My thoughts exactly.

Totally agree with you. when I watch these types of videos or wood turnings, I like to hear the sound of the tools and machines, not music!

The workers prefer music

@@Dankboi420 But they probably don’t care about music in videos.

No hate on classical music...

Pls believe in Jesus

I was thinking the same thing

I'm not mad about it ⛳

this is slavery. freedom peoples should not work like this. terrible env, low eff., old equipment s.

I want to buy the gut @14.22 a pair of safety shoes.

...i guess ther no shortage of workers in Korea lol..... is this North korea?.... i doubt many ppl at this factory can spell to safety...

@@Patrik6920 Spelling as in like your spelling?🤣🤣🤣

@@Patrik6920 в Северной Корее о безопасности рабочих заботятся гораздо больше.

@@user-yb5uz6tu2v ..ya its just small details of not being able do what u want, being free, choose ur own path etc...minor details... if the gov say jump - u better jump or u will end up in a factory stamping nuts for the next 25 years... ruskie on the fast track to becoming the new north korea...

that's what she said

It has to have the holes flame burnt/cut as a drilled or sawn hole will tend to start tearing far sooner.

부산 사상구 감전동에 있는곳이네요~

방문 감사드립니다.

Easier access to the surface means you can apply more force in a specific manner. Rolling external threads it is more efficient because you lose less material and can make more bolts with the same amount of stock. Truly manufacturing has become a game of stacking efficiencies.

@@Sickmonkey3 Rolling threads also is much stronger than cutting them on a lathe.

@@robertmceuen3630 I've heard that before from my old beard predecessors but I haven't come across actual data for that claim.

@@Sickmonkey3 Ha. I guess I am an old beard without the beard. Rolling the threads instead of cutting them is akin to forging. Cutting interrupts the grain of the steel. My opinion of course. Appriciate you responses. Good to see folks interested in the same as me.

Древняя технология, устаревшее оборудование, мелкие партии метиза среднего размера...

@@com97anche - согласен насчёт размера, а вот оборудование не УСТАРЕВШЕЕ, оно рабочее и соответствует выполняемой работе и требуемому качеству. Для самолетов конечно гайки не поточишь здесь...

@@victbass4792 Просмотри еще раз... Единственно что там более-менее - револьверный (с кнопочками ПУ). Вообще-то для этого в СССР стояли автоматические линии. А такие мелкие партии метиза производились на вспомогательных производствах, примерно на таких же станках - 50 ЛЕТ НАЗАД!

@@victbass4792 Это скорее всего для всяких мостов и других металлоконструкций, там не требуется очень высокая точность. насчет оборудования соласен, оно выполняет свою функцию и это нормально. А избыточная автоматизация тоже не есть хорошо, людям работать надо, а где им работать если 99% работы будет делать автоматика ? Да и слишком дорого будет стоить такая автоматика.

@@victbass4792 Паровоз тоже выполняет свою работу. И "Запорожец" едет...

The music at the 7 minute mark is Still Life by Adrian Berenguer

Thank you for the many likes 😀.

16:12 Yeah, that copper hammer was interesting. I wonder what the purpose is for? Perhaps not to mar the steel as I suspect copper being softer? Softer and less impact on the human using it? No spark? Interesting.

I was wondering too. But after seeing the next step, I realized what he was doing. He is setting a centering point on the other end of the bolt, to center the bolt in the lathe.

@@frischerfisch2528 Hi. Oh, I understand the center point for the lathe. I was just curious why use a copper hammer instead of a steel hammer. That's all.

@@huyked Copper hammers are commonly used when a non-marking hammer is required but hide or plastic isn't heavy enough.

Most of that equipment was probably sold off from American factories 50 years ago and shipped abroad.

So from a steel mill (with a rolling mill) you can get bar stock, billets, rod (like this), sheet, plate and rebar. With those, you can make thousands of things. They just don’t make enough of these to put the factory near the steel mill to have hot rod ready, and it’s not efficient for this factory to make their own rods.

yes right. sometimes they are not thread properly. when I need one I always buy two!

What country is making the low quality product?

@@teebosaurusyou, I don't know where exactly. We're talking ACE Hardware and Home Depot, so my guess would be China.

@@jakeharris9075 There's a lot more to this than meets the eye. The metallurgical properties are very important to making nuts and bolts that can meet the specifications for strength. There is a big difference between "melted steel" and steel formed when it is red hot. In a rod mill, they start with molten steel cast into billets. Typically these are square shapes formed anywhere from about 6 inch square to somewhat larger or smaller. But these are cast, and formed directly from molten steel. The billets then get reheated to red hot and are "rolled", meaning that they are stretched, elongated and compressed under shaping rollers using high pressures. The rolling process is key because it aligns the molecules within the steel, which greatly improves the overall strength. This is a continuous process and a 20 foot by 6" billet will be squeezed down to form the round bar you see in the video. As the billet gets squeezed down and shaped it becomes longer, so at the final stages, that round rod is flying through the machinery at high speed, while the billet may still be in its original shape and moving much more slowly. It's pretty amazing to watch this red hot "spaghetti" zooming along a long roller track. In some cases that rod may be coiled up, but in this size they are usually sawed off to length as they are moving down the line. Once in this rod shape, they are often heat treated to adjust the hardness and other properties. Also very critical is the exact formulation of the molten steel with different alloys. Very small fractional percentages of various metal alloys will make a huge difference in the metallurgical properties. (Steel is not a generic material) As the rods are cut into slugs, reheated and forged into the basic shape, the temperatures and amount of displacement in the forge, are all important variables that add up to the final metallurgical properties. As the threads are cut, a form of "cold forming" takes place, which also contributes to the final properties. The process itself is highly engineered to achieve the final desired properties that meet the specifications. Again, much more going on here than meets the eye. You can make nut that look just like this, but I wouldn't trust them on a big structure. You can find videos of Indian, Pakistani and other countries described as "How nuts are made", but they look nothing like the process you see here. Typically, they are some little "mom and pop" shop using chucks of rebar or junk steel. They heat it up in a very much uncontrolled fashion and then get handed to the next guy who stamps it in a big hammer forge. Then they cut the threads by hand. The trouble is that side by side, you probably can't see any difference. But one is a real, high specification nut and the other is a piece of shit!! 4 or 5 guys working in one of these little shops can probably make several hundred or more nuts in a day. But if you want to buy the high grade 2" nut produced in this video, you'll pay around $30 each. Those 4 or 5 guys combined don't even make $30 together for a long day's labor. And their processing costs are some gas to fire their small reheat furnace, some scrap steel and some 100 year old forge they bought at scrap prices. So I think you get the picture. The little shop probably makes a nut for 50 cents, maybe a dollar, but passing it off as the real thing has a huge profit margin. If you are doing some little shelving project using 1/4 -20, grade 2 bolts, you probably wouldn't know the difference. But imagine putting a bridge or building together with this cheap shit!!! And in big lots, there are millions of dollars to be made selling the low quality, counterfeit fasteners. It's a serious problem. Ironically, in their home countries, they use this cheap, sub-standard shit every day. We really shouldn't allow these third world countries to even participate in this market. But because of the money involved, somebody would find a way to cheat the system. With many large contracts today, the contractor may be assigned to supply the fasteners and some dumb ass bean counters who are supposed to watch it, may never catch it. Well engineered projects must have measures in place to ensure the quality of the materials meet the specifications. So, in answer to your question, you don't want to shortcut the processes involved without fully understanding the implications. That is essentially what these third world shops do. The Koreans, (South), have some excellent engineers and large industrial processes. Most of what they learned and the technologies they use, came from Japan. Koreans are very good at steelmaking and have good quality control. But they have some people in business who are no beyond looking for easy profits. Not so long ago, some Chinese steelmakers were shipping cheap Chinese steel to Korea to essentially be rebranded, as a way to get around tariffs on some steel products. I have little doubt that some very large steel consumers may have been involved in the ruse or at a minimum. looked the other way. Steel can be pretty forgiving and it's an inherently very strong material. But certain applications rely on the engineered material properties being what they are supposed to be. Years ago, many things were overbuilt to a large degree. That made sense when the materials used were not precisely made. But in modern times, designs take advantage of the very specific material science and the properties associated with them. The very high performing materials need to be made to exacting specifications. But by using these, the total amount of material can be much less. Lots of advantages to using less of very high performing materials. But the materials need to meet the specs or the design may be compromised. Critical structures are still over engineered, but to a much lesser degree than they once were. Modern engineering tries to build redundancy into designs and avoid single point failures. But assemble a bridge or building with substandard fasteners and you can create multiple failure points that may well go unnoticed.

Yes but using 1/2 tar barrels to lift such weight without any strengthners where the lifting holes are is mad. I see one such barrell which had torn thru and still in use with new holes, Also the guys moving the cranes about are walking over obsticles as they work. Really safety needs to be improved a bit. A tidy of the floor, Proper containers not tar barrels, and I see one person walking on top of rounded steel at height. It wouldnt cost an aufuff lot to make the workplace a whole pile safer, while still using the same procedures.... Just safer

@@nialldaly7108 i see your point but theirs something else to it, my guess is that method is more convenient?

It just goes to show that the rest of the world knows how to work safely "without" all that safety gear as the North American dummies do lol

@@realemonful a lot of money is made in keeping people “safe”

@@realemonful my time in Korea says that the chaebols don't really give a shit about safety and accidents do happen to these men and they are basically maimed for life... I literally watched a man lose his left leg from the knee down in front of me when a stock rack finally cracked out.

Have you ever seen the back of a twenty dollar bill?

Being an ex safety officer in the modern world this plant would be shut down , there are hundreds of safety breaches .

Yeah, it also wondered me that they still use a manual lathe instead of a more faster cnc machine

Really? Genius.

The machine shop I worked at had us use a go/no go gauge when we would tap or thread anything. We will go get a new tap or die when the go gauge would work. Judging by some of those having missing teeth I would say they don't change them too often but who knows you may not show every step of the way in this video

I used to sell taps. Something that big (over 1" in diameter) would get dull after doing hundreds of parts, maybe one thousand. However, the taps can be resharpened. This is old technology. These days maufacturers use CNC machines and carbide thread mills of roll taps (cold forming).

@@erinbrew9675 why do they even run their taps so slow? Would they get dull so much faster when you run them faster?

@@erinbrew9675 i didnt know that. thanks

@@laurareiser9552 high speed steel must be run at much slower RPM's than carbide. Yes, if you ran them faster, they would burn the cutting edge. The surface feet per minute is constant and just looks skower on larger taps.

Rolling threads was also shown.

The bolt threads were rolled, which is a forging process that makes much stronger threads. The nuts were "machined," or cut threads either via a tap or with the lathe. Same process of cutting away the valleys though.

Probably a mild a36

There are different grades of steel for different grades of bolts. We used A36 bolts and "high strength" A490 bolts. "Allen head" bolts are some kind of high strength steel better than A36. I think grade 5 bolts are A36, while grade 8 are higher tensile strength steel.

Do you still in Bolt N Nut field , Our factory professional in Bolt and Nut more than 20 years in HanYan China , Is any chance we supplier to you ? Thank you