How To Use a Torque Wrench
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- Опубликовано: 17 сен 2024
- How to use a torque wrench
• How To Use a Torque Wr...
www.norbar.com/
This video from Norbar Torque Tools, the world's torque specialists, takes you through the best practice use of a Norbar Torque Wrench.
The most common wrench is called a click wrench. It will indicate by a mechanical mechanism when a pre-set torque has been reached. The pre-set value can be set by the user, or by a Quality Control Department. The second most common torque wrench is used to check an already tightened bolt.
It can have a mechanical or electronic sensing mechanism and can display by means of an electronic or analogue display. There are other tools referred to as "torque wrenches". These are powered by pressurised oil or air and are known as hydraulic or pneumatic torque wrenches. The use of these devices is more complex and will be covered in a later article.
Most torque wrenches are used for tightening nuts and bolts accurately although there are also some other uses. These other uses will be discussed in another article. There are two main reasons why we use a torque wrench.
One reason is to achieve the correct level of tightness. The bolt needs to be stretched to create a clamping force on the assembly. If the torque value is too low, the assembly will not be secure. If the torque is too high, the bolt may break. The torque wrench allows the operator to tighten the bolt as the designer intended.
The other reason to use a torque wrench is to be consistent on every bolt in the assembly. Used properly the torque wrench will ensure that all bolts have the same torque applied.
The effect of badly tightened bolts can be seen in lost time, money and lives. A machine stops working and takes weeks to repair. A bridge collapses. A wheel comes free from a truck and hits a car travelling in the other direction. Good quality torque wrenches do save time, money and lives.
The largest part of the uncertainty comes from the operator. Problems will arise if the torque value cannot be set correctly. Unfortunately many wrenches have a scale that is difficult to read, or becomes worn away with use. It can also be difficult to position the cursor accurately. Some wrenches have a vernier scale to help. These will only work with one set of units. Be sure whether the vernier is designed for the N.m, kgf.m or lbf.ft scale.
The operator will also affect the torque by using the wrench too fast. The "click" wrench is designed to give a physical signal when the desired torque is reached. If the wrench is operated too quickly, the torque will go too high before the operator can stop.
With dial or electronic indicating wrenches, the operator must be able to see the dial or display. This can be difficult in applications where there is poor light or limited access. Finally the operator must apply a smooth and slow force at 90 degrees to the wrench. Side loads can alter the torque applied and may cause the wrench to slip off the bolt.
There are many different styles and qualities of torque wrench available. With the correct selection, operation and maintenance, a torque wrench can save you time and money. To make the correct decisions you may need to seek the advice of specialist torque tool provider like Norbar Torque Tools.
Further information on the use of Norbar's products can be obtained from our website, from the literature supplied with them and by contacting Norbar or our distributors.
![How To Use a Torque Wrench and How They Work [INSIDE LOOK]](http://i.ytimg.com/vi/lVvcVq30xc4/mqdefault.jpg)
![How To Use a Torque Wrench and How They Work [INSIDE LOOK]](/img/tr.png)
I totally agree with Mtechthewise! Remember to wind down torque setting after use to ensure the internal spring back to resting stage in order to preserve torque accuracy! Hope this helps...
the advantage you get your bolts tightened to specification, so as to not break the bolts or parts they are holding together... Veryy important for many applications!
Used one of your new type 300 professional torque wrenches today. The scale is clearer than the older model but the plastic adjuster is seems flimsy compared to the previous metal knob and tough plastic . I don't think you can call it professional as it wont last like the older model, not keen on the electronic strain gauge models either as they had trouble reducing past 17 nm to the bottom range of 10 nm in my experience. Nobody seemed to remember to charge them at work so were often annoyingly flat when needed and so everyone used the older mechanical types as we had in the tool cupboard!
Thanks for contacting Norbar. A change of socket size will not effect the torque accuracy. This is because the distance is measured from the rotational axis and this will remain constant no matter what size of socket is used on the fastening. A more detailed explanation can be found at the norbar website>products>catalogues and handbooks>Intro>General torque wrench info
I tried posting a link but RUclips does not like it for some reason
Thank you very much for the very clear and helpful instructions.
A BIG like for the vid.
God Bless.
Although considered by some to be good practice, extensive testing has clearly shown that unwinding a Norbar torque wrench to its minimum setting hence relaxing the spring between uses has no effect upon the wrench calibration over time.
As you say, and as the video demonstrates, one click is required. Furthr clicks result in over torquing.
The object of a threaded fastener is to clamp parts together with a tension greater than the external forces tending to seperate them. If the initial tension is too low,varying loads act on the bolt and it will quickly fail. If the initial tension is too high, the tightening process may cause bolt failure. Reliability therefore depends upon correct inintial tension. The most practical way of ensuring this is by specifying and controlling the tightening torque.
Shouldn't leave the box on the table. Put it to the drawer or on the shelf.
A torque wrench will fit any socket that can connnect to it using the square drive. Torque wrenches have different square drives. For example the smallest torque value Norbar torque wrenches have a 1/4 inch square drive, moving through 3/8 inch square drive all the way to a 1/2 inch square drive for the largest Norbar torque wrenches.
Thanks for the vid -- it's quite instructive.
A socket extension will affect the torque applied to the fastener as torque is lost through the twisting of the extension. The longer the extension the more it twists, hence less torque is delivered at the fastener as some of the torque is consumed by the twisting of the extension.
hi from n.z,
there is a different torque value if oil is applied to thread of fastener etc ( different values apply to differing lubricants ie; grease, graphite, soap, wax, locking compounds and sealants, lite or heavy oil etc)
A socket extension will not affect the torque wrench as it will not alter the length of the wrench. If a wrench extension is being considered the folllowing formula will calculate the effect of a Torque Wrench Exension: M2 = M1 x L2/L1 where L1 is the normal length, L2 is the extended length, M1 is the set torque and M2 the actual torque applied to the fastener.
A click means that you have applied the torque that has been set on the wrench to the fastener. There is always a chance that the operator will hit the 'dead stop' after the torque wrench has clicked and there is a further chance that this can apply more torque to the fastener. An impact wrench is a tool that will tighten a fastener but it is not controlled in terms of torque and does not operate in the same fashion as a torque wrench.
@criscros7
PPS: I've found a quite comprehensive list with the tightening torques required by car manufacturers for most of their models. I'd eyeball that for 85 to 90% of all cars a torque greater than 100 Nm is required. SUVs and Vans require anything between 130 and 180 Nm. The majority of cars require 110 or 120 Nm.
@criscros7
PS: A little RUclips research taught me that in the US, wheel bolts are commonly tightened with 80 ft-lbf which equals 108 Nm.
i would also use an impact socket.. there is 70-80 ft lb of pressure and you don't want to crack your sockets.
....ensuring comfortable stance
You don't need a torque wrench for a job like that, a wheel attached to a wall isn't going anywhere.
If you look up, you'll see the joke flying over your head!
It's a demonstration video wtf
@@CaligoMilites knob head he was joking ffs some people
Great question - my wrench didn't come with instructions. I thought it functioned as do other 'torque-controlled' devices, which is to just keep clicking as you turn and to no longer tighten the bolt when desired torque was reached, but NO, it will keep tightening without any more clicks unless you stop and reverse direction momentarily. Listen for that FIRST CLICK, then STOP.
Also, I was told the torque control does NOT work in reverse, i.e. counterclockwise. But never use it to loosen bolts.
@macman216 The springs in this model are made of adamantium taken from Wolverine's claws, so they don't deform like those in normal torque wrenches if you don't release the tension before storing.
@AgoraMutual Always set back to zero or negative side because inside the wrench is a spring.
Do not forget to unlock and put the torque wrench back to low resistance before putting it away for some time.
nice one. you forgot to mention you should return it to a lower torque when done?
I AGREE and why do some people insist at having a second click
Although considered by some to be good practice, extensive testing has clearly shown that unwinding a Norbar torque wrench to its minimum setting hence relaxing the spring between uses has no effect upon the wrench calibration over time.
A 100 N.m torque wrench will cover the vast majority of cars and bikes. The precise setting will vary depending on the make of vehicle. so check your handbook or with the manufacturer. Trucks and buses will be considerably more than this.
Great video thanks
Sir tourqe range 1600nm tite karane ke bad kya mai 1300nm par marunga to jo tite hone ke bad sound aata hai vah 1300nm par aayega kya plz
you should really pay more attention to the end of the video, as he turns the handle before setting the wrench back in the box, appropriately storing the tool according to the instruction manual.
hi Norbar: May I have your permission to download and use video for educational purposes? Tks
In total agreement with that fact that you should window the wrench after use. Why put undue stress on the spring, plus it is good practice, you don't know when it will be used again. I have yet to see an aviation or rail course that tells you otherwise
The question as to whether or not a Torque Wrench requires winding down after use is a frequently debated subject. Norbar's stance on the subject is best explained in the following blog: www.norbar.com/News-Events/Blog/entryid/428/Default
I'd like to know how to remove the direction adjuster (lever) to change the direction on/off. I've seen mechanics have it removed so the wrench is not damaged, but they never say how they do it.
Hi Paul. Thank you for the question. Please may we ask you to confirm which product you refer to in your message above? We look forward to hearing back from you.
@hom2fu My Matco tool dealer including the Snap On dealer down the road said to lower down to the lowest setting when not in use.Ruin the clicker mechanism when set back to zero.
why did you not show the need to wind down the torque setting before storing the wrench?
They will sell more springs at calibration time ?
where can I get that torque wrench exactly?
Shucks, should have listened to professor Mansell and purchased these a long time ago.
wont using an extension give an inaccurate reading?
Any recommendations for maintenance and storing away e.g. set to lowest Nm or just above it, oil for long storage period or when in frequent use?
webcoder.eu Store at lowest setting (if you have 20-120 Nm, then store at 20 Nm). Do not store lower than lowest setting, there should be always some pressure.
When I see this type of torque value: 13-16 ft-lbs torque; I dont quite understand what it means--Does it mean find the in between or is that lubed/dry? I've been online for hours and still havent found the right answer~
@TruTorque
Really? Here in Germany, wheel bolts are usually supposed to be tightened with 110 (steel) or 120 Nm (alu rims); for vans and the like, the required torque is often significantly higher (depending on make and model). I've recently asked a mechanic in a BMW garage; he said that they always fasten wheel bolts with 120 Nm.
titanium bolts on super-cars have a lower torque!
@coshyno what is the correct torque for a 2007 toyota highlander wheel nut
Seems like a nice thing to have.
@macman216 That way when you get it out it is ready to use on the same job again NOT!! You are right they forgot to trun it back to the lowest setting. Norbar nice video, great tools, but bad example.
Check the calibration certificate:
Just look at it, yep... checked.
Were can you buy a good torque wrench
bit of voice input would of been nice
I agree! Plus, the title of this video is somewhat misleading, should be titled with "Norbar" torque wrench.
What about torquing in 90 degrees angle?????
Do I need to go in slow motion in order for it to work?
A comedian
thatl come in handy when i need 2 change my oil
what size was that torque wrench ?
nice.
Maybe someone can help me. I just used a TW for the first time for a lawn mower spark plug. It got that initial click but then I still felt tension on the wrench so I turned it again and the spark plug moved a little until it clicked again. Was I a moron for repeating this 5 times? My thinking was that once the wrench reached the desired torque, it simply wouldn't turn the plug anymore. I did it all wrong, didn't I?
Yes.
It look like Wurth ...
Whats with the music?
I see. That explains why my wheels fell off then...
@throttlehard Because it manufactured oversea, therefore, they unable to speak English. When they speak, you might not able to understand what they are saying and that will cause more confusion.
lol.you're just telling us to read the manual
++
This video was made by the manufacturer and yet, not capable of making a narrated video for better understanding?
This is CHEAP! I could make a better video than this and not have to worry about getting paid to do it.
HowmuchCost
nice