Putting a socket extension will not.


Thanks everyone

Close thread

 

NO! As others have said using an extension on either end will not effect the amount of torque applied. By making the torque wrench longer it only makes it easier for you to apply the same amount of torque. If you set it for 80ft-lbs it will click at 80ft-lbs regardless of any extensions used!

 

why is this still going on???

NO EXTENSION WILL AFFECT THE ACCURACY OF THE TORQUE WRENCH IN ANY WAY

period.

/thread

 

It will not change the amount of torque that is applied before it clicks!

You can extend the HANDLE of the torque wrench by 100 feet and the extensions from the head by 50 ft if you so desire so long as the handle lever and extension are perpendicular to each other (90 deg) the torque setting won't be affected.

The -ONLY- way to foul up the torque reading is actually -extending- the torque wrench at the head in a manner OTHER then the axis it was intended to go, which is 90 degree relative to the handle. SUCH AS THIS:

or this

 

Agreed, this is the point I was trying to state earlier, laziness set it.

 

hahaha. if you decide to use a torque wrench like that then you dont belong any where near a car. yes that would affect it. but only the reading at the bolt. itd still click when you were torquing the handle of the wrench at however many footpounds. but since its on a different axis of rotation than the bolt, the final reading at the bolt would be unknown

 

there's a formula for it but alas let's let this thread die.

 

Yup. That's the theoretical and impractical scenario I was trying to mention, but you said it way more clearly.

 

honestly can't believe why this is still a discussion.... some people need to stop pretending they are engineers

 

ok, pigs can fly and cows can jump.

oh wait, extensions affects torque ?

jesus seriously, this stupid "topic" worth 2 pages ?

I rather see "Mazda kill rotary" "Synthetic oil" "oil weight" than this extension bull crap

 

okay people chill out. I got my answer. No need to keep bumping this or ill delete it.

 

I used this awesome app that you can use to calculate the proper torque setting when using extensions. Hope this helps.

https://play.google.com/store/apps/d..._result#?t=W10.