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 😅

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😂

Yeah i thought the same 😅

Not to mention all the washers with huge inner diameter at 1:50 ,entertaining to watch, though.

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

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.

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.

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.

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 😂

HPC is the best , for me , from Finland .

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

That's sad dude. Not even any bacon..... I'm telling you a sausage Mcmuffin with bacon added is worth the heart problems.

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.

Thanks for reminding everyone how much spelling counts

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

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

1998-2002 if I’m not mistaken

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

are you china?

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 😂

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.

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?

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.

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!