steel hardening technique which is not taught in school. Make a sharp spiral TAP 

When I went to Lane Technical High School in Chicago in the 1970s, two years of shop classes were mandatory. I took wood shop, electrical shop, foundry, machine shop, and forge. I and hundreds, perhaps thousands, of other boys were able to use and make metal tools and heat treat them before we were 17.

Да... такой технике закалки не только в школе не учат (в школе вообще закалке не учат). Но даже в училищах такое не покажут: бросил деталь в воду - и все (правда, перед этим насыпал волшебной соли). Сколько я видел термистов, ни один так не делал. Опустив деталь в воду, они ее там болтают, чтобы остывала, а не паром, не проводящем тепло покрывалась. Спасибо хоть погрузил в воду вертикально, а то некоторые спецы в воду боком опускают, а потом удивляются, вроде точили прямую, а деталька изогнулась. А еще, каждая сталь калится при определенной температуре, определить температуру по цвету - нужен большой опыт Судя по манере бросания детали в воду у мастера этот опыт вряд ли присутствует в наличии. Сталь КН конечно можно калить при температуре КП но, результат непредсказуем. (для тех, кто в танке: КН - какую нашел, КП - какая получится).

Clickbait. quenching, annealing, post heat treat is basic engineering material science taught in school.

My Dad, who became a machinist, believed that a tool and die maker was the ultimate machinist's aspiration.

Its all quite simple, it is amount of carbon and in some alloys other variables that determine the properties. But iron and carbon make steel and amount of carbon equals how hard it will be. Mild steel (low carbon content) will remain mild steel no matter what you do - heat it to melting point and quench in royal jelly, it will still be useless as a cutting tool. You need the right material and correct treatment. Just a fast quench will leave most harder steels brittle...You need to do the next process... To ensure some toughness.

It is always amazing to see people with such determination! I"ve watched guys from Pakistan, Philippines, Thailand and India creating things with such minimal resources that it seemed impossible to do! Respect to all of you. Thanks for the video!

An expert in his field with his old lathe. It's nice to see, how save he can handle his machine. 🙂 Эксперт в своей области со своим старым токарным станком. Приятно видеть, как бережно он обращается со своим станком. 🙂

резал резьбу в шестиграннике , пока до тисочков донес гайка стала круглой - Гениально )))

I liked metal work lessons in school.Our teacher did teach us that a high concentration of salt water is ideal to be used for quenching steal for hardening as the the salt prevents tiny air bubbles if were present would leave tiny weak spots on the metal.

при нагреве горелкой образуется окалина.... размер инструмента уменшится.... слова технологам спсб

Attrezzatura..........e sopratutto PALLE ottagonali !!! Complimenti !

What struck me here, was chucking in the water ,and just leaving it at that angle, you will create a likely fracture line where the steel enters the water. Should be moved gently up and down... and then tempered afterwards TOO! Don't expect it to last very long fella...

Knowledge of the experience, magic hands: with these two ingredients, a man can build everything👏👏👏.

Buset, yang komen bule bule semua Om. Saya kira Anda memakai mesin bubut CNC, ternyata manual tp hasilnye luar biasa Mantaapp.. Makin sukses dan terus berkarya Om.

The circular form you used to cut the helical flutes gives you a negative rake. I believe if you cut below center you will reduce the negative angle. If you mill the flutes with a ball-end cutter below center, you can create a positive rake.

Perfect. Now make a video on 'how to sharpen an old scissor" 5:06 😂😂

I wish we could've seen the thread making in super slow mo.... That was tough to wrap my brain around. 👍🏼😁🤷🏼

Brilliant 👏 God bless you hands and mind.

Clickbait thumbnail. He never used rebar

Sir...that was amazing!!! Thank you❤🙏

You can also make "super-quench" by making brine and adding dish soap, though i cant remember how much soap to add. That makes it dissipate heat a bit faster than brine, i dont know how much though. If you know that your steel can be water hardened, you can try brine. If brine works, you can try super-quench, me thinks. But cracking or warping become an increasing risk...or guarantee...havent started yet to find out. But preheating your quench liquid can prevent thermal shock

Quem te disse que não é ensinado nas escolas ? Você faltou a essa aula de metalurgia !!! Há graus diferentes de resfriamento para têmpera. Desde ao ar parado, ar com fluxo (para aços rápidos, por exemplo), óleo parado, óleo com agitação em diversos níveis de agitação, água parada, água em agitação em diversos níveis de agitação, e salmoura parada e salmoura em agitação (o mais severo) !!!

A Mecânica é a rainha de tudo! Sou apaixonado pir Ela! Mil vidas eu tivesse mil vidas eu daria por ela!

Никогда не слышал чтоб на воду с солью калили, а уж то что он не сделал угол наклона режущих перьев это вообще атас) Такой метчИк застрянет и ничего не нарежет!

Meu irmão,vc é super inteligente, parabéns pelo trabalho,Deus abençoe sempre,❤❤🎉🎉🎉

Crappy Bait and Switch Thumbnail

Wow, that is one beautiful lathe. I've never seen a drill attachment for the compound before. Nor have I seen a lathe that could cut a spiral (thread with such a high pitch.) I am envious!

Присмотритесь, все разные метчики в видео. Присутствие обмана.

Amazing skills you have sir! The lathe is the only machine that the make duplicates of itself, with the right!❤ person!

Ухочес- где стружка от метчика самодельного?

Господи, человек, заточи инструмент!

Yo los FABRICO con los vástago de los amortiguadores de automóviles. El el templado en un viejo horno de ladrillos REFRACTARIOS. Tu trabajo está EXCELENTE. Saludos desde Argentina 🇦🇷🇦🇷🇦🇷

Parabéns pela habilidade

Я всегда думал, что инструмент для резки и обработки металла изготавливается из какой-нибудь прочной, инструментальной марки стали, а оно вон че оказывается. Взял любую арматурину и твори на здоровье.

Impressive skills being used with basic equipment and providing a good job. Also some cleaver operations which could save time, such as the flats being made while still in the lathe.

Cool work thanks 👍

Que maravilha de técnica

I expect most people are here to see how the heck you harden a piece of rebar.

Taladrina, aceite o agua para el enfriamiento de las herramientas de corte, para que el ángulo de corte les dure más, exelente tutorial, saludos cordiales desde Valencia Venezuela

Agradeço muito à você por compartilhar o conhecimento! 👍🏻

Un professionista al lavoro👏

와우, 대단합니다 👍👍👍

Yeah, saltwater hardening is a thing. Also, please sharpen your cutters more often, the uneven scratches left behind in some of those cuts hurt to look at.

Первый раз слышу что бы в школе закалку проходили😂😂

Из токарного станка сделал фрезерный и строгальный,красава

e muito interessante quem domina essa arte de construcao de ferramenta.....ate fiz cursos mas nao consegui toda essa habilidade...

مشاء الله مبدع والله يا معلم 👍👍👍

I was wondering about rake & a relief angle, but it certainly worked to thread that nut..nice job- creative using what is on hand.

The best thing about a lathe, you can make more tools that work with the lathe. What ever you can think of, is doable.

Apparently, protecting your feet was not taught in school either.

Сначало надо купить небольшой заводик со всем оборудованием,а потом зниматься закалкой.

That was brilliant keep up the good work!

Tu é bom mesmo. Baita profissional

To my knowledge, only carbon steel and high speed steel is used to make drills & Taps.

ты просто резал свой инструмент болтом, а потом хочешь, чтобы он резал гайку это то же самое, что пилить дерево деревянной пилой

Parabéns brilhante ideia de im bom torneiro

Congrat from Mexico. Great work my friend

Kuli Technique = Cool Tech 💪

Делают непонятно из чего, потом продают на алиэкспрессе. В качестве заготовки подошел бы старый советский круглый напильник. Именно старый советский, он весь из углеродистой стали (типа у11, у13), а не науглероженный по поверхности

сталь вообще то на искру проверяют, а так ничего нового, наставники раньше были хорошие и школа настоящая ... ещё бы вертикально в жидкость опускать и нормализовать чуток

Was a pleasure to watch your skills. Thank You for sharing.

Que tipo de produto e este? Que vc está utilizando pra fazer esta temperar?

Not sure what school you went to, but it certainly is taught in school here, or at least was when I was there, but water quench is a bit harsh and can cause the metal to be brittle, we prefer oil quench

Countries which fell under domination of stronger armies had the opportunity to use military surplus materials. Those men grew to be the first and most technical pillars of the freed nations. Oppression could be of some revinue, sometimes. Oppressed nations learn to fight back with acquired knowledge.

Oiga.... hem, el templado si se enseña en escuelas destinadas a eso. Digo, una escuela de abogacia claramente no va a enseñar Tratamientos Termicos. Partir de un metal base con buena templabilidad, claramente es el camino conveniente. Lo interesante seria hacerlo a partir de un acero Sae 1020 o un F24. De todos modos, excelente video. Me gusto el accesorio para hacer el dado del macho de roscar. Saludos.

This video showed the normal hardening using salt water quench. The most basic stuff, which was taught at school. Where is the "not taught in school" part?

At 6:35 you can cleanly see he stopped short and didn't cut threads all the way through. At the end of the video when he cuts the nut in half to show you the threads is not a nut at all but a cut off piece of round stocks with internal threads. More jump cuts than a Chinese tool demo o_O

There is a correlation between working with your hands and better mental health.

Muito bom excelente explicação

MUESTRAS SER UN FREGONAZO EN ESTE OFICIO Y GRACIAS POR ENSEÑAR ESTOS TRUCOS SALUDOS Y ESPERAMOS MAS

Oh wow, throwing hot metal into water. Why never thought of this anyone?

This video is helpful. Thanks 😍

Have you tried making tempering with aloe vera?

Mind blown @ using a bolt head as a cutting tool

Nice video, thanks :)

I heared about red heating tools, submerged in a melt of salt, to avoid the oxidation on the surface. On the other hand I just don't know what quenching into an solution of water and sodium chloride would possibly do !? By the way - Is there no tempering needed after quenching ?

It's nicely machined - everything good until the steel was quenched. Where was the tempering stage? The result is rock-hard yet brittle carbon steel, liable to shatter under load, or even dropped. Even sticking it in a domestic oven at 240C for an hour would have helped to impart some basic tempering and reduce the effects of that brutal quenching.

this vid definitely has tons of fake views, likes, and comments. this is a normal heat treatment with literal snake oil thrown in

Parabéns ótimo trabalho

А зачем всё это? Твердость не проверенна ни по раквелу ( брюнелю) Я понимаю что сейчас инструмент ( хороший) найти тяжело, но всё - же.

Well done. Awesome.

6:45 your hand was resting on a vise, use that instead of your hand so when the grinder kicks back it doesn't chop your fingers of, also that way the heat from the nut wont burn your hands

Some knows this music? For some reason I find it fascinating.

Здорово👏✊👍👏✊👍👏✊👍👏✊👍

Agua y sal, no lo sabía, también comento que no soy de esa rama pero está bien aprender.

A melhor máquina imperatriz inventada até hoje! Infinita opções!A Têmpera.nem se fala! Isso é realidade!!

Top esse salt é sal que chamamos aqui no Brasil?

Nice Job!

Excelente

Wait, what? What exactly was the mysterious steel hardening technique, quenching? Or quenching in brine?

Thank you 👍 hello Ukraine

Claims special knowledge about something schools fail to teach - comes to work in flip flops.... that sounds like a real winner!

Why you put a picture of building iron bar in your intro of the video.

Не знал, что на токарном можно столько операций делать с других станков

Salty water is used for low carbon steels, a ST90 is high carbon one, to be oil quenched and tempered. You're a good machinist, but need to improve in heat treatments. Before inventing a heat treatment, google the grade and read the steel specs.

Exceeded my skills at about the 2 minute mark.

The only thing you make out of rebar is more rebar.

Молодец! Вот только, можно было еще отпуск сделать в духовке 200°С часов на 10. Тогда вообще, бомба!

Very cool.

Shouldn't the tip be slightly conical? And without any relief on the threads, this tool must have very high friction.