How Strong Are Bolt Threads? Hydraulic Press Test!
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- čas přidán 25. 03. 2022
- How strong are hex nuts and bolts? and can we crush this giant ones? We are going to use our 150 ton hydraulic press and 240 force sensor to find out!
Our second channel / @beyondthepress
Our fan shop www.printmotor.com/hydraulicp...
/ officialhpc / hydraulicpresschannel
Do not try this at home!! or at any where else!!
Music Thor's Hammer-Ethan Meixell - Věda a technologie
Here is link to the key way machining video czcams.com/video/ENU8ABkH4NA/video.html
7:46 SNAP!!! It sounded like a firecracker, LOL 🤣🤣🤣🤣🤣🤣🤣
...and for todays extra content... nothing. :(
Hoped for: "It's a clay bolt that can attack nuts and is really dangerous, so we have to deal with it."
In tension it should be the same result, no?
@@bradpotgieter4008 not really, usually the bolt breaks.
Edit: czcams.com/video/BQzABbhwlDM/video.html
Also fine pitch thread is usually stronger, it tends to hold better.
you need longer nuts :P mor engagement area
"Hard bolt. Soft nut." Words to live by.
🤣
How does his wife feel about that? "I don't have hard nuts"
I felt dumb for laughing when he said that but, cmon... soft nut is pretty funny lmao
Yeah, "hubrid" model. 🙂
"Hard bolt, soft nut. Doesn't help." RIP fellow hard-bolters.
Would be cool to see some more variables tests.
- Fine vs coarse threads.
- Difference thread forms (acme, 60° V, square)
- Different amounts of thread engagement
I like the way you think.. nice!
Came here to say the same
also buttress threads except that's a pull test.
Also grades! Thanks.
I would add one more thing: the bold heads have raised lettering, which prevents the bolt head from turning. I'm curious what would happen if the bolt head were ground flat and polished smooth, and a dab of lubricant were put on the bolt head so that as the press comes down, the bolt can turn. Would pressing the bolt that way cause it to turn and screw into the nut? What if some lubricant were put into the threads of the nut?
I had been waiting years for this. Did not disappoint at all. Now I want to see you invent something to do with the massive one.
I have good plans for them :D
@@HydraulicPressChannel and we will be right here ready to see what you have done to it :D
@@HydraulicPressChannelI'm both excited and scared for your health!
Invent something......you mean drill a larger hole. That's it. Invention done. Jesus christ
You and me both!!!!!
Thanks for taking the time to saw that big bolt and nut in half! Very interesting.
6:40 "The effect is the same, no matter the size" Words to live by.
👇
stolen from mister hat
I'm super impressed how accurate you guessed the pressure each time! especially the last one!!!!!
There’s no guessing involved. It’s called opening the machinery’s handbook to the table labeled “metric bolt ultimate tensile strength”…
@@kimsmoke17 Exactly
@@kimsmoke17 I am way too lazy for those :D
And its the FORCE, not the Pressure. Completely different things.
@@jhidley1 dude, calm down. First of all thanks for the correction. Secondly, the instrument is called a hydraulic press so the term pressure automatically feels suited. Also pressure is force per area so calling it something COMPLETELY DIFFERENT is a bit ridiculous too, don't you think?
Very interesting how the M26 and M42 bolts start to get crushed and deforms before the threads let go!
Yeah, technically *that* is the failure point. The second a structural member of any sort goes into plastic deformation, the part has failed. So the numbers he is testing here is yield strength, which is never actually used as the "real" strength of the steel.
Well theres a big difference in the bolt steel, aswell as the thread composition itself
What i mean is for the smaller sizes the bolts are made out of pretty cheap shit, aswell as having a very coarse thread, which ultimately leads to lower strength
The m26 thread seems to be a 1.5 TPI pitch, rather than a 2 TPI or even coarser, if the smaller sizes were 1 TPI pitch well then it would definitely take alot more
When you start working on threads you start to understand why shit fucks up
@@samtimo3002 I didn't catch the grade of all the bolts either, wish he had shown all of them. I also wish he had tested the difference between an 8.8 and a 10.9 bolt/nut combos. You could really go down a rabbit hole here!
@@samtimo3002 All the zinc plated bolts were the standard quality 8.8 and if a metric bolt size the thread pitch not metioned its corse, the thread pitch increses with the boltsize. The thread pitch is measured from thread to thread M16 is 2.0mm M24 is 3.0mm M36 4mm
That’s typically what you would want so you can get the full strength of the bolt. If the threads go before the bolt even gets plastic then it’s not so good. There is the fact that bolted joints don’t carry the full external load on the clamped joint (in addition to the bolt tension) since the sub-straight is usually elastic as well, so in service it may behave differently.
This is some of the best content on this channel for a while. I love these kinds of stress tests. Great video, thanks!
Your videos as well as your accent never disappoint and just make my day!! Keep it up!!
What accent?
@@Lohjangrilli His finnish accent haha
@@Lohjangrilli Totta... 🤣
Perkele
Great test! I would have been interested to see what difference a finer thread would make.
That would be interesting to see what different thread pitches at a given diameter would yield.
To take that a step further, I wonder how an acme thread would hold up.
It would make no difference at all testing it this way.
The bolts actually compressed quite a bit before the threads have way.
If the bolts were in tension as the usually always are, they would split right where the thread meets either the smooth party of the shaft or at the screw head.
A finer thread is less deep, leaving a bigger core, so stripping the thread like we saw: this video becomes more common.
The thread form (i.e. trapezoid) would make no difference the way these screws were tested.
I have no experience in trapezoid threads, but my guess is in tension the screw would snap before the threads give way.
@@capitaleyes4942 would only depend on who was using it, willy coyote or roadrunner.
Yeah they should compare "Fine Metric" bolts to regular ones. More threads and harder material.
Interesting! Also pretty good guesses on the breaking force. As others, I'd like to see a coarse vs. fine thread comparison!
This is one the the top ten channels on YT! I've learned so much about the physical limits of materials by watching these videos.
This was excellent, and produced a lot of relevant information.
You both put a lot of work into this channel and we all appreciate it. I’m sure they’re expensive to make too. Your videos are always great!
This was very impressive in more ways than one. First, your estimates were almost perfect, and second, the pressure it takes to break the bolts/nuts. Awesome video!!
Thank you for posting this. As someone who knows very little about various fasteners, I have always wondered how strong nuts and bolts are, especially considering how often they are used in critical structures and safety equipment. This video was certainly eye-opening.
Very interesting experiments. Your tests help inform me regarding the relative strength of things that I thought I knew well. Thank you for doing this and posting it. I like your accent, which is a big plus.
Would love to see this done on a 1"-8UNC bolting setup made out of SA193-B7 / SA194-2H as this size bolting is used everywhere in power gen, steel, chemical plants and oil refining.
I used work in a business that cut and sold studs. I’ve seen a hell of a lot of B7 studs and 2H nuts in my time. All for petrochemical work and chemical. Some super duplex studs would be fun to thrash in the press. It would be good to compare their before and after x rays. I imagine in Finland they’d all be metric threads, even for perochem.
You outdid yourselves, that boom and the thread blow out was epic, and the cut away is especially neat to see
Try "Fine metric" bolts for comparison!
They have more threads and are harder than a "regular 8.8" bolt/nut curious to see how much more weight they can take.
You know you're a guy when out of dozens of videos about everything under the sun, when you see a thumbnail of a hydraulic press with a nut and bolt positioned under it and the question, "How strong are bolt threads?" your reaction is...
"I MUST know!"
Very interesting demo..great to see many opinions. Provokes really good engineering discussions
Great video. Find a way to do the same thing in tension (instead of compression). I have heard that the bolt will break before the threads. Since you did in compression, the bolt compressed and got thicker but won't break.
This seems likely. I broke a bolt under tension yesterday. It fractured at the top of the nut. The thread held it just fine. Only a tiny section at the fracture site is slightly warped, as the bolt was torn apart there.
Why do that ? You have cross section, you have material , you can calculate the tension that will break the bolt .
The bolt will break at the root of the thread as that's the area with the smallest diameter and cross sectional area.
@@Skidrrow why do anything on this channel? For fun of course. More about just showing bolt breaks before threads.
All you need to do is to tighten a bolt with a nut on it, in some hole. How often did we see damage threads, and how often did the bolt stretch apart? From my mechanical experience the threads are more often the weakest point. You typically need a deep threaded hole, like in an engine block, for the threads to be considerably stronger than the bolt, in that case theres like 2-3 times more engaged threads than with a nut. Still, depends on type of bolt and nut, i have stretched apart a few bolts too. Straightness is cruicial too, if the bolt is allowed to bend it will break off much easier.
I know I'd love to see the work videos! I like how precise machine work is.
Check out Cutting Edge Engineering’s channel if you already haven’t Curtis is a really cool guy
The timing of this video is impeccable. I just broke an M8 yesterday. Seems to be a fatigue failure under tension. The bolt fractured at the top of the nut. The nut seems to be in perfect condition. The bolt’s thread also looks great except for the very ends where it fractured. It’s clear the bolt was simply ripped apart before much else could happen. Extrapolating from this video, the M8 would probably take 3 tons or so under those conditions.
I'd like to suggest Carroll Smith's Nuts, Bolts, Fasteners and Plumbing Handbook. Good guide for evaluating the applications for your fasteners.
@@jdawgmotor330 FYI, I hadn’t touched that bolt or anything near it. I just literally got to pick up the pieces.
Absolutely perfect test! Thank you, one of my favorites!
I have been watching this channel for years now, and this video caught my attention immediately. I've always wondered how strong these nuts and bolts really are because I use them on almost a daily basis when I go to work
"I think that we're not able to break this..."
You're both really awesome, love your content 😎😎🔥🔥👏👏👍👍✅✅
Very interesting I've been a subscriber for about 3 years
The most educational video I've seen from this channel. I'd love to see another video of 1 bolt/nut size but show various different material grades so show how the thread sheer strength compares.
Loved it. Looking forward for tomorrow's BTP video. Cheers.
For years I've been wondering what you actually have the press for, so I'm definitely going to check that other video out.
Would love to see a fine vs. course thread comparison. Loved this press test on these bolts.
That would be interesting to see! IIRC the fine threads are actually stronger (at least in tension).
You can see Lauri getting better and better at his guessing 👌
This was really fun thanks for thr video
Terrific video. Love the concept. More please
Typically, most bolts are roll formed threads, while nuts (and other internal threads) are cut.
Roll formed threads are usually much tougher than similar cut threads per unit volume, but with a bigger diameter on the nut threads and a smaller diameter of the bolt threads, this tends to equal things out a bit.
Really good demonstration! I would like to see testing between course and fine threads of the same size and grade fasteners, and also the differences in each of comparable size, thread, and grade fasteners in metric and standard.
Would like to have seen the different between rolled and cut threads
Same here, Form tapped hole VS cut tapped hole.
Really cool how you all do real work with this press too. Nice video!
I love how (unintentionally?) HPC videos like these are. Lure them in with a funny/interesting concept, and then you make them think: what is 150 tonnes going to do to ___? What's it actually done?
This was really cool. I think it would be cool to see the difference between different grades of bolts of the same size. Grade 5 vs Grade 8, etc.
His bolts are metric. So the grades are different. But the black ones he had were grade 12, which is harder than SAE grade 8
@@myselfremade Yeah, I did not know the metric equivalents. But seeing the differences for bolts that are the same exact size would be cool.
Or even course thread vs fine thread.
@@myselfremade the black bolts weren’t grade 12.9. They were 10.9, as can be seen by the markings on the head at 2:04. 10.9 is the same as SAE grade 8.
12.9 exists and is about 20% stronger than 10.9, but it is uncommon for hex heads. It is common for socket heads.
Great video as usual! Very interesting to watch!
I would suppose that this kind of test and resulting info/failure data, has to be helpful for something or some industry out there!
I would be curious to know the follwing:
1. How the same kinds of bolts fared under stretching instead of compression, because that is how they're actually usually stressed IRL.
2. Differences between different hardness grades of bolts/nuts, within the same diameter
3. Differences between different thread pitches and types, within the same diameter
If you also mentioned some typical uses for these bolts, it would be really cool info to know too!...
I would really love to see a video of stress test comparing the bolts that are used for the very bottom structural foundations of tall skyscraper buildings, the mounting bases of extremely tall (100 meter plus tall) radio, cellphone, microwave, etc. towers, the mounting bases of extremely tall utility power line poles, like the kind that go cross country and directly out of power plants, also the kind used for the mounting bases of wind farm wind generator towers, very large bridges, epecially the large suspension types, the largest bolts that help hold together the very largest ships and cargo barges, etc... At least some of THOSE types of bolts mentioned above have to be some of the largest and strongest ones in the world, I would suppose!
BTW, what is that one very largest bolt that you have there, (the black one that you didn't even attempt to crush), what is that one from, or what is it intended to be used for or on?
All the strength numbers have already been found. There are typical ranges and values for every aspect of fasteners. Very rarely do we get to see testing to failure though. I'm curious if these values would change if permanent thread locker was applied.
@@seitenryu6844 I realize those tests have already been done, (they would have to be, by the manufacturers, etc., for the safety of everything big), but I was just saying that it would be really cool to be able to actually see videos of exactly HOW they come up with those strength numbers, because I agree that it's extremely rare, (if not totally impossible), for the public to ever get to witness any kind of failure limit tests like that being done on camera!
Not sure if threadlocker would change these kinds of results or not, but that is also a good question.
@@JoeJ-8282 Look up ultimate tensile strength testing. There are videos showing tension until failure. I guess more what you're getting at is, did they test bolts to come up with target strengths, or are these values calculated based on known material properties. Many tests aren't necessarily destructive, because you don't design safety critical items around UTS. You'd design way below that.
thanks for all this additional work (cutting bolt in half, using harder material bolts, adding slow motion, showing after math from different angles)
Excellent vid keep up the good work!!
Don't think I've ever seen a bolt with threads stripped right off. More interesting than I expected.
They completely sheared off like springs. Incredible to say the least!
It could be the manufacturing process, the other bolts might have a rolled thread and the big one might be a cut thread. Rolling makes the thread stronger by shaping it, cutting removes material.
Nice! Few days ago I saw memorial bell (probably around +200 kg of bronze casting?) bolted to it's harness with few measly screws (M12 by the looks of it?) and was wandering how strong that type of fixture is.
Apparently, A LOT stronger than it need to be!
Because of videos like this i love YT! Very, very interesting, thanks a lot!!
That was fantastic! That last bang was legendary!!!
I’ve always read that fine threads are stronger than a comparable bolt with course threads. If you get a chance, that would be interesting to see.
Pitch dia of fine thread is greater than coarse thread, and area is a factor in strength.
would like to see 3d printed nuts tested, great entertaining video!!!
The best show on youtube, no doubt! Thank you !!!
I am a sales guy in a hardware store, mainly in the nuts and bolts section. This was a fascinating set of crush experiments!!
Not going to lie I'm very impressed about how easy with 1 hand he picked up the big bolt
It’s because he picks the same weight up every time he takes a leak lol.
Machinists, man. They're strong as hell.
@@The_Keeper those are the ones that are scare not the bodybuilders
Weird timing, but I actually just saw a video a few days ago, and one thing they mentioned was that with nuts and bolts, something like 80-90% of the load stays in the first one or two threads.
Yes, it's the first few threads that carry the load.
Yup -- though I'm not sure if that's still true once the bolt gets close to breaking.
Wow, that was great. Very well done and most interesting. Thank you
Lauri you rock! Love the channel and content! I'm here for the algorithm! Peace
Would be interested in seeing the shear stress capacity.
Me too. That would be a test for hardened pins. Bolts are designed for tension and compression, pins take up shear forces.
And the forces will be much stronger indeed. Pulling a bolt is easy, and it's actually an example of a shear failure not tensile. The threads only need to smooth out the bumps and valleys and it will pull right through.
Smaller diameter bolts have so much thread engagement that the bolt itself tends to fail first, larger bolts have so much cross-section in relation to thread engagement so the threads get stripped off and the bolt doesn't stretch at all
The hard are grade 10.9s, others are grade 8.8s. 10.9s are heat treated
Very Interesting to see how the fasteners failed. I would have thought the nut threads would have failed as well, if they are both the same grade or hardness. Your commentary always makes me laugh. Thanks for the fun and educational videos. I really appreciate them.
The force per linear mm on the root of a female (nut) thread is less than on the root of a male thread . This is because the root of a female thread has a larger ID . This means the bolt thread almost always fails before the nut.
This video is not a good test because the nut and bolt are under a compressive load.
@@paulg3336 Compression loads are the only ones that a bolt or screw is ever supposed to see. If it ever sees a shear load, then the joint design is defective.
@@jhidley1 I think bolts are way more likely to see tensile loads rather than compressive loads
@@jhidley1 soft bolts are stronger in sheer force then tension, hardened bolts are stronger in tension then sheer.
Bolts will see all three forces, but should see tension and sheer forces under normal use, and never compression.
@@sjorsangevare Of course. I had a brain fart.
You know your nuts and bolts 🔩. Very interesting, especially the M42 .
Great work and thanks for sharing.
I haven’t tuned in for a while. I miss your destructive style. Plus your English has improved. Thanks for being here.
Really depends on the material and the rating. There are huge differences in quality within the same size and configuration of nut and bolt
Looked like they were all 8.8 bolts
its because bolt threads are often stronger since they are normally rolled where the nut thread normally is cut.
7:43 literally stopped my heart for 3 seconds. was not expecting that
As a mechanical Engineer I found this absolutely fascinating! My guesses on failure point were fairly close as well.
I've heard of explosive bolts before, but never figured on this. Nicely done.
Because of the size of the thread, especially on the M16, I would have guessed it could take not even a tonne of pressure... Almost 13 tonnes is incredible.
If you had to rely on that, taking safety margins into account.. You would be a fool to put more than 500 kg on it.
Imagine a Ford Focus suspended on four M16' bolts. You like the feel of that?
It's the kind of thing when the boss tells you to add more bolts without doing any math,
and it is because the customer will not do the math either. It won't look good to anybody.
Threads are stupidly strong because of how much surface area there is between the two mating components.
@@Kumquat_Lord Stupidly strong compared to what?
Threads are stupidly weak.
@@karabinjr you can safely lift 2000 pounds easily with a single tiny 1/2"-13 bolt.
@@Kumquat_Lord Safely?... You are not an engineer and you did not understand what I was saying.
Really good video, I’m just curious now what’s stronger metric bolts or standard, fine thread or corse, besides grade 5 and 8 bolts.
Metric IS standard where i come from.
Imperial is old school and well out of date.
@@rhyswoodman6781 yup there’s only about three countries that use the imperial system. But it works for us.
Yes I agree what ever works for you.
Although on an international level it can sometimes throw an (imperial) spanner in the works. 🤣 see what I did there.
Love your work mate 👍
I just went to a hardware store and was wondering how strong these were when I walked past them, good timing!
Good 👍
Nice video :) I was taught that bolts should be designed to withstand sheer stresses if possible, and as a last resort in tensile/compressive situations. They are a lot stronger in sheer, and the failure tends to happen in the surrounding material, not the bolt. They are also less sensitive to tightening procedures that way, which are a big source of quality control problems. Could be cool to see some sheer tests with different thickness of plate :)
I want to see a test with different common threads! Like M8 vs 5/16, metric coarse, metric fine, UNC and UNF. And also M10 vs 3/8! I mean, I could look this up, but watching your videos is much more fun! Also, it would be interesting to see if there's a difference between pushing and pulling!
Just found ur channel I grew up in my family’s Machine shop watching stuff like this
This video was NUTS!
Lmao
That made me smile!
This information is surprisingly useful, especially to a lay person like myself. Gives a good idea what these sizes can handle.
Your videos are always fun! And surprise me when I laugh out loud at some points
Love it! I think we are not going to be able to break it, but we can always try. True words to live by.
When that M42 broke and the threads rocketed up around the shank, this was my *literal* face until you came over and picked it up: 😮
But, as shocking as it was to see that, in even more surprised to see that the nut threads were intact... 😳
Which now it begs an answer of whether that was the same failure mode on all the smaller bolts, or did they have some nuts that failed, too? OR if that test was a one-off, and redoing the test with the same M42s would have different results... 🤔
Either way, that one nut deserves its halves to be mounted on a plaque, with the title: _"Pritty Got Damn Strongk!"_
I was more surprised there was no scream from Anni! Where was she?
@@mrrandomperson3106 In a previous video, he'd said that she wanted a bit more time to do her own stuff, but she (or maybe Laurie) wasn't sure quite what she'd do. Might be uploading stuff to her own channel that (apparently) hasn't seen be content in some time, or I think he said she had a blog as well.
Either way, she'll still be around thankfully, just not for *every* video like she had been 🙂
_(heh Ain't it funny, the seemingly trivial things we get accustomed to and "miss" immediately when we randomly notice it's curiously absent? 😋)_
@@mrrandomperson3106 She is working again, at least part time, at Ikea as she was looking for a bit of a change from doing nothing but videos.
Bro you guys are nuts I love it
Niceee
I love that you took the time to cut the Bolt in half. You have a true spirit of curiosity.
The modified grain structure of the steel in the bolt would look great under a microscope.
My goodness this is too cool! Thank you!
As an engineer I find this highly interesting, can you do smaller ones say m8 up to where you started
Smaller still, preferably. Would love to see a few M4 and M5 that are all over my bicycles. Either way, great content!
As an engineer, the smaller ones fail the same way…
These videos are always oddly satisfying. What amazes me is how, after all this time and so many videos, there are still so many things to (ethically) crush.
6:39 ”The effect is the same, no matter the size”. That’s exactly what I needed to hear.
I love this. Can you test the shear strength of different/common bolts, screws, nails, etc?
i can only imagine how much those huge bolts cost.
And I cant even imagine.
7:47 Really, really needed a headphone warning there. I now have tinnitus and I think I pulled a muscle jumping. I would be curious to see what happens with the same threads but on a longer (or wider depending on how you look at it) nut so that it's got more interlocking threads. Interesting video anyway.
This never gets old. I swear though, every time I take a sip of my coffee is the part when something snaps.
excellent vid. this ( series) WILL be used in mechanical engineering classes ! Please do auto or structural bolts with different matched hardnesses and maybe fine vs coarse threads.
7:45 omg that scared the shit out of me. I had my volume WAYYYY too high
I got also scared pretty well while filming. I am standing like 1.5 meters from this shit :D
@@HydraulicPressChannel Dude you play with thermobaric bombs for fun, I doubt it scared you much lol.
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Great video. Really informative for anyone building anything. Next one , how about SAE sizes, 1/4- 3/4" and by grade.
I see that you very quickly changed the title of this video, from the time I got a notification about it a few hours ago, until now, to make it less likely to be taken out of context... I would suppose that the words "HUGE Nuts & Bolts" as was originally in the title, was probably already getting WAY too many laughs and perverted comments, LOL!
Great video as usual though, this kind of test has to be helpful for something or some industry!
I would be curious to know the follwing:
1. How the same kinds of bolts fared under stretching instead of compression, because that is how they're actually usually stressed IRL.
2. Differences between different hardness grades of bolts/nuts.
3. Differences between different thread pitches and types
If you also mentioned some typical uses for these bolts, it would be really cool info to know too! Like having bolts that were used for the very bottom structural foundations of tall skyscraper buildings, the mounting bases of extremely tall (100 meter plus tall) radio, cellphone, microwave, etc. towers, the mounting bases of extremely tall utility power line poles, like the kind that go cross country and directly out of power plants, also the kind used for the mounting bases of wind farm wind generator towers, very large bridges, epecially the large suspension types, the largest bolts that help hold together the very largest ships and cargo barges, etc... At least some of THOSE types of bolts above have to be some of the largest and strongest ones in the world!
BTW, what is that one very largest bolt that you have there, (the black one that you didn't even attempt to crush), what is that one from, or what is it intended to be used for/on?
Congrats to everyone who is early And who found this comment 👏 ❤...
No one cares
Great video and subject matter. Thanks for doing a cross section on the larger bolt. Satisfied my curiosity. Q. Would pulling the nut away from the head of the bolt be the same forces?
One thing thay makes a thread stronger is rarely discussed: extremely tight tolerances. There was a really interesting Japanese competition show called Supreme Skill and one of the episodes challenged different joining methods. The machining team discovered that square or acme threads actually were not the strongest, sharp standard threads where there were basically no tiny gaps between threaded parts, and as tight and small tolerances and as few gaps as possible, was the strongest.
The slow motion audio of the big bolt shattering was epic!
Very informative, thank you!
just love the way this guy talks love it.
Thanks for the cut away view!!
There are a lot of imitators trying to steal your thunder, but you're the man, man. 👍