Nord-Lock Wedge-Locking Washers - Junker Vibration Test 

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.

Selling to engineers...

Andrew L

Nick

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

@@KrishanGopal-hg8cf c ,c " DC

no this is Patrick!

Ha...

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

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

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?

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).

lol

Welds can break.

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.

@@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

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

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

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

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 info@nord-lock.com. 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.

Getting smarter every day, eh? ;)

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

Thank you for the comment! Will you kindly drop us an email at info@nord-lock.com to explore the possibility of the requested test.

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

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.

@@Gameboygenius bingo

They did: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-GZnFLEZHbIg.htmlsi=9S8n-fmYtb68x8VR

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

+Joshua Bettiol thanks

@@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.

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.

Any updates?

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

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

@@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

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

@@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.

@@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 info@nord-lock.com Have a nice day!

@@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.

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

+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!

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

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

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).

Thanks for the comment! Regarding your question - after the first 20 seconds of the test and in between the 1st and 2nd test, the settlement in the joint continues. Therefore at the start of the second test the clamp load is slightly lower than at the end of the first 20 seconds. If we continue to do the test a few more times, the graph will level off when the settlement is complete. We are sure that there is no rotation of the nut by looking at the white marking and can conclude that there is not preload loss due to loosening.

Nord-Lock Group Thanks for your explanation, that makes sense. I did not realise that settlement continues following the test. I am a Mechanical Engineering student and find this product very interesting.

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.

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

just ordered some of these nord lock washers for my turbo flange after noticing all the nylon nuts coming loose. Nylon nuts lasted about 25k miles, hoping these last a lot longer! According to the graphs they should...

Las arandelas Nord-Lock aseguran perfectamente las uniones atornilladas tanto en roscas de paso fino como de paso grueso. No dude en contactarnos a info@nord-lock.com si requiere información adicional en este otro asunto.

Hi! Thank you for your comment. Will you kindly contact us at info@nord-lock.com so that we can provide you the detailed information about your question? Thanks again!

Have you tried Loctite?

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

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.

M. .

+Navaneeth Velluva This software has been developed by Nord-lock. There are many companies supplying Junker machines and they have their own software which will do the same thing. The test is a standard test - DIN65151.

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.

The effect on the base material wont decrease there grip. The washer will either fall into the old depressions, or just form new ones.

Thank you and we will take note of your suggestion.

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....

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.

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

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.

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

Also we’d never use a thread this course.

Jonathan Maclean Cheers

Jonathan Maclean all of a sudden in my recommended list. Nord lock better shoot him a few pair of washers.

Any movement in loosening direction will always take place where friction is as lowest. For Nord-Lock washers this means that movement (or intention to move) will always happen between the washers and when that is happening, the movement will be blocked by the cam wedges since sliding along the wedges will increase the distance between the two washers and slightly stretch the bolt. Using a standard serrated washer means that you only rely on friction between washer and bolt head, and washer and mating surface. The proven wedge effect is missing.

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.

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 info@nord-lock.com. Have a nice day!

I actually ended up printing them out and came on them as well.

+Destin Games And stayed for the vibrations :D

+Destin Games I came.

I tried but these washers prevented me from busting a nut.

Hi Lennart, Thank you for your question. Our washers are being used in different applications and environments. We are interested to explore more in regards to your needs and requirement. It would be helpful if you could provide us with more information about your application at info@nord-lock.com. Thank you!

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.

Nord-Lock Group - Thanks

+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 info@nord-lock.com if you are interested in that!

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.

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.

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

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

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

+Rob Brookover Thank you for your question. A Belleville washer rely on friction and performs similar to the helical spring washer in vibration tests.

There is also the so called Schnorr-washer, it´s a cup spring with flutings on it. Have you tested them also?

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

Thank you for your comment. The Nord-Lock washers are reusable, but we always recommend a visual inspection for wear prior to re-installing. Check out this short video for further information: www.nord-lock.com/bolted/video-tips-on-reusing-nord-lock-washers/

Hi! Nord-Lock washers can be used to lock the nut on a stud bolt. For more information on how Nord-Lock washers can be used, please have a look here: www.nord-lock.com/nord-lock/products/washers/product-guides/

Thanks Tom!