Most people don't get it. Titanium is not as strong as steel, only about 90% the strength of steel, depending on the alloy. But it is light as aluminum. So you have almost the strength of steel, but for a bargain of its weight. That is the magic of titanium. But it is expensive and its high melting point makes it unbelievably complicate to weld.
Not quite the same density. Aluminium density is 2.7 tons per cubic metre whereas Titanium is 4.5 tons per cubic metre. Steel ranks at 7.1 tons per cubic metre; for comparison sake Magnesium is 1.7 tons per cubic metre. Where Titanium scores mostly is heat tolerance ( hence its use in aeronautical uses) & corrosion resistance ( in chemical industries & maritime environments) being better than bronze or stainless steel. One has to carefully establish the intended purpose before deciding on which metal or alloy to use . Hope this helps. Kind regards.
Nice! It's quite impressive in general what just one bolt can hold. The most benefit from using titanium is indeed the weight to strength ratio. Apparently to just hold a certain force, there is no real reason to chose titnium over steel (high strength steel, such as the the 12.9 bolt, is better then). But it's much lighter (the density is not much more than half that of steel), so compared to it's weight, it's stronger. This is important for a space shuttle that might have quite a lot of bolts. Maybe the corrosion resistance is also better for titanium?
I believe titanium is also better in situations where temperatures fluctuate. That is certainly true in the space, depending on the location of the bolt.
It is true that this weight/strength ratio is very advantageous for titanium, because for the same weight we can put a larger titanium screw, therefore much more resistant than the same one in steel, of equivalent weight but which will be smaller
Bolted connections rely on the tension of the bolt. The clamp force clamps the parts together tight enough to keep them from sliding. The bolts, under tension, provide the clamping force. Bolted connections are not designed to use shear strength to hold the connection. The first test is a sheer test. The second test is tension load.
Agreed. Many flaws in the experimental design. The material may have the same name ,I.e. titanium, but the alloy and material condition needs to be considered too.
Probably the bolt from the shuttle is made of pure titanium, and the Chinese one is an alloy. Titanium VT6 and so on are very durable, but how they behave at low/high temperatures is not clear.
Good point. Depending where the bolt was used (inside, outside), the Buran space shuttle will endure extremely high and very low temperatures in practice (though, iirc, there was only ever one test flight).
It is true that this weight/strength ratio is very advantageous for titanium, because for the same weight we can put a larger titanium screw, therefore much more resistant than the same one in steel, of equivalent weight but which will be smaller
Also the bolts from the Buran program have been sitting about for decades - some amount of oxidation has probably occurred over time. (In addition to “we have no idea what kind of alloy it was” …)
In addition to some of the other comments, you can hear that the pressure applied to the first two bolts was done at an accelerated pace than the "Chinese Titanium". On that one, the press was working a lot slower. I don't know if this was intentional or not, but it obviously matters.
That's also what i think , but it just might be the tests . The cheap ones are as is. 5tonns +-25% , but mostly held at +-5% , but the wont throw away a batch for a 25%+- . The expensive is proven to 4.785tonns +-3% or something and always held close to the tested value . In my experience in manufacturing just because something can have a +-1mm tolerance , that does not mean that someone is deliberatly adjusting every part to max out the tolerance . This just means the production can run smoothly and a whoopsie here and there won't matter . Any good worker always tries to maintain the middle of a given tolerance .
I have a fun fact for you..we are talking 15 years ago when chinese quality was on the rise, now it has strongly declined two packages were mixed up german factory received it opened and QC department immediately called to announce the mistake, chinese factory ? assembled 500'000 modules with wrong part attached...it wasn't even the same size they forced them on, that's all you need to ever hear about chinese quality 0/500'000 quality check and not even a look on the part number or nothing, no alarms or checks on the machines too as the size and markings should be checked by cameras
@@fredEVOIXwhat you pay for is what you get, even chinese products can be good, but really only what companies buy from example. Because companies pay almost anythhing if the products goid and holds up, there is incentive too make quality products. On the other hand aliexpress stuff for the masses made with other priorities.
You should add some slotted bolts to your fixture so the plate stays together. Less to pickup and reset each time. The center bolt remains the same for sheering.
Depends what the bolts were made for. In many serious applications they have a deliberately designed failure point. Bolts are not typically made as strong as they can be (the Chinese one is perhaps) as in many applications the bolt failing at a certain load is an engineered safety feature.
A lot of people are missing the point of titanium. It's getting similar strength as steel at almost half the weight. Every gram is calculated when designing a space craft.
Isn't the shear test for the titanium bolt sorta flawed? I get you had to add to it because the threads didn't go back far enough but wouldn't that slightly change the test also with the test test wouldn't having the jig the same for all be more accurate? The first two bolts you had it spun slightly (again I get it was for clearance) but having it slightly turned like that would cause some amount of twisting when you put strain on it right?
Sometimes you need things fail. If making an emergency landing in a plane and its wing strikes a large tree you would want the wing to break off, that way it might not spin the plane and might slow its progress. Sometimes stronger is not always better.
The thing with space shuttle bolt is not that thay are stronger, but if you test 1000 of them non of wil under perform, where as the cheeper bolts are more likly to have production faults
I have a feeling that this is a test of screw's thread on the first place, then its match against the bolt's thread, finally screw's elasticity and hardness. Screw's material that is a compound could probably give better results. Threading could be manufactured in different way leading to smoother surface impacting the forces. Notice that screw is not stretching but instead there is a single "jump" acting like a hammer leading to not only thread under the screw being broken but also other have no chance to resist.
i'm surprised that in the pulling apart test the bolts broke instead of ripping of the threading. seems like way less material has to move or break to remove the threading than just breaking the bolts.
Did you fasten the bolts with proper torque? Did you use same class nuts? Did you use them beyond elastic phase to proper use 100% or almost 100% of theirs strength? Just doubts, because such things may affect the end result of the screwed connection.
it's common in europe to use a comma instead of a dot/period for decimal points, so: 9.92g (US) = 9,92g they also swap them for thousands: 100,000 pieces (US) = 100.000 pieces
It wasn't done properly, and the Chinese bolts were titanium coated steel. Plus, there are some bolts that have the threads pressed in instead of cut, so that would be necessary to know too
sometimes its good, sometimes its like the guy who bought new rtx gpu fans to replace the original noisy ones, the cable plug was with the poles switched... looking back at it, now he has a $1000 paperweight...
Unsure if the space shuttles metal is deliberatly more malleable to allow for the heat going between atmosphere and space since you want the metal to behave to some degree in many climate extremes. Too hard can shatter, too soft will snap, both issues are bad,
Compare the weight of the Bolts. I bet the space ones are lightest. And that was the requirement. Be as light as possible but at least as though as steel. If the AliExpress bolt weighs the same than the space bolt, yes go with it, else you will need A LOT more rocket fuel to lift the extra weight of these thousands of nuts built into the space ship to space. Also, how brittle or plastic would those bolts get in which temperature regimes? Idk if it is that important here, but there is more complex things to consider going to space than pure strength. Even production costs, dependance on imports vs sanctions etc.
The titanium bolts from the old shuttle…were from the Cold War era? Cast titanium? Impure? Nowadays everything is CNC machined from a chunk/block of metal/material…? Even though it’s from China, the production and manufacturing has improved from 50 years ago.
Nice video. But why do you measure force in kg and not in N (Newton)? I understand what you mean (the force equivalent to the weight of that mass, factor g=9.81 N/kg), but it would not hurt sticking to standard units when doing measurements. Also, it seems to me you compare bolts (screws) of differing diameters here. Thirdly, "AliExpress" is not a supplier, it is a marketplace.
Use pounds, be a real American! LOL! Look on Earth, pounds and kg ARE standard units!! As an Engineer, I could not give a hoot about the units, because we (us engineers) all know the difference between weight and mass - as that was day one physics.
I didn't expect a test in situation mounted as it would be used super cool :) please remember ali items are sold at a loss by the sellers, it's the CCP subsidies and us paying them in hidden ways, only learned it recently but when they offer free shipping it's actually our tax dollars that pay it >< because of political shenanigans China is considered an under-developed country and so it's out post and our money that pay the shipping >
Somun olan test yanlıştır. Somunsuz çekme koparma olmalıdır plaka kesit şeklinde ..Ayrıca makine çekme ve delme hız değerleri de sunulmaldır .. bu değerler sadece genel bir fikir verebilir ..
Hi, you do not pay enough attention to very important details due this tests. If the bolt is not fitted tightly as this Russian bolt you elongate a bolt in the same time when you try to make share stress perpendicular to it (a case with Alli express bolt). Bolt cannot change en angle when mounted to steel slabs.This is causing that part of the force working along the bolt making looks it much stronger. I assuming that the whole diameter was slightly to big for Ali express bolt. You can see an angle between a head of the bolt and the slab develops during a test visible by naked aye so at lest 1-2 degrees.
Pretty much every aliexpress titanium bolt/screw I have ever bought for my bicycles has been listed as 6AL/4V, TC4 or GR5 (all the same thing) so perhaps it's safe to assume they are of that grade. Perhaps?
in the first test the bolts were the same thickness. in the 2nd test some bolts were thicker than those from aliexpress. Not a fair fight. Aliexpress was thinner than the 2 other bolts. He had to get bigger bolts to overcome Aliexpress an 8.8mm bolt against a 12.5mm is not fair. I say Aliexpress won.
you do understand that this is not a controlled test by any means the design of the screws are way different than each other not to mention that there is probably Gauge difference between the screws in your test. and this was fun and all but it would have been cooler if you mentioned these sort of stuff although it probably would have taken out the fun of seeing David beating the goliath out of this video although David is probably thicker and have a different design and mixture from the goliath.
Without the same setup on each your data is flawed. One bolt has washers stacked, the next one doesn't. None of the tightening torques are measured. (that's a big one, the torque on the sheer face of the two sliding plates needs to be exactly the same). Bolt diameters' are all different. Not a very scientific test... but very entertaining, thanks.
EXACTLY! Finally, someone who sees the obvious. If it has a flathead... that doesn't even qualify as a bolt! It is just a screw. There is a huge difference between a bolt, and a screw. Thank you, for pointing people straight.
By rights the bolt from space should have been the strongest. A little off size, as the vacuum of space would evacuate all the air between the molecules of bolts. Cold welding. Did you notice any interesting coatings on the shuttle bolts. NASA found that when an object goes to space, parts fuse together, as if welded, sure to no air cushion between them. Is is said that great amounts of money and time are spend treating parts in preparation for space travel, so the parts do not fuse and seize together.
What the F are you talking about?? There is no "air" between the molecules of the bolts!! Learn the difference between a "solid" and a "gas". As an engineer, I worked on Space Shuttle, and I can assure you that any bullshit "cold welding" stories that you may have heard is just that - BS. PARTS DO NOT FUSE TOGETHER IN A VACUUM!! THAT IS RIDICULOUS AND GOES AGAINST ALL SCIENCE AND PHYSICS!
I have decided that I will build my own space shuttle by ordering parts from AliExpress
I didnt see him weigh it though.
NASA too...!
the screw from aliexpress was thicker.
Before that check how it retains its quality in space in very negative, freezing environment with sun radiation
They have air hoses on aliexpress 😅
Most people don't get it. Titanium is not as strong as steel, only about 90% the strength of steel, depending on the alloy. But it is light as aluminum. So you have almost the strength of steel, but for a bargain of its weight. That is the magic of titanium. But it is expensive and its high melting point makes it unbelievably complicate to weld.
High melting point could be important for a spaceship. It makes the return safer.
Not quite the same density. Aluminium density is 2.7 tons per cubic metre whereas Titanium is 4.5 tons per cubic metre. Steel ranks at 7.1 tons per cubic metre; for comparison sake Magnesium is 1.7 tons per cubic metre. Where Titanium scores mostly is heat tolerance ( hence its use in aeronautical uses) & corrosion resistance ( in chemical industries & maritime environments) being better than bronze or stainless steel. One has to carefully establish the intended purpose before deciding on which metal or alloy to use . Hope this helps. Kind regards.
True. Mild steel is actually roughly 7.85 tons m3 not 7.1 @toolsconsumables7055
Not only hard to weld, its even harder to work with it on a lave or mill. There are so many things to worry about while working with titanium
@@felix_972well we ain't gonna take your word for it when you don't know what a lathe is😂
For a fair comparison you should use the same size bolts?
I thought the China bolt was gonna break while tightening it. lol
First test screw from Aliexpress M8, remaining M6, that's why there is such a difference...
Yeah i thought the same 😅
Not to mention all the washers with huge inner diameter at 1:50 ,entertaining to watch, though.
"Do not repeat at home"? I'm the only one not having a hydraulic press at home?
Yes you are the only one without a hydraulic press😂
How do you make orange juice without one? Especially with inflation right now, I can not do without my hydraulic press.
I use mine as an alarm clock, always get out of bed in time
@@JakeSDN I´m from Basque Country, we use stones for that sort of things, search "Perurena" to make an idea 😁
Yes. I’m sorry this is happening to you. Start saving. Get a little one. /s
Lets test 3 bolts all with different tops and different diameters :)
Nice!
It's quite impressive in general what just one bolt can hold. The most benefit from using titanium is indeed the weight to strength ratio. Apparently to just hold a certain force, there is no real reason to chose titnium over steel (high strength steel, such as the the 12.9 bolt, is better then). But it's much lighter (the density is not much more than half that of steel), so compared to it's weight, it's stronger. This is important for a space shuttle that might have quite a lot of bolts.
Maybe the corrosion resistance is also better for titanium?
I believe titanium is also better in situations where temperatures fluctuate. That is certainly true in the space, depending on the location of the bolt.
It is true that this weight/strength ratio is very advantageous for titanium, because for the same weight we can put a larger titanium screw, therefore much more resistant than the same one in steel, of equivalent weight but which will be smaller
I plan to buy Titanium screws for one of my 3D printers, I can shave off over 100 grams worth of weight from the print head that way.
Bolted connections rely on the tension of the bolt. The clamp force clamps the parts together tight enough to keep them from sliding. The bolts, under tension, provide the clamping force. Bolted connections are not designed to use shear strength to hold the connection. The first test is a sheer test. The second test is tension load.
At least one of the viewers knows somethinmg about mechanics. Thats right!
Not mention 8mm 2:01 titanium bolt vs 10mm 2:32 aliexpress titanium bolt, size matters too
Agreed. First test is stuupid....
Exactly. And they did not even try get the clamp force the same by using at least a torque wrench or better hydraulic inline tensioning.
Agreed. Many flaws in the experimental design. The material may have the same name ,I.e. titanium, but the alloy and material condition needs to be considered too.
Probably the bolt from the shuttle is made of pure titanium, and the Chinese one is an alloy. Titanium VT6 and so on are very durable, but how they behave at low/high temperatures is not clear.
Good point. Depending where the bolt was used (inside, outside), the Buran space shuttle will endure extremely high and very low temperatures in practice (though, iirc, there was only ever one test flight).
Alloys are propably better than pure materials in most situations. Aircraft Titanium is always an alloy to fit the needs.
It is true that this weight/strength ratio is very advantageous for titanium, because for the same weight we can put a larger titanium screw, therefore much more resistant than the same one in steel, of equivalent weight but which will be smaller
Also the bolts from the Buran program have been sitting about for decades - some amount of oxidation has probably occurred over time. (In addition to “we have no idea what kind of alloy it was” …)
Also the fact that the Soviet space shuttle bolts are like 40 years old, while the AliExpress ones are brand new.
Not bad the Chinatanium👏
probably the shear plate were destroyed a bit on the china part and thats why they did not really shear the bolt --> wrong results
Chinesium lol 😂
In addition to some of the other comments, you can hear that the pressure applied to the first two bolts was done at an accelerated pace than the "Chinese Titanium". On that one, the press was working a lot slower. I don't know if this was intentional or not, but it obviously matters.
I don't know for you guys, but this is the best hydraulic press channel
HPC is the best , for me , from Finland .
Damn that Chi-tanium was 💪🏻
In the second test, I would have made sure the nut was the same material as the bolt.
Who's baked and enjoy watching those videos?
I'm well baked and loving it 😅😅😅😅
{giggle} I forgot what we were watching
nah I work in a machine shop and this shit giving me anxiety 😭
imma go watch some cartoons or sum
What weight of Aliexpress titanium bolt?
The washers invalidated the space bolt test.
I am sitting here watching this whilst eating a cheese and ham croissant. What has my life become.
That's sad dude. Not even any bacon..... I'm telling you a sausage Mcmuffin with bacon added is worth the heart problems.
The ‘nut up’ on the aliexpress was looser than the others…? How come?
I believe if you test 100 of these against each other, you will probably find a huge spread in the aliexpress ones and minor spread in the others
This is the difference between real NASA stuff, a significant sample of every lot would be tested to destruction, you know what you get.
That's also what i think , but it just might be the tests . The cheap ones are as is. 5tonns +-25% , but mostly held at +-5% , but the wont throw away a batch for a 25%+- . The expensive is proven to 4.785tonns +-3% or something and always held close to the tested value . In my experience in manufacturing just because something can have a +-1mm tolerance , that does not mean that someone is deliberatly adjusting every part to max out the tolerance . This just means the production can run smoothly and a whoopsie here and there won't matter . Any good worker always tries to maintain the middle of a given tolerance .
I have a fun fact for you..we are talking 15 years ago when chinese quality was on the rise, now it has strongly declined two packages were mixed up german factory received it opened and QC department immediately called to announce the mistake, chinese factory ? assembled 500'000 modules with wrong part attached...it wasn't even the same size they forced them on, that's all you need to ever hear about chinese quality 0/500'000 quality check and not even a look on the part number or nothing, no alarms or checks on the machines too as the size and markings should be checked by cameras
@@fredEVOIXwhat you pay for is what you get, even chinese products can be good, but really only what companies buy from example. Because companies pay almost anythhing if the products goid and holds up, there is incentive too make quality products. On the other hand aliexpress stuff for the masses made with other priorities.
Please write your results in your video description 👍
Need some european titanium bolt too!
You need to include some maraging steel and aermet samples in your tests. That should put everything else in its place.
Thanks for reminding everyone how much spelling counts
You should add some slotted bolts to your fixture so the plate stays together. Less to pickup and reset each time. The center bolt remains the same for sheering.
Unfair test. You can't test space bolts on earth you need to be in space to test them.
spaceshuttles starts from planets...
@@karlkaplan6435 No planet shuttles are called planes.
Lol
Both are from earth both will be tested on earth
A bolt on earth is te same in the space stiupid
Depends what the bolts were made for. In many serious applications they have a deliberately designed failure point. Bolts are not typically made as strong as they can be (the Chinese one is perhaps) as in many applications the bolt failing at a certain load is an engineered safety feature.
A lot of people are missing the point of titanium. It's getting similar strength as steel at almost half the weight. Every gram is calculated when designing a space craft.
Isn't the shear test for the titanium bolt sorta flawed? I get you had to add to it because the threads didn't go back far enough but wouldn't that slightly change the test also with the test test wouldn't having the jig the same for all be more accurate? The first two bolts you had it spun slightly (again I get it was for clearance) but having it slightly turned like that would cause some amount of twisting when you put strain on it right?
Would be nice to see 12.8 class bolts checked for shear strength as well
Sometimes you need things fail.
If making an emergency landing in a plane and its wing strikes a large tree you would want the wing to break off, that way it might not spin the plane and might slow its progress.
Sometimes stronger is not always better.
I'll now be building my project car with AliExpress bolts😂
Ok You used titanium bolts and how about nuts? Hardened class? Cheers!
what was the torque used on the bolts in shear test? seems clamping force will affect the shear. test methodology looks not so great.
No parafuso de titânio espacial as anilhas fazem diferença?!
The thing with space shuttle bolt is not that thay are stronger, but if you test 1000 of them non of wil under perform, where as the cheeper bolts are more likly to have production faults
impressive ..... most impressive
I have a feeling that this is a test of screw's thread on the first place, then its match against the bolt's thread, finally screw's elasticity and hardness. Screw's material that is a compound could probably give better results. Threading could be manufactured in different way leading to smoother surface impacting the forces. Notice that screw is not stretching but instead there is a single "jump" acting like a hammer leading to not only thread under the screw being broken but also other have no chance to resist.
Can you compare relevant weights?
Ahhhh, the scale. I know a man of culture when I see one. 😂😂😂😂
i'm surprised that in the pulling apart test the bolts broke instead of ripping of the threading. seems like way less material has to move or break to remove the threading than just breaking the bolts.
Did you fasten the bolts with proper torque? Did you use same class nuts? Did you use them beyond elastic phase to proper use 100% or almost 100% of theirs strength?
Just doubts, because such things may affect the end result of the screwed connection.
And the first test in shear he used spacers behind the nut and to me it seems that's undo stress on the bolt compared to the other two
Since when has the strength class been tested for shear?
yes ok, but what year are the aerospace ones?
1998-2002 if I’m not mistaken
The dioxide on the Chinese ones 😍
I'm impressed that xiium is comradable to stalinium... oh, sorry comparable
They were going to do this test with original Boeing bolts , but couldn’t find any
Proper toque makes a big difference.
"Do not repeat at home"
Just do it outside
Alixpress wiped the floor with them
Idk what AliExpress is expecting people to do with those bolts. They must really know something I don't lol.
Have I misread something or has the author used a comma instead of a decimal point when showing the grams?
it's common in europe to use a comma instead of a dot/period for decimal points, so:
9.92g (US) = 9,92g
they also swap them for thousands:
100,000 pieces (US) = 100.000 pieces
The pull test value needs to be halved since physics and stuff.
It wasn't done properly, and the Chinese bolts were titanium coated steel. Plus, there are some bolts that have the threads pressed in instead of cut, so that would be necessary to know too
sometimes its good, sometimes its like the guy who bought new rtx gpu fans to replace the original noisy ones, the cable plug was with the poles switched...
looking back at it, now he has a $1000 paperweight...
have you tested different chains?
are you china?
Повторите эксперимент при сверхнизких температурах. Вообще не удачное сравнение
I figured Chineseum would have been the first to snap
My favorite moment was when he weighted the aliexpress titanium screws
first time i have even seen china product out stand
You would be surprised how much chinese products are the best in the world, just maybe rebranded.
China made everything (i mean they can mass produce things at cheaper rate) it it us to choose the quality of it then rebrand it 😂
Ho comprato uno Shuttle da AliExpress. Lo uso nei fine settimana e sono molto contento 😂
Unsure if the space shuttles metal is deliberatly more malleable to allow for the heat going between atmosphere and space since you want the metal to behave to some degree in many climate extremes. Too hard can shatter, too soft will snap, both issues are bad,
To be fair, the bolts need to be tested in the same temperature as the "space shuttle" has been designed to work.
Compare the weight of the Bolts. I bet the space ones are lightest. And that was the requirement. Be as light as possible but at least as though as steel. If the AliExpress bolt weighs the same than the space bolt, yes go with it, else you will need A LOT more rocket fuel to lift the extra weight of these thousands of nuts built into the space ship to space. Also, how brittle or plastic would those bolts get in which temperature regimes? Idk if it is that important here, but there is more complex things to consider going to space than pure strength. Even production costs, dependance on imports vs sanctions etc.
Lets not forget that russian titanium is just copper thats painted silver
The titanium bolts from the old shuttle…were from the Cold War era? Cast titanium? Impure? Nowadays everything is CNC machined from a chunk/block of metal/material…? Even though it’s from China, the production and manufacturing has improved from 50 years ago.
Guess what: those "buran" titanium bolts weren't from the Buran or titanium.
All bolts would need to be the same diameter weight for a fair test
01:19, 02:08 and moreover: counterclock thread o reversed image?
Funny, you didn't even torque them to a specific value😂
Who’s the genius that decided a material made in Russia could be used as a quality benchmark?
I see you got lucky and found the two good bolts in china
Nice video. But why do you measure force in kg and not in N (Newton)? I understand what you mean (the force equivalent to the weight of that mass, factor g=9.81 N/kg), but it would not hurt sticking to standard units when doing measurements. Also, it seems to me you compare bolts (screws) of differing diameters here. Thirdly, "AliExpress" is not a supplier, it is a marketplace.
Use pounds, be a real American! LOL!
Look on Earth, pounds and kg ARE standard units!!
As an Engineer, I could not give a hoot about the units, because we (us engineers) all know the difference between weight and mass - as that was day one physics.
The purpose of parts on space shuttles is to remain light.
Buran is my favorite spacecraft of all, please sell me a bolt, how can I get one?
I would have lost a bet on the shear test.
Someone who judges a product solely based on its manufacturing origin might be considered prejudiced, biased, or culturally Insensitive.
I didn't expect a test in situation mounted as it would be used super cool :) please remember ali items are sold at a loss by the sellers, it's the CCP subsidies and us paying them in hidden ways, only learned it recently but when they offer free shipping it's actually our tax dollars that pay it >< because of political shenanigans China is considered an under-developed country and so it's out post and our money that pay the shipping >
I’m guessing the intention was to show how bad the AE bolt was and it didn’t play out that way.
Somun olan test yanlıştır. Somunsuz çekme koparma olmalıdır plaka kesit şeklinde ..Ayrıca makine çekme ve delme hız değerleri de sunulmaldır .. bu değerler sadece genel bir fikir verebilir ..
Hi, you do not pay enough attention to very important details due this tests. If the bolt is not fitted tightly as this Russian bolt you elongate a bolt in the same time when you try to make share stress perpendicular to it (a case with Alli express bolt). Bolt cannot change en angle when mounted to steel slabs.This is causing that part of the force working along the bolt making looks it much stronger. I assuming that the whole diameter was slightly to big for Ali express bolt. You can see an angle between a head of the bolt and the slab develops during a test visible by naked aye so at lest 1-2 degrees.
I’ll stick with the Class 12.9 bolts on my car wheels.
Just what kind of metal is in that Aliexpress titanium?
Pretty much every aliexpress titanium bolt/screw I have ever bought for my bicycles has been listed as 6AL/4V, TC4 or GR5 (all the same thing) so perhaps it's safe to assume they are of that grade. Perhaps?
in the first test the bolts were the same thickness. in the 2nd test some bolts were thicker than those from aliexpress. Not a fair fight. Aliexpress was thinner than the 2 other bolts. He had to get bigger bolts to overcome Aliexpress an 8.8mm bolt against a 12.5mm is not fair. I say Aliexpress won.
Ouch... shear stress in threaded bolts....
I thought Grade 8.8 is a grade of high tensile steel, not titanium...
Bruh wha- not only that the china bolt looks cool is also strong i though it was gonna break easly💀
you do understand that this is not a controlled test by any means the design of the screws are way different than each other not to mention that there is probably Gauge difference between the screws in your test. and this was fun and all but it would have been cooler if you mentioned these sort of stuff although it probably would have taken out the fun of seeing David beating the goliath out of this video although David is probably thicker and have a different design and mixture from the goliath.
It's comes down to temperatures
I have some new hardware installed too..in my lower back..also grade A titanium
the first test is a different size for ali express
Without the same setup on each your data is flawed. One bolt has washers stacked, the next one doesn't. None of the tightening torques are measured. (that's a big one, the torque on the sheer face of the two sliding plates needs to be exactly the same). Bolt diameters' are all different. Not a very scientific test... but very entertaining, thanks.
My next submarine will be bolted with AliExpress parts.
The fact the bolt is a flathead should give you an idea of the quality.
EXACTLY! Finally, someone who sees the obvious. If it has a flathead... that doesn't even qualify as a bolt! It is just a screw. There is a huge difference between a bolt, and a screw. Thank you, for pointing people straight.
You should test the bushings congress asked why the government is paying 90k a bag for for aircraft
We been getting ripped off with $900 toilet seats!
Doesn't heat play a big part in this? The idea of using titanium is that is has a much higher heat tolerance. This test doesn't make sense.
By rights the bolt from space should have been the strongest. A little off size, as the vacuum of space would evacuate all the air between the molecules of bolts. Cold welding. Did you notice any interesting coatings on the shuttle bolts. NASA found that when an object goes to space, parts fuse together, as if welded, sure to no air cushion between them. Is is said that great amounts of money and time are spend treating parts in preparation for space travel, so the parts do not fuse and seize together.
What the F are you talking about?? There is no "air" between the molecules of the bolts!! Learn the difference between a "solid" and a "gas".
As an engineer, I worked on Space Shuttle, and I can assure you that any bullshit "cold welding" stories that you may have heard is just that - BS.
PARTS DO NOT FUSE TOGETHER IN A VACUUM!! THAT IS RIDICULOUS AND GOES AGAINST ALL SCIENCE AND PHYSICS!
6:50 Bedrock bolt
High tension bolt is best