Nord-Lock Wedge-Locking Washers - Junker Vibration Test

[@TheCh4s3]

Imagine if all adverts were this informative and engaging. Congratulations Nord Lock, next time I go and buy washers I’ll be going to a supplier that stocks these - me and I presume most of the others who watched this ad.

[@heikki8409]

They used to be.

[@mikebrierley9032]

Can honestly say this was the best pop up add I've seen in a long while. I'm not not huge purchaser of washers as a general rule but nonetheless this little ad/film has been really well put together & is a fascinating insight to what must be a huge problem for industry. Who would have thunk it, that an advert about washers could be so engaging, I'm glad I didn't just hit the skip button, Nord washers rock, or don't move at all more to the point ! ;-)

[@olenilsen4660]

Thunk? Did you mean thought? Sorry, not trying to be mean, I just read your comment and had to look again and see if I`d thunk wrong.

[@galaxiedance3135]

I worked in a factory where these were used. AMAZING ! there was a bolt, maybe 1" that had one of these and it was held on so strong that even the hydraulic wrench could not loosen it. The Millwright had to torch off the head of the bolt to release it. He said that people tighten this too much and these washers are so good that you don't quite have to go so much or you'll literally never get it off. They work the best! I saw it with my own eyes!! You'll never want any other product.

[@666clement666]

Very good washers ! I have been working with them for years on big turbochargers installed on maritime engines. They have never failed !

[@olenilsen4660]

Love that you can approve! I´ve known about these for some time, but never got around to it. Do you feel they are worth the price everywhere?

[@0326Hambone]

VERY impressive! I also like how the video erred on the side of education, opposed to publicity.

[@andrewl9180]

Selling to engineers...

[@KrishanGopal-hg8cf]

Andrew L

[@rva485]

Nick

[@nathanwest2304]

true you can't simply advertise to engineers with promises, they need cold hard facts

[@NadeemKhan-cg9mo]

@@KrishanGopal-hg8cf c ,c " DC

[@zabzabatour7799]

Thank you. This video saves considerable time in arguments with other engineers.

[@cartilige]

Just seen this video as an advert in another video, and it was captivating. I chose to sit and watch the advert rather than the video it was on. I've been using Nord-Lock washers for several years now, knowing that they are superior but never had an explanation of the physics that makes them so. Thank you Nord-Lock for this highly educational advertisement.

[@spurcrawler249]

I’ve been lied to my entire life. This is amazing!

[@ambiey5018]

Who ever made this video is top notch.

[@shavedape777]

This is nuts!

[@-Meatwad]

no this is Patrick!

[@johnosaurus7400]

Ha...

[@stertheder]

+shavedape777 You sure hit the nail on the head with that comment! :P

[@alwaysFlOoReD]

+shavedape777 No...no, this is washers.

[@seanjohnson386]

No. This is 'washers'.

[@andreasr6632]

Best way to secure a bolt available. I had to file one down to fit it in my crankset’s crankshaft but at least now i know it will never come loose no matter how hard i ride my bike. Campagnolo could have just make a counter threaded bolt to secure the damn connecting bolt to begin with, but Italians just can’t make things simple, they expend all their brains making it beautiful.

[@c0mputer]

Well I'm sold. I'm welding every nut.

[@cr0sh]

A small spot weld, between the nut and the bolt thread, would probably be very secure, but getting that nut back off again would be a pain (you'd probably have to cut the end of the bolt off, then use a breaker bar and socket, or an impact driver, to reverse the nut past the damage). An untested option would be to take a cold chisel and distort the threads next to the properly torqued nut. It likely wouldn't back off as much under vibration, but if you had to remove it, the nut could reform the threads (of course, you'd want to pitch the bolt and nut afterward).

[@alphaomega8373]

lol

[@ironsaint]

Welds can break.

[@flinch622]

It's all a risk vs. time consideration. If your needs are short term, no problem. Weld nut to bolt, and at some point fretting is going to cause loss of clamping force - you won't know about it, because the weld prevents checking torque [common maintenance]. Next thing you know, holes are going egg shaped and the next step is broken bolts. I bet they wish they had this style washer around for the Hueys used back in the day - those helicopters used to drop something almost every time they landed/took off.

[@NadeemKhan-cg9mo]

@@cr0sh c hc ,c c v z" c ,f cc c ","" c v c c " f c c SCC c c c v c c c c v,c" c ,c",",",," c c f CSX c x c c

[@YusufSheth]

Great exploration of the topic.

[@powsinwosin6808]

The music is so intense , gotta keep those nuts safe, man I'm not even involved in any engineering stuff or even have a hard time driving a simple nail to a wood

[@justandy333]

This was very surprising, At my work we use Nylon insert nuts all the time and its quite worrying to see just how bad they performed on the test. Very tempted to look into using Nord lock. Ultimately it comes down to cost. I just checked a site we use to buy our fasteners from. When buying lots of 1000 A standard m12 washer is £0.13. and a m12 nylock is £0.31. So a total of £0.44. Compared to Nord lock, coming in a £1.84. So 4 times the cost it would seem. I think for critical appilcations this is well worth it.

[@Mtaalas]

If skimping on few pennies is more important and productive than making sure things never fail.... I don't really see this mindset myself. :/

[@livingaboard]

I think this video shows the possibility of loosening but it was tested at a certain frequency and amplitude in order to get the nuts to vibrate to loosen. Many applications may never experience the frequency and amplitide necessary to loosen any of the methods tested. I build commercial aircraft and we don't have issues with nuts loosening up when they are properly torqued using lock washers, lock nuts etc. Also flight critical items will be lock wired which is often seen on hydraulic and engine components. I have also never experienced any nuts or bolts loosening up on any of my vehicles after driving decades and hundreds of thousands of miles. Again, my vehicle isn't experiencing the test vibration frequency or amplitude shown here.

[@fredfred4086]

You obviously haven't driven over thousands of kilometres of gravel/dirt roads with corrugations on them.

[@angelobreda-pelet]

really a perfect locking washer! congratulations!

[@NoNonsenseKnowHow]

Excellent product! Wish I knew about these years ago.

[@_itis8809]

really? my bike from 1995 has these - originally...

[@0MoTheG]

The principle is based on the washers biting into their surrounding without relative movement during the fastening process.

[@thermionicemission6355]

Oh shit, that's really clever! Simple yet great.

[@jerrywang8613]

Very impressive idea and great infomative video

[@BiggestNano]

I'm not sure how I ended up here but I think this makes me smart.

[@januzi2]

Getting smarter every day, eh? ;)

[@Backtrap1943]

it only makes you smart if you apply it from now on to all ur nuts. Bust a nut!

[@awautoworks4426]

I currently have exhaust nuts backing out of my downpipe to turbo application. I've been fighting this for months. I'm going to pick up some of these nord washers and further reply back to this comment, thanks.

[@mckenziekeith7434]

Any updates?

[@awautoworks4426]

@@mckenziekeith7434 used Nord lock washers, and titanium bolts, still backed out. Sold the car

[@mckenziekeith7434]

@@awautoworks4426 Thanks! I guess nordlock is not the solution to every problem then. Better luck with your new car.

[@awautoworks4426]

@@mckenziekeith7434 hey they did help alot, I had a custom turbo and was working on it weekly, drove me nuts. Picked up a bmw 335i, I appreciate you

[@srcnormal]

Just watched Smeedia talking about using these for his cam gears and had to check it out! Pretty cool!

[@pepecadierno]

Impresionante, no había visto nunca sistema como este para medir los efectos de las vibraciones.

[@TXCHRISZ06]

This was a very eye opening presentation. Im in military aviation and this system looks very useful on smaller parts on our aircraft. Would it be too much to ask to get a junkers test of a lockwired bolt series? I have a community that is interested in the results. Thank you!

[@NordLockGroup]

Thank you for the comment! Will you kindly drop us an email at [e-mail] to explore the possibility of the requested test.

[@2slofouru]

I'm fairly certain it would have no effect if the lockwire had the correct number of twists and correct gauge.

[@Gameboygenius]

The lockwired bolts will do just fine. The "complaint" about lockwired bolts is not that they're unsafe but that they take skill and time to install correctly. With these washers, all you need to do is orient them correctly and then torque them down.

[@rob5631]

@@Gameboygenius bingo

[@moynihanigan]

They did: kzbin.info/www/bejne/fYvRd397j62Vf8ksi=9S8n-fmYtb68x8VR

[@RedOctober2011]

Great idea. I hope they've already made a billion bucks off this, and kept everyone safe in the mean time.

[@albertojosedanielssoncaram6826]

Very good video....absolutely clear explanations!

[@MevaraMevlana]

I like your video explaining some type of washers under vibration...nice to know it

[@arivo9062]

Looking forward to feature this products in our latest innovation

[@GNX157]

These washers would work great in Redmax leaf blower engines, for the cylinder head base bolts, which have a habit of loosening over time. Same for the intake manifold bolts, but they can easily be checked using a white paint marker to watch for movement. I think the cylinder head bolts would need to be slightly longer though to account for the increased stack height, to ensure proper thread engagement.

[@truthseeker8483]

Two nylon insert nuts works well...Great washers! Excellent design!

[@jimgarner1756]

This is a very good video. But I have questions. 1. Were the frequencies, application-torques, and scale readout the same during the tests? (I think they were, BTW.) 2. What are "after the initial settlements"? 3. Why no demo of the increase in effort to loosen the other washers, or at least one? Since it is stated as "proof". I would think any unloosened nut would demonstrate a similar increase as whatever mechanism is used to lock, scrapes through the surface as the bolt loosens away from the friction. 4. Friction is said to be the locking mechanism for most examples of locking nuts. You don't say what method is used in the Nord-Lock in place of friction, (though you do talk about the can of thread and wedge.) You just state that a wedge is created. But you do not pay any attention to the FRICTION of the top and bottom friction portions of this washer. I can come up with a lot of thoughts on how this combo might work better, but the video, while well done, certainly leans away from explanation details; by just stating "it works!" This seems to be sufficient for most but I would really like a little bit more info. I don't want to pull away from the efforts of this video nor the comments that suggest this works better, so I will leave my suspicions here hoping Nord-Lock uses this opportunity to answer those questions. Mostly if friction is not reliable why would you use it to secure the bolthead to the top of the nordlock, and the surface to the bottom of the nordlock? That friction portion is as likely to fail as a star washer, in my mind. I've never used them, but when properly torqued, the loss of a stop nut seems to be very rare, and I am not sure the difference between nord-lock losses and regular lockwashers would make a significant difference to justify the cost difference. Not an engineer. Not a Mechanic. Not well Schooled. But I turn some wrenches. Regardless. Excellent video engagement.

[@NordLockGroup]

Thank you for a very relevant comment on our video. We will do our best to answer your questions. 1. The frequency and the amplitude are the same for all the tests. If you mean the scales on the x- and y-axis, then yes, they are the same for all the tests. All the joints are tightened to the same preload for all the tests. Because the friction coefficients vary between the different solutions, then the tightening torques are not the same. But the tightening torque is only a tool to achieve the correct preload and it is the preload that is the goal. 2. The initial settlements are the settlements that occur directly when the tightening has been done. They usually occur within a couple of minutes. Settlements always occur when two parts are clamped together. The surfaces of the two parts will never be completely smooth, they will have tops and valleys when seen in a microscope. When you clamp these parts together then you will start to flatten the tops until the surface area can carry the preload. This will happen both between the clamped parts and between the male and female threads. When the Junker test starts, then it makes the parts move and that means a bit more of the tops will be grinded down. This will not happen in real life because a bolted joints job is to press the clamped parts together, so they don’t move. The initial settlements are the loss of preload you see in the beginning of the curve in the graphs. When you have settlements then you will also have a loss in preload. 3. Because some of the tests don’t have any preload left, there is nothing to show. In some of the tests, there is a small preload left after the test, but if the untightening test was made it would not show an increase in preload. The untightening graph only shows preload and time. During untightening of the friction locking methods could show an increase in untightening torque because you have to overcome the static friction and that is slightly higher than the dynamic friction. 4. The Nord-Lock washers lock through a wedge locking effect, not friction. The wedge locking effect is generated because of the angle of the cams (big teeth between the two Nord-Lock washers) is bigger than the angle of the thread pitch. During untightening, all rotation occurs between the two Nord-Lock washers. This means that the two washers increase more in thickness than the bolt is moving up out of the hole. This then means that you will get an increase in preload during the first part of the tightening. As you also could see in the film then during the untightening, the top Nord-Lock washer rotated together with the nut and the bottom Nord-Lock washer stood still together with the mating surface (contact surface). This is not due to friction. On the outside of the Nord-Lock washer, we have the serration (small teeth) and they will make impression marks into the nut and the mating surface and they generate a mechanical locking. This is also why the locking of the Nord-Lock washers is not affected by lubrication.

[@johnnewington3798]

I do like Nordlock washers, but designers be mindful and very careful that to achieve the specified clamping force to stop the fixing failing using the Nordlock washers, they may require greater applied torque to be applied, than the standard torque figures for the grade of fixing used. This is due to the significantly greater surface friction when tightening Nordlocks, that opposes the tightening torque, resulting in corresponding less stretch of the fixing when Nordlocks are used. After investigating repeated failures of fixings secured using Nordlock design of ramped washers, which had been tightened to the standard torque figures for the grade of fixing, eventually Nordlock put wording in the specification to this effect, but I considered at the time, this was not emphasised strongly enough, or the risk highlighted in the Nordlock specifications. I subsequently came across designers still specifying standard torque figures when using Nordlock washers, with no regard that they may, likely would require a greater torque applied, to achieve the required clamping force for them to work reliably. Be carful or you specifying Nordlocks washers may be a contributing factor in a fixing failing, if due regard of the increased surface friction of Nordlocks is not taken into consideration in the specification of required torque figure, for any fixing secured using the Nordlock design washer. I hope this makes sense, Nordlock or others feel free to comment, happy to discuss.

[@NordLockGroup]

Thank you for your comment and for using Nord-Lock washers. We appreciate your feedback. You indeed need to consider torque values and clamping force when changing the components of a bolted joint, whether it’s a Nord-Lock washer or another solution. When changing from let’s say a flat washer to a Nord-Lock washer, you will need to apply a higher torque to achieve the same preload. The slight increase in friction is something we account for in our torque guidelines, which are based on thorough testing. You can find our torque guidelines here: www.nord-lock.com/nord-lock/torquelator/ (You need to scroll down a little bit to come to the torque guidelines). To help ensure proper torque application, we have developed a tool called the "Torquelator," specifically designed to assist users in determining the correct torque for their applications. You can find more information about it here: www.nord-lock.com/nord-lock/torquelator/ Thank you again and please feel free to reach out if you have any more questions/feedback.

[@johnnewington3798]

Thank you, I believe this table and torque figures are a relatively new addition to the specification. In principle I support the figures from my previous investigations, but my understanding, this will depend on the hardness of the material that the Nordlock bite against on tightening, which resists the Nordlock washer from turning on tightening. When using Nordlock washers a greater applied torque is lost in overcoming the additional resistance created by the Nordlock design. Anyway, I completed these investigations on the Nordlock design of washer after Nordlock engineers were answering my raised concerns by saying that the Nordlock washers did not require additional applied torque on assembly. Anyway a few Nordlock Engineers will now have lost face,. Although still a very good product, if the extra required torque is stipulated by the design engineer, fully updated into the assembly specifications and fully trained in to the assembly staff. Then the risk that engineers apply this torque in other situations, that are not secured with Nordlock washers and unknowingly damage the bolt or screw by over torque tightening these fixing that have not got the extra friction of a Nordlock washer resisting tightening and stretching the bolt/screw. Kind Regards

[@simsnqta]

​@@johnnewington3798Ey up John. Very useful tips. Thank you! As a pressure vessel design engineer I highly appreciate your comments. Would you like to share some of your investigations? I am curious to have a look.

[@brucewilliams6292]

Very good video. I like the approach to the subject. Thank you so much.

[@robertogifuni7504]

Excellent idea and great video. Congratulations Nord-Lock!

[@OmarEMayer]

Cuando de vibraciones se trata, hay que usar roscas de paso fino. Los ensayos parecen estar hechos sobre roscas de paso grueso. Ante las vibraciones, las roscas de paso fino se aflojan menos. Muy bien los ensayos

[@NordLockGroup]

Las arandelas Nord-Lock aseguran perfectamente las uniones atornilladas tanto en roscas de paso fino como de paso grueso. No dude en contactarnos a [e-mail] si requiere información adicional en este otro asunto.

[@FrequencyOfThought]

I will be finding these fasteners for racing applications

[@tituswilm477]

Partially the locking performance relies on the "softness" of bolt head and part surface. Are there any test results that show the locking performance with 12.9 class bolts used on hardened surfaces i. e. bearing rings with 62 - 65 HRC surface hardness?

[@NordLockGroup]

Our washers are working perfectly together with 12.9 bolts and we have several tests showing that. If you would like to see a test report, please contact your closest Nord-Lock office or [e-mail]. There is a general rule when using Nord-Lock washers which says that mating surfaces need to have lower hardness than the Nord-Lock washers. For steel washers this means a hardness lower than 465HV1. This corresponds approximately to 46-47 HRC. Hardened Bearing rings with 60-65HRC are therefore too hard for a successful use.

[@Ali-v6g9b]

Wow! Thx!

[@scwallac]

Cool video, but the ubiquitous and inexpensive star washer was conspicuously absent from this comparison.

[@adisharr]

+scwallac I suspect that wouldn't work all that well either as there is no tension effect on loosening.

[@NordLockGroup]

+adisharr The bolt securing items we have chosen for this video are the ones we most often found in the market. But we will ensure to include star washers in future testing videos!

[@moninum]

In this video watch?v=_ne19-3vkJg you can see that they are not better than a helical spring washer.

[@JAnx01]

Star washers have no effect on 8.8 bolted connections and above. High preload makes turns them into flat washers.

[@cr0sh]

I think you also need to include threadlock compounds as well (blue and red loctite brand are probably most common); I do appreciate seeing the examples given. I've always wondered how well nylocks worked; it was pretty impressive that they worked as well as they did compared to other examples. I've also known that helical-spring washers weren't that good, but the test showed that they have some effect (ie, better than nothing). I plan to investigate the Nord-Lock washers in the future (maybe with my next order from Fastenal - I doubt I can buy these at my local hardware store).

[@OYeahan]

What was the torque used for the locking nut in double nut solution? I thought the purpose of such solution is to torque the "bottom" nut to the intended preload torque, then mechanically lock it's position against the bolt and apply max torque that the fastener allows to the locking nut. That will probably slightly increase the clamping force but I'm sure there are some computational methods that could be used to accommodate. Is that the method demonstrated? I thought double nut solution is quite effective when used properly. But maybe it is effective against precession (eg. in angular bearing bicycle hubs) and not much for vibration?

[@magnusklahr8190]

It is a great system. Use it alot!👍

[@louisrichards3702]

i noticed they didnt try a all metal grade 8 lock nut,how would that do in a test???? i have used these all metal ones in engines holding rocker arms in place, never had one move..

[@DeadlyDiddly]

Looks like a brilliant solution!

[@uiopuiop3472]

NOW I CAN NOT LOOK AWAY. I NEED THE NEWEST IN WASHERS TECHNOLOGY

[@ahmedmosad7161]

i have seen this in Facebook short and as usual the important information is cut 😂😂 so i m glade that i didn't run and see it full in KZbin ❤❤❤❤ +and i want to know if not the friction so geometry make and additional pressure by tiding the lock like some one pushing the lock nut so keep them not rotating or i get it wrong 😅

[@adisharr]

I've been using Nylock nuts for years and it seems they perform well in many circumstances. Nothing seems to come close to the Nord lock system though.

[@EvertonTobar]

Have you tried Loctite?

[@AdilAaronAkhtar]

@@EvertonTobar Loctite has temperature limitations, even with the high temp variant. at what temperature do you think these would fail haha

[@Gw0wvl]

I've always used a adhesive 'Threadlock' to lock the nut and or bolt in place , While these do look very useful Threadlock is my number one choice when I'm Rebuilding motorbikes .

[@lezbriddon]

I just had a bolt back out and escape that was fitted 16 month before on our van after a clutch replacement. It held a vibration damper/stabilising bar between the van gearbox and chassis, without it the engine and gearbox tried to spin when driving away, this stressed and destroyed a driveshaft, intermediate bearing, gear selector cables and lots of pipework.... as this bolt comes through a bracket with some exposed thread, two hammers have now deformed that bolt so removal will need a grinder.... a pair of these washers would have saved me all that repair expense...

[@ridinginthepnw1357]

Was the nyloc nut used properly in that test? My understanding is that it needs more threading past the nylon to secure properly.

[@joshuabettiol6986]

it only requires 2-3 threads exposed past the nylon insert

[@ridinginthepnw1357]

+Joshua Bettiol thanks

[@Brantel.]

@@joshuabettiol6986 Depends on the shape of the end of the bolt. This one obviosly has some tapper or roundness on the end. This test did not have 2-3 full threads past the insert.

[@glinnyfelicitas7812]

I came here because this problem affected my prototype. I think this could be a great solution to the problem, however i would use a combined method for extra precaution.

[@DavidMihaiChira]

I really like the man who gets off the train at the end

[@matttownsend7119]

An excellent solution where fatigue crack initiation from the small indents impressed into the clamped surface is not a factor.

[@jamesborden8913]

dear sir. I wanna know why does clamp load soared when bolt & Nord lock Washer was un-tightened in junker test. please gently let me know the reason. And can I understand that application of nor lock wedge washer means demanding more forces than tightening torque, when un-tightening situation?

[@texnician]

I would be interested to see an identical video where the bolt is not lubricated.

[@NordLockGroup]

+texnician We'll keep that in mind for future videos. Where are you based? Our sales people make live demos with M8 bolts and we could arrange such a demo if we have sales people close by! Let us know here or through [e-mail] if you are interested in that!

[@JAnx01]

1. The lubrication is used to accelerate the loosening effect. 2. It's not like it is unusual for threads on bolted connections to become greasy while used on machines.

[@drtracernum20]

in my business. Summers Manufacturing Co. we are required to graphite lube ALL bolts. a nut and bolt friction welding themselves is worse than having it loose a little tension over time.

[@jimarcher5255]

Continental and Lycoming requires lubricated nuts and bolts on their cylinder connections.

[@WaffleIronMan91]

Just out of curiosity, how would a distorted thread nut such as a stover nut, or a centerlock nut compare? While they still use friction to secure themselves, they are not dependent on tension between the nut and the surface to provide it.

[@NordLockGroup]

We have not tested stover nut or centerlock nut specifically, so we are unable to comment on the behavior of these items. However, we have tested other metallic prevailing nuts which use friction to secure the joint. They normally start to rotate loose when exposed to vibration. How much of the original clamp force that remains after the test varies depending on the type of prevailing nut.

[@jeffr8282]

@@NordLockGroup I was looking for this exact question to be answered. Nord-Lock washers mar the mating surface but distorted thread fasteners do not.

[@prashantkalasapur8145]

Very good advice for electronics su systems industrial units.

[@pleappleappleap]

Are Nord-Lock washers effective on nuts which are harder than the washers?

[@NordLockGroup]

No, they are not. The Nord-Lock washer has to be the hardest part so they can make the impression marks. Without the impression marks we don't have the wedge locking effect.

[@PaulGreggBYRC]

I'm suspicions, in that the washers dig into the joined materials, creating crack start sites for fatigue cracks.

[@NordLockGroup]

+Paul Gregg The Nord-Lock washer creates impression marks in the underlying material as well as on the bolt/nut. This however, does not initiate crack formation or increase probability of fatigue cracks.

[@PaulGreggBYRC]

+Nord-Lock Group Sharp physical features like those impression marks create potential crack initiation sites. Do you have fatigue test data on bolted joints with and without this type of fastener? Haven't locknuts already solved this problem? www.aircraftfast.com/self-locking-nuts.htm

[@NordLockGroup]

+Paul Gregg We have done a few different fatique tests. We have customers for over 30 years and none of them, as far as we know, have experienced cracks in their component materials. Paul, if you would like to discuss this deeper, please let us know your location and a Nord-Lock representative will contact you. You can contact us at [e-mail]. Thank you!

[@PaulGreggBYRC]

+Nord-Lock Group I don't believe I've ever seen fasteners which put sharp grooves in joined materials used in aerospace applications. I am supposing this type of fastener is used in applications where fatigue stresses are not critical, and weight is not as much of a design factor. There is a lot of documentation of the effects of stress concentrations such as surface indentations: www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=kt+scratches+metal+fatigue+

[@mike_winchester]

Calm down, Paul.

[@anneallison6402]

Do you have M3 you convinced me

[@NordLockGroup]

Hi! Here's a link to our dimension list: www.nord-lock.com/nord-lock/products/washers/dimensions/ Thank you and all the best!

[@MrDhalli6500]

my only question is, why would you use anything else?

[@ian-c.01]

If the system relies on geometry and the angle of the wedge being slightly steeper than the angle of the thread pitch then you'll need a different wedge angle for every thread. That's fine when building up a structure but a PITA when retro fitting to existing bolts.

[@muchachomalo]

+Ian Clarke Not that much of a pita you already have different washers for bolts with different diameters. You just need different washers for each bolt.

[@ian-c.01]

muchachomalo . . . and thread pitch, fine coarse, metric, imperial etc

[@ablasttv]

+Ian Clarke Couldn't you just have one thats steeper than most thread angles and use that same washer for several size bolts?

[@davidb8214]

+Aaron Blankenship yes you could

[@NordLockGroup]

+David B It is not a good idea to use one size of the Nord-Lock washer for various sizes of bolts. The inner diameter of the Nord-Lock washer should only be slightly bigger than the diameter of the bolt. This ensures a good concentric placing of the washer in relation to the bolt and serrations can make impressions evenly on the bolt head. If you use a correct size washer together with a standard bolt, for example NL8 to a M8 bolt, you do not have to think of angles. It is designed to fit.

[@ashfaqjuna]

Surprising then how well wheels on cars are kept in place for years..

[@dougfresh1341]

Also, the washers I got were lightly glued together. And I thought there were instructions to install with writing on top or bottom. Video didn’t clarify. I split them to figure out which way the slant had to go. Obviously us old guys can’t see too well.

[@Krzys_D]

I usually go with nylock, since its much cheaper than nord-lock, but if their is a project that involve people using the product, nord-lock is the way to go.

[@yukon4511]

I'm an aircraft mechanic, and I can't say I remember an instance of fiberlock nut failure. I'm going to say the Junkers test is extreme, and does not reflect real-world conditions. The damage done to the part by the Nord washer would preclude it's use in many applications, certainly aviation.

[@rcarsey]

....meanwhile, my prop is held on by 6 AN6 bolts with no safety wire.. just nords...

[@ozstriker1984]

Also we’d never use a thread this course.

[@dougfresh1341]

I own two Harleys. Nord-lock is gonna profit big time this payday!

[@brunolda2008]

Would it be possible to include castle nut and split pin in future testing videos?

[@NordLockGroup]

Thank you and we will take note of your suggestion.

[@frankdiscussion9988]

Why? Clearly the nut is locked on by the split pin. Maybe you should ask them to include test of a bolt that is welded too? JK..but I don't know why they would test a castle-nut....

[@ohger1]

You would need an infinitely degreed hole (impossible) and a "castle" the exact same size as the pin and bolt hole to prevent the fastener from moving at all. If the nut moves far enough to catch the pin, the torque on the bolt changes. In most situations, the castle and cotter pin would prevent the bolt from loosening much, but not completely which is what this system seems to accomplish.

[@ronb1071]

I fell on agree with you and put a bunch of posts explaining that

[@funkyMRI]

I recently bought a Taurus Chin-up bar, which was delivered with split washers. Just ordered Nord Lock online to replace them. It fascinates me that this video demonstrates the split washer in a different light from many other sources online, for example: Bolt Science. I'm guessing that either the testing procedure is different or that you ran multiple tests for improved accuracy (no standard deviation visible in the graph). I'm also not sure if the baseline is comparable.

[@NordLockGroup]

Thank you for ordering Nord-Lock washers Daniel! We hope you are satisfied! We did see the Junker video from Bolt Science and the result for Helical Spring washer (split washer) is similar in both videos: both videos show that the locking performance is not enough.

[@tomallen100]

A perfect design.

[@NordLockGroup]

Thanks Tom!

[@someusername121]

It's still relying on friction or else the washer would just spin off with the nut. Also missing wave washers and Belleville washers. And internal + external tooth washers.

[@andriyshapovalov8886]

Well, they don't sell those and so no the pitch intended ;)

[@olenaerhardt7725]

Thank you for the very informative film. But how to find torque specifications for those Nord-lock nuts? Can you recommend any link? As far as I understand this is a crucial question on all projects with different nuts.

[@NordLockGroup]

Hi Olena! Here's a link to the torque guidelines on our web page: www.nord-lock.com/nord-lock/torque-guidelines/

[@olenaerhardt7725]

@@NordLockGroup Thank you for the link, I saw it before and thought I misunderstood smth. For the bolts I need M12 it is 99Nm what is 73 Ft-lbs. My confusion about all this increased. Maybe it is on those particular nuts, but let me describe my project in more details, bcs the range on torques I currently have is between 10-50 Ft-lbs, and more likely 10-14 Ft-lbs, bcs 50 someone applied on a truck. So my project is: on 2003 Chevrolet Cavalier I'm replacing Ball Joints. Original ones were on Rivets! I removed the rivets and increased the holes to 1/2" to fit new ball joint bolts. But the question I can't find anywhere: what torque specifications do you apply on those 3 bolt (better to say nylon nuts they have), attaching the new Ball Joint to the Control Arm? In Haynes Manual it says should be an instruction sheet in a new set with Ball Joints, but mine doesn't have that instruction sheet. From Internet it looks like 10-12 or 12-14 Ft-lbs, but in one film he applied 50 Ft-lbs, though on a truck. Someone also wrote me, that he applied 40 Ft-lbs on his Chevy Cavalier (but doesn't remember for sure). I did a lot of research on Internet, nothing on that question. I also noticed that all the Ball Joints sets they sell on Amazon doesn't have those instructions on torque spec., none of my multiple questions to different sellers were answered. So I assume everyone, but me, is just guessing on those torques and that is perfectly fine with everyone but me. Quite interesting indeed.

[@NordLockGroup]

@@olenaerhardt7725 Thanks for your explanation. We have a few questions that we need to understand to be able to help. Please get in touch with us at [e-mail] Have a nice day!

[@olenaerhardt7725]

@@NordLockGroup Thank you for the attention to my problem and e-mail. I have already intense correspondence with one of your ladies, she is trying to help me. I just want to remark that any films you make about applications of Nord-lock nuts with wedge type washers will be very helpful for promoting this new product. Can it be applied mostly on big trucks and racing cars, or you can use it on usual cars? I think questions about the applications would be of tremendous interest for the technically inclined public. Thank you again for the inventing this great product.

[@AlexYarrr]

What happens on 3:44? Is this the lube coming out from between the two washers?

[@SkateSpace2012]

They use soft glue to keep the 2 parts together, my guess that that is the pushed out glue.

[@monkeyjuju7441]

I feel like this could just create a different manner of failure not typically seen with the other methods tested that don't need to dig into the surface material. I'd be interested to see an actual long term test with different materials and types(castings, sheet metal, billets, etc.) To see the actual effects this has on the material that none of the others would. I mean if it causes metal fatigue due to the vibrations reverberating through each of the impressions causing metal fatigue and ultimately catastrophic failure, in a lot of cases that'd be much worse than simply having a maintenance schedule that includes regularly tightening bolts. For me, 40 seconds doesn't really prove much in that respect, so it's hard to say if they're really a better choice. Regardless I'd definitely be willing to at least give them a try to see for myself though

[@kalijasin]

The plain washer gave the nut a smooth surface to move and glide across as the nut was loosening.

[@johng3960]

What frequency was your testing machine running at? According to this video every engine head bolt is finger loose now and we know that to not be true. Safety wire is a back up for if some strange reason the bolt loosens. Remove enough properly torqued bolts with safety wire and you know the safety wire isn't holding the bolt torqued (probably has something to do with proper engineering specifying the appropriate bolt, thread pitch, and torque for the application). Also, have never seen many, if any torque specs calling for lubricated threads, lube on shank only.. The details of DIN 65151 seems to be locked behind paywalls.

[@NordLockGroup]

Hi John! When performing a Junker Test according to DIN 65151, the frequency is set to 12,5 Hz.

[@Tijuana_No]

What type of material are they made of? Can this be use in manufacturing? Looking for stainless steel

[@NordLockGroup]

Hi, Thank you for your question. Nord-Lock's washers are available in 5 different materials - steel, stainless steel, 254 SMO®, INCONEL® / HASTELLOY® and C-276 INCONEL® 718. You can read more about our stainless steel products here: www.nord-lock.com/nord-lock/products/washers/selection-guide/ I hope you find the information you are looking for, otherwise feel free to contact us via [e-mail]. Have a nice day!

[@justbanter8727]

super video thank you - just the info I needed

[@sajidarodiya7289]

M. .

[@freddiecrush]

Do you have any testing for a type c lock nut?

[@jimsvideos7201]

Good pitch.

[@আবুবকর-ন১ধ]

is it only use lower bolt head und under nuts or is it possible installed between two bodies to prevent the rotation between the two bodies two?

[@Reiner_Markenfreund]

Frohe Weihnachten 2023 ff. Mit Nord-Lock halten Sie Kurs. Garantiert. SJ vD BRD Michael Frithjof Müller

[@printxii]

I would like see a harden bolt test, see if it still digs into the nut and steal.

[@NordLockGroup]

Hi Dan! We do have these kind of tests, but unfortunately not in video format. If you would like to see pictures from the test, please email us at [e-mail]

[@ronb1071]

Aircraft bolt with castle nut and wire are tride and true

[@adbilahsan5286]

thank you very much

[@dansingleton7689]

Do you have a similar test using Belleville style washers? Curious how they stack up in there.

[@mrs.o.4528]

To Nord-Lock Group. Have you had any installations on heat exchangers in high pressure and high temperature service in petroleum refineries? What was the outcome and how reliable are they for this service.

[@NordLockGroup]

Hi! Thank you for your comment. Will you kindly contact us at [e-mail] so that we can provide you the detailed information about your question? Thanks again!

[@pleappleappleap]

If the bolted connection is deliberately loosened and retightened several times, does the repeated impression of the Nord-Lock washer affect the strength of the load-bearing surface and the face of the nut?

[@NordLockGroup]

Usually the Nord-Lock washers will go down into the same impression marks in the mating surface. But the bolt or the nut as well as the Nord-Lock washers have to be replaced from time to time when loosening and re-tightening the bolted joint repeatedly.

[@ryoder6279]

Great video!!!

[@sphillips6357]

hi, can it be used on the clamp nuts used on a Dayton type wheel? In the mounting process the nuts sometimes need to be loosened up slightly and retightened to evenly spread the torque around the wheel so the wheel runs true. Search part number 452010C1 to see a picture of the clamp.

[@tednugent2973]

Are nord-lock washers good for oil pans? Concerned that you need a lot of tightening, while with an oil pan, you shouldn't over tighten to prevent squashing the gasket.

[@NordLockGroup]

Hi Ted, Nord-Lock washers can be used even if the joints are immersed in oil. In order to not squash the gasket, the tightening must be accurate enough. With a good torque wrench and using lubricant on the thread and under the bolt head / nut (tightening element), an accuracy of ±10% is easy to achieve. Important to use the right torque value since different lubricant has different friction coefficient. It is also vital to tighten the joints clamping a gasket as evenly as possible and using a star pattern when tightening joints in a flange with gasket is common practice. If the joints are immersed in oil, it may be a good idea to use non-glued Nord-Lock washers. That would eliminate the risk of the glue contaminating the oil. We hope this answered your question.

[@tednugent2973]

Nord-Lock Group - Thanks

[@2slofouru]

It's a clever design, but how does it affect the initial torque setting of the fastener? Seems like the grooves on both sides of the washer pair would add significant friction.

[@NordLockGroup]

Nord-Lock washers will add additional friction between the washer and the head of the bolt. But this additional friction will not add to the torsional stress in the bolted joint.

[@sohan2510]

Will nord lock washer work on hot surface ? The surface may reach upto 180° celcious.

[@ktkace]

NGL. the nyloc graph is impressive , cant get wedge lock in Taiwan for my bike thou

[@JustChasingRainbows]

2:05 the half nut should go on first at 50% of the torque, then the full nut at full torque.

[@TheEZFix]

Why didn't you guys try Loctite?

[@nic12344]

I would like to know how it compares to RIPP Lock. Their Junker test seems to indicate similar results.

[@NordLockGroup]

Hi, we have not filmed any test comparing the Ripp-lock washer yet. Since it is only one washer with serrations it is a friction locking method. This means that during tightening or untightening it will damage the contact surface against the fastener or the mating surface.

[@echosmyth5021]

Well, what kind of washers are holding the Junker machine together???

[@BOOT]

A ny-lock or jam-nut shouldn't completely come off if it does loosen

[@NordLockGroup]

It is true that a locking nut usually do not loosen all of the clamp load as the locking nut will squeeze around the threads of the bolt and that added friction or squeezing force will keep a low clamp load in the joint. But it is still a friction locking method and there is always a risk that a friction locking will start to rotate and lose a lot of clamp load.

[@cinderclawz]

Loctite red. I would be interested to see.