How Many Threads Does Nut Need To Be Strong? 

Do their skin treatments help reverse the effects of Anni's Napalm Lotions? 😂

You have lovely fingernails, Laurie. 🤩

i would love to order from this, but its too expensive. you are from finland, but you offer an american product. if i were to order the cheapest product, which is 33 USD, use the promocode, then 23 USD remains. but i live in the Netherlands. after shipping and taxes, total price, with promocode, is 37,53 USD!! that is way too much! why dont you offer a european product for europeans? its way too expensive now, and i wont buy :(

@@sollitdude1 We have more viewers in the US than in europe so it makes more sense to promote products and services for them. Some times its but annoying to not be able to order the stuff to Finland. For example macig spoon serials would be definetly on my menu if they wpuöd just ship here 😂

Sounds just like my wife 🤣🤣

High-speed thermal camera would be cool

For a second there I thought you where going to say when he was getting his face moisturizer applied! 😋

for certain crushes i would love to see this as well as with a schlieren setup

Please do this

As cool as it would be, it would not work very well for this specific test. Since the metal is somewhat reflective, the thermal camera will just see the metal as a mirror. I've tried to measure temps of aluminum heatsinks and just saw reflections off the metal

Exactly what I thought, before the video even started playing!

That would also allow the testing of hardened nuts

Isn't that equivalent to what he did on the lathe?

He could have also used a much closer fitting bottom die so everything was in shear rather than bend.

@@d46512 in my opinion no: I think that if you remove the threads from the bold when you press it in the threads don't have anything "backing them" Of course in the nut happens the same thing but as we crearly saw in the first test the nut bends before the threads fail, so, if you have only 1 thread but the nut can't bent in my opinion it should be stronger

Maybe they could use sugar water or honey as a sort of glue.

The elements will hold and be Intresting to see what happens. Hope they will try this

Pop rocks would be my next choice.

Great idea

*Yavbrreaker, as they pronounced it years ago

Yeah I always come and binge on a load of their videos every month or so. I don't know why crushing things is so satisfying 😂

Just over seven years. Happy belated, HPC!

He doesn't just crush things, he satisfies some technical curiosities, like here with nuts and threads

Assuming a grade 8 bolt using UNC threads, the 1st thread usually takes 34% of the load. The 2nd about 23%, 3rd-16%, 4th-11%, 5th 9% and 6th takes about 7%. Depends largely on material, though.

I agree. When doing tests like these I would love to see a graph so I could visualize the data.

As a toolmaker lifting heavy injection moulding tools we go by a rule of 1.5x diameter minimum for lifting eyebolts so m30 needs 45mm of thread to lift its rated capacity

@@lukearmsby5507 I believe you are correct that's always what I've heard. But do not definitively know. But I will say it's definitely gonna depend on whether it's coarse thread or find thread as well.

I think you made a typo, the material of the bolt is most important as you say that is the part that fails. And not because the thread but because shear forces. No engineer is going to design a construction where the nuts gets pulled from the bolt that is terrible idea. What is tested here is something that should never happen. if you have something pulling on a bolt you are going to use a system with a pin. Only pressure on a nut should be by tension set to cause friction between the parts you want to pull together.

I didn't know what the reason was but it was something I had noticed

Shadetree mechanic here. Common sense dictates that thread diameter and nut material are irrelevant, and that one should simply turn both until a pop is heard, then back off 1/4 turn.

Glad real engineers commenting and not just armchair warriors like me.

I thought it was common practice to spec a lower grade nut. Grade 5 nut with a grade 8 bolt for example. Wouldnt The opposite be true in my case?

@@TheAlexfooooo Yes but I've rarely seen that (at least across industrial equipment). The only reason is if you had a threaded stud that's welded or pressed in in an unserviceable area.

FWIW, that approximation only hold up till the nut length is around half the diameter of the bolt. Once it gets longer than that, the decreasing axial load on the bolt from the loaded end of the nut to the other and the resulting elastic deformation gets large enough you an start to strip the threads at the loaded end well before you fully load the threads at the other. A few more threads and you might not even load the far end at all before pealing threads off. (That said, if you need to hold an impulse, more threads do continue to increase the amount of *energy* needed to fully pull the bolt thought the nut out of the hole.) IIRC standard nuts a just long enough to get something like 90% of the max. (It's been a while, so it might be 80% or 95%, but it's in that ballpark.)

@@benjaminshropshire2900 thanks for your comment. interesting. i'd like to know a bit more about the impulse half of it, if you know where i could look into it more. thanks.

I laughed out loud OMG. And she had just showed off the nails too by wiggling them at the camera... LOLOL!

I thought it would be a remake of U2’s “Numb” video 😂

@@peacefrog0521 There are 2 types of pleasure in this world that we shall never experience: To be a tool in the hands of Lauri and to be the face of Lauri in Anni's hands.

Miss Anni for sure.

That face was hilarious!

I'd like to think so. Thunderf00t has been cited, so I wouldn't be surprised if HPC gets cited too.

Maybe, but I assume that a whole lot of testing like this has been done to arrive at the standards we have in the first place..

@@Finnspin_unicycles Do you mean like the 'rule of thumb' which says the thickness of the nut should be at least the diameter of the bolt? en.wikipedia.org/wiki/Machinery%27s_Handbook

@@brucepeebles4939 That rule probably arrived from similar testing, but standard height metric nuts are designed to not fail before the corresponding bolt yields, and have less then 1x nominal thread diameter of thickness. Anyway, my main point was that I guarantee someone who is much more appropriate to cite than a RU-vid channel has done similar testing, so you are (unfortunately) unlikely to see any HPC video as a source in scientific papers.

K.k.kķ0p

10:00

always make sure to cup the nuts

Would be curious to learn what "absorbing force" really means in terms of physics. Maybe the nut threading is deformed such that the contact area with the bolt threading is bigger, is that what you mean?

Ah yes the cupping of his special nuts

@@landsgevaer I think he means the nuts absorb some of the force because they deform under pressure, similar to the shock absorbers on a car.

@@Aviator_Shades initially yes, but I was also thinking that the deformation of the thin nuts compresses the material at the top of the nut tightly around the bolt threads. This might add a mechanical clamping element as well as closing all the tolerances between the nut and bolt threads?

They take 98% of the load until elasticity is reached for those threads. 100% load is gained when total thread contact equals diameter of bolt. Basic mechanics.

Why does compression and tension results differ?

@@aresorum Most materials are stronger in compression than tension. 10,000 psi tensile strength steel will take more than that in compression. Concrete for example is the same way...

But wouldn't that also mean that the upper part of the nut would get tighter? Offset effects?

First 3 threads holds about %80 of the force that acts.

I second this.

That’s the one I’ve always gone by, as a mechanic. You have to assume that the thickness of a full nut has been calculated by someone for optimum strength!

wouldnt pulling the bolt have the same result as pushing it?

@@dhc2 when the bolt fails in the feild it will fail in tension or sheer. Its really strong in compression.

This is a very good point, testing in compression you totally lack the threshold cross over where the threads become stronger than the bolt. Which is the key importance of this test in reality.

Also I'm aware of 4 thread classes (fit and tolerance). I wonder if that would make any difference.

@@rayc1557 bingo! I commented the same. I was surprised to see this video. I thought that was common knowledge.

Und wen interessiert das?

@@Papperlapappmaul His comment might be out of place, but that doesn't call for such rudeness

Does the Continental version have decimal points or commas? A lot could be explained....

@@xroqus wut?

Probably less strong actually The cupping probably caused a swage-lock effect.

good idea, would be interesting to see if the layers delaminate or if they all stay together

Yes, exactly. The "Top Comment" saying that the rule of thumb is half threads per diameter of bolt is just plain incorrect.

Lol. I enjoyed this comment. I'm sure there is some snowflake out there that probably doesn't like it, but they can fuck right off. Lol.

Most bolts in automotive applications will almost always outlast any other fixing methods!

@@rkan2 I’m talking structural bolts in an aircraft application with thousands of pounds of pressure on each bolt in close tolerance holes. I’m not talking about bolting your muffler on. I’m an Airframe & Power-plant Mechanic. I’m talking about extreme loads.

Might strip the threads off the bolt first though. Which would still be pretty impressive.

@@TheExpatpom Not if the bolt has enough treads in the nut. He only went to 4 in this video. But nothing speaks against going up to like 10 for example. At some point the bolt itself will snap.

Found the engineer.

I was thinking the same thing, he should also try stacking two nuts or maybe using a longer nut

Pretty much the same thing for these shear tests, those metric threads are not directional. The difference only starts, once you are not shearing the threads anymore and tearing the bolt apart instead.