Torque wrenches, adapter, socket extensions-Read 1st post BEFORE Voting please!!

The longer the length, the greater the torsional stress in the actual extension. The applied torque will be delivered though.

 

In my opinion I think there is more torque or a sort of added leverage. I've learned this through removing lugs. Without an extension and one hand holding the wrench level, it seems to be more difficult to loosen the lugs.

 

I remember hearing that it did back in shop class in High School. Always try to adjust slightly where appropriate. I also have heard that using anti-sieze on threads can tweak the actual torque applied to the fastener to the high side--something like 20%(?) higher.

 

Crow's foot on a torque wrench, maybe.
If the CF is applied at 90 degrees to the handle, then no impact. If it is applied to inline with the handle, then it does impact it.

Socket extension? No impact at all.


Now here's a good one....
You have a 3ft breaker bar and it's not doing the job.
The guy you are working with tells you to tie a 3ft rope to the end of the breaker bar and it'll double your torque. Is he full of shit?

 

I didn't read the rest of the posts but here goes. Newtons third law. For every action there is an equal and opposite reaction. If that bolt is exerting an opposing force that causes 90 ft-lb of torque on that extension and it twists a quarter of a turn, the extension still is going to exert 90 ft-lb of torque on the head of the torque wrench.

 

I say no. regardless of the extension torque will still be distribute through out until the extension give (snaps). all the mechanism in side the torque wrench is what sets the lbs. not the handle. you can torque close to the head (will require more effort) it will still give the same amount as if you torque from the handle. im just talking out of my ass atm lol.

 

The extension flexes and stores energy, just like a snatch strap, that's why it's easier to remove the lugs. You get a little movement to work with so you can get some inertia going when you push against the wrench. As long as you're not bouncing on the torque wrench to tighten (lol) it shouldn't affect the accuracy of your torque reading.

 

20% higher, 50% higher, 100% higher, all possible depending on the lubricant used, and how many times you do it...

 

Yes

 

Always!

First you're afraid of spiders like a little girl. Second, if you could guarantee it was a direct 90º with zero wiggle then I'd say yes. But with the wiggle it can throw off your arc. I can't explain it properly, but the idea is sound. Third you keep forgetting the apostrophe in "you're". Fourth you think raptorobamaathiestjesusonguncontrolforabortions is rad.

 

There have been lengthy debates regarding the use of neverseize on lug nuts. Personally, I don't use any on the threads but I also don't believe that it would have any impact on a torqued connection. Look at any high strength bolt application, they all have heavily oiled threads and the reason is, you don't want friction between the bolt threads and the nut. When you torque a bolt, you're applying a tension to the bolt. That tension that you've built up in the bolt sandwiches the 2 pieces together so they can't move. Say if you have a rusty bolt and a rusty nut, you could hit the applied torque value just with thread friction, long before anything is even remotely tight and that is what you want to avoid. That being said, I do not believe neverseize will impact a torque rating.

The cheater bar multiplies the force you are able to exert on the bolt but the torque setting on the wrench is unchanged. It'll still click where it's supposed to (assuming the cheater bar is actually made to fit the wrench). If the cheater bar is too big, you could end up causing other issues.

Edit: fucker, I just realized you said a rope, not a cheater bar... ya got me

 

This is true.

 

Yes.

 

A shaft will always transmit all the torque applied to it, until it reaches its torsional limit and fails.

 

That's what she said.

 

IIRC in the april 2011 magazine of popular mechanics the proper usage of a torque wrench was explained by article writer Mike Allen. The writer said that it was okay to use an extension with a hand torque wrench as long as you are applying smooth consistent amounts of torque the extension would twist to a degree but still torque set amount of ft/lbs.
The following month of May 2011 there was a complaint from a reader that using extension of any size would throw off the ft/lbs. The writer responded with an amazing physics pictograph (not sure if using right word) of how the extension will twist, but if you torque at 70 ft/lbs the extension will twist while still torque at 70ft/lbs.
On my own test of 2 click type torque wrench and 1 bending beam, i have not seen any under-torqued lugnuts on my family's 7 cars. I mean as long as you apply consistent and smooth pressure on the torque wrench i dont see how the extension is going to absorb enough torque to make your lugnuts loose.

 

No it doesn't change the torque. I have been turning wrenches almost 25yrs and have had this argument with many techs. I proved to them it does not by using an extension to torque a head bolt then no extension on the same bolt to prove the torque is the same. The applied force of twisting is the same at the bolt. That does not change.