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As the lead mechanical design engineer for a large tech company, this video gets me GOING. On the machine screw level I can tell threads by eye. What amazing history lead to what I use. I can take surface to edge angle / distance, plane to plane measurements and validate fasteners for use with a couple clicks using CAD. What a time to be alive :)

7:55 Cast iron has a higher carbon content than steel so it isn't really "low carbon"

More precise title: The history of cutting

Scripts and general lessons on this channel seem alright, but visuals are often so far off from the context, they detract from what you're trying to teach and sometimes directly feed into stereotypes and myths. Wrong timeframes, (often off by hundreds of thousands of years,) and hilariously wrong artifacts/archeological sites make what you're saying downright confusing. Make a podcast, or get a research and continuity intern to actually put relevant visuals to your script, please. you have the following to teach real stuff, don't just cram the video aspect of things full of the first pictures and videos you find from a google search.

a must watch for all materials and mechincal engineering students

Great video!! Earned my subscription

At work, we use solid diamond knives to prepare amd collect resin sections with repeatable thickness of tens of nanometres. But it looks way less cool than it sounds.

This video started strong with the history of cutting. Then it turned into content fill.

The topic of the video is something that you would never really think the history about, but it’s actually quite in-depth

Aliens will visit mars, find cut off zip ties and automatically assume electricians were there before they were

Based on thumb nail i thought we were talking about cutting our wrists. Never watched this channel but i subbed👍

You got the emphasis on the wrong syllable... The 'N' in CNC, "Numerical" is pronounced as nu-mer-i-kal, not noom-ra-kal. Otherwise, nice work! I enjoyed this one 👍

developed in ancient times and still used by depressed emo teens

Excellent video, I learned a lot. Just wanted to point out that the reason why the discovery of the basic Bessemer process (using alkaline minerals for refractory lining) cut costs so much. As you said it allowed for the use of phosphorous-containing iron ores in steel-making. Phosphorous is a very common contaminant in iron deposits, and thus most deposits were unavailable for exploitation because the phosphorous contaminant would have rendered the steel brittle and useless. The cost of steel dropped when we no longer had to mine phosphorous-free ore (which often also has low iron content).

I poured Grey and Ductile Iron at Sather Manufacturing in Everett Washington State for good old Jody 😅 ahww awww and I loved it. I was doing Shakeout. We clamped molds for about an hour and we tapped out. We would pour from a Ladle weighing 1000# and carrying 3000# of bright orange almost yellow molten Iron and poured the molds we just clamped. After doing 9 Heats the first poured Castings were cool enough to shake out and not warp. We put them in the next room over with a power overhead crane. I started work at 11 am and didn't get to go home until All the molds we poured we're shook out and the sand shoved in the corner of the shop to be used to make tomorrow's molds. With a Bobcat Skid Steer 😏 I had so much fun and blasting a manhole cover hanging from the chain and knock off the sand with sludge hammer's was the highlight 🙂❣️🇺🇲🖖 9:04

i kinda laughed at myself for watching this 🤣 we men are quite strange.

is this script in part written by ChatGPT ? (no hate here)

i just wonder how they figured out wayyyyy back then, that you could melt and how to melt copper

Pretty sure I saw this video years ago. Did you credit everyone you stole content from?

a better title could have been "the science and history of cutting". great vid, pretty interesting

They used their teeth before tools.😊

Well narated thank you very much

why the bass tone in the back as audio ? the video doesn't need that

the bronze age? I know him

SAAB was amazingly innovative for such a small car manufacturer. A pity it had to come to an end.

We don't want pure GDI.... go away!

Thanks for the video, unofrtunately there are so many adverts from CZcams - is there another platform we can watch this content on?

I think this cannot be achieved unless al cars can be mapped in a grid. The system has to be aware of every single car in its vicinit,as any rogue vehicles cannot be predicted. The on top of that, another system to confirm and detect other threats.

the science of metals??

Loved the video. I didn’t know what I was getting into and it has been illuminating. Thank you.

Doesn't PVD stand for plasma vapor deposition at least in the technology industry it does

Title is wrong should be called the history not the science

Wow- this is like 1/3 of my materials science 101 class, minus the math.

Sadly, the actual science of cutting was hardly touched on, the thumbnail or the things it represents is not discussed.

Finally, a video for us goths

On atomic level we break the material not cut

I haven't watched this yet, but I still haven't been explained why, cutting a brake rotor on an ammco does not produce the same finish of a the original machine? Yes I know that the ammco style system uses negative rake, but surely the finish can't be that dissimilar. Is it due to the heating and carbon disposition into the iron?

I have a gigantic 3D printed CNC i desgined, so this was fun to watch 🙃 i can cut wood, plastics, aluminum, brass, amd copper. Its really cool to see how far we have come and how fast we are moving.

Emo music intensifies.....

Ion sensing was invented by Swedish company SAAB in the early 90s where every SAAB car features the technology since the Saab 9000 T5

A bone to pick. Before the bronze age and after the stone age was the copper age. Copper actually overlaps the stone age because copper can be found naturally in it's elemental form as native metal. Further, copper can be refined from ore using stone age materials. The development of alloys necessarily had to come _after_ the development of ore refining.

Does this apply to foam manufacturing in footwear mid and outsoles?

Didn't know CNC was around in the mid-50s. Always thought it was a late-70s invention for no reason other than naivety Insane to follow the path from bone, flint, and charred wood to vapor-deposited tool inserts that cost more than my car

While this is an interesting and well produced video, the thumbnail and title are very misleading.

20 minutes about cutting, without once using the words "knife", "scissors", "axe" or "blade". This was more of a history of cutting metals, but there are a lot of other meterials that humans cut: Hair, leather, wood, plastic, fabrics, minerals... This video is misleading.

mang. uh. neez.

This video uses "man" to mean people. My daughter won't watch it. Please get with the 21st century.

This channel is amazing. They take a totally mundane topic and make it fascinating. Thank you!

Thanks for not being silly garbage like a lot of other educational channels these days

..."create cast iron, a low carbon and..." What??