I so love your writing. You may not remember me but, I'm the guy who quote your writing in your episode, _Pulling Energy Out of Thin Air_ _Without a difference in thermal states from which to establish a flow of energy ..._ _No mechanical work can be extracted from the system. (talk about elegant writing)_ Or ... the full snippet: The 1st law of Thermodynamics dictates: Entropy of an isolated system, left to evolve naturally, can never decrease ... and will always arrive at a state of thermodynamic equilibrium in which, entropy reaches its maxim. Without a difference in thermal states from which to establish a flow of energy, no mechanical work can be extracted from the system. In effect, as entropy increases, the amount of energy that can be extracted decreases. This inherent natural progression of entropy towards Thermal-Equilibrium ... directly contradicts the behavior of all perpetual-motion-machines of the second kind. SUCH beautiful writing; even hearing the second time is still stunning. I hope people don't confuse this extraordinary level of clarity nor the simplicity with which he reduces these complex concepts ... for being "easy." Those who do have really missed out on the joys of edification. But something tells me, those who've found this true gem of youtube ... know, this simply is not the quality of language heard in one's daily life.
Not meant to dis Brilliant in any way being the proud sponsor of this, as well as many of your wonderful videos... but it might have been a humoring twist to have "Henson Shaving", or those Chinese made *"Japanese Kitchen Knives"* promos for this one.
3:00 “…..superior to ANY stone blades”…….. hmmmm. Interesting and yet obsidian surgical blade/knives; a so called “stone age technology”still finds a place amongst present day surgeons.
I was kind of hoping this video was going to be more focused on the actual, physical act of cutting materials - rather than the tools that do the action.
Agreed. Short version - all materials deform plasticly under enough pressure. The reason that a sharp tool cuts is because it is applying all the cutting force in a smaller area, so the pressure is higher. It’s the same reason rocks flow like stiff putty in plate tectonics. Deep down they’re no longer hard / brittle.
Science and history go hand in hand. If the two being interlinked wasn’t deemed important, we would not be bothering with associating scientific principles, math, or technology with people, civilizations, and eras.
What I expected when i clicked the video titled "The Science of Cutting": the Science of Cutting. Like Mohs scale, tool hardening, shear forces and other factors involved in cutting I'm not even aware of. What i did not expected: Brief history of metallurgy and machine tools development Was i disappointed? Hell no. I still learned a ton of details in the areas I thought I had descent familiarity with.
Same expectation, different reaction. Didn’t get the science of cutting so I skipped and skipped, until I realised the whole thing was a history lesson.
agreed. due to the thumbnail, i expected something more along the lines of butchering meat, cutting, trimming.. not that i mind the history lesson...albeit brief, was just not what i was expecting.
Almost all other videos of new mind are super specific, with tons of new information. I was indeed a little bit dissapointed. It´s still one of the better engineering channels here on youtube. Keep up the good worl!
Sharp sticks. See if you fire harden the point, a smart human can make pointy sticks that can take on bears/lions/etc. A group of people with pointy sticks to protect themselves will be safe from those predators. Or if people want to, then can become the top predator!
This is a new one on me ! You can actually make the point of a stick harder with fire ? Does it give up any sharpness ? A harder tip might be worth a little trade off ?
My grandfather was a toolroom machinist in a paper mill, my dad had started as a machinist in the Navy and went on to design paper bag machinery. I once found a small sculpture of an eagle that my cousin had made. At dinner one night I (probably around ten at the time) marveled at how he had carved that eagle out of aluminum with an X-Acto knife; until then I had no idea that cutting something as hard as metal was possible. My dad responded, "What do you think we do all day?" Years later I came up with the snappy reply, "How would I know? You never talk about it." I guess this story has more to do with family dynamics than cutting technology. I went on to become a machinist and tooling designer myself, BTW.
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 :)
Fortunately, I lived through these changes. Truly incredible progress has been made with the entry of computer technology into this profession. I started CNC programming on a small EMCO cutting machine. Today, knowledge of PLC codes is not required in many places. We sharpened the tools while holding them in our hands, now machines do this for us as well. I'm programming sharpening machines like this now. :) :)
613k subscribers, and sponsored. Not sure about underrated lol. Either way it's good introduction to the basics of material properties in regards to cutting. Good stuff
one of the things that solidified how cutting metals worked for me was using a cold cut saw (not the meat) which had a carbide toothed blade about a quarter inch thick. it spun slow with coolant and was a beast of a machine. It was loud as hell too, so I didn't want to go too rough on it but my boss said I was wasting money not being aggressive with the saw since technically it's taking less cuts and wears the teeth out less.
10 of of 10 presentation. Teaching and the history of sharp strong cutting tools. As a ex-Butcher the knife blade edge was very important.,if the blade edge was to sharp eg 11 degrees the knife would become blunt very quickly,if the edge was 25 degrees or more it would make for hard work boning and cutting. Between 20-22 degrees was just right. We were told at college that you never cut yourself with a sharp knife.the blade cuts and flows in the direction you are cutting but a blunt knife has to be forced and can result in changing direction with potential to cut you.growing up in the trade a man at a butcher shop near me was boning a beef chuck and the knife slipped and went straight into his thigh,he died right there were he was working.😢 Thank you 👍🏼 Australia
I teach engineering students in a machine shop. You have just added content to my mill and lathe classes. You WILL be credited and I will steer students to this video for a deeper dive. Well done.
11:32 "...could cut a 1m bore to an accuracy of 1.5..." my machinist brain thinks 1.5 thousands of an inch? 1.5 microns??? "...millimeters." Actually lol'd at that. Its crazy how quickly our machine tools advanced in accuracy and precision
Would love to see a more in-depth history of the beginnings of metallurgy. Most certanly wasn't there one person who on day said "let's build a furnace, mix copper and zinc and create bronze". How did people come up with melting stones, so metal would come out of them? How did they discover the different properties of different metals and how did they manage to mix (alloy) them so they'd enhance each other properties thousands of years before chemistry became an actual science with methodical proceses?
Thank you so much for all your hard work making this video. Truly high quality content. 15 years ago the only place to learn anything like this was at university. Just amazing what I am able to learn in the comfort of my own house.
I have been watching your channel since the science of roundness and I always forget exactly how good your videos can be! lmao. When I clicked on this I did not expect an overview of this depth of the topics covered in both my materials and manufacturing classes in uni. Have you tried targeting the struggling mech E students yet?? A ton of students use youtube for help with course work/material and I do wonder how you would approach a video dedicated to material in a college level course. (like heat transfer or applied thermo). Love these vids! This, flatness, roundness, of course the more ME focused vids have been my favorite so far.
I learned a few things! Great YT vid. One thing I have to say is that for the last 40 years people have said that the U.S. doesn't manufacture anything. We make the finest, and most expensive machine tools known to man. They ain't cheap. China sends more material and goods to us, by volume/mass. We send the most advanced and best equipment the other way. By cost/value? We export more than we import. Same with India/Egypt/Brazil... what have you.
The machine that makes a machine tool different from any other is the use of the screw to precisely control the application of the cutting edge to the work. It's really that and not the application of power. A power tool isn't necessarily a machine tool. A machine tool can be human powered and still be a machine tool. If you have to turn a wheel to make a cut happen, it's a machine tool. If you have to push to directly move an edge to make a cut happen, it isn't. It's that the cut is constrained, guided by a way, and fed by a screw or lever (which themselves are basic machines) which makes a machine tool such. A woodworking lathe where you apply a chisel you hold in your hand to a spinning workpiece isn't a machine tool, but it is a power tool. An electric drill you aim by hand also isn't a machine tool, neither is a router you aim and move about by hand. A screw cutting lathe is, a mill is, even a pedestal drill is (although barely, because it has a quill you lower by turning a wheel). CNC machines of course all must be, but so too must the 'power feed' axies which a mill or lathe might have. But it seems too often people equate 'machine' with 'has power from other than a human', and it just isn't so. A lever is a machine, so is a ramp or wedge, and the latter wrapped around a rod makes a screw thread, which is really just a fancy inclined plane which allows rotation to make controlled linear motion along the rod. That being used to change the position of a cutting tool, whilst another axis spins it, is what a screw-turning (metalworking) lathe is. It's not the spinning-ness of the work - it's the controlled positioning of the cutting edge.
- 00:00 🧠 Cutting tools are fundamental to human progress, enabling the transformation of raw materials. - 00:40 🪓 Early humans used stone tools like choppers for cutting meat and creating advanced tools. - 01:16 🔪 Cutting involves applying a directed force, requiring the tool to be harder than the material. - 02:10 🛠 The transition from the Stone Age to the Bronze Age brought the use of metal tools, starting with copper. - 03:06 🧬 Metallurgy emerged in the Bronze Age, allowing for the creation of alloys and manipulation of metal properties. - 05:00 ⚒ Bloomery furnaces allowed the processing of iron, leading to the development of wrought iron. - 07:09 🔥 The blast furnace further advanced iron processing, leading to large-scale production of pig iron. - 09:04 ⚙ The Bessemer process revolutionized steel production by efficiently reducing carbon content in iron. - 11:00 🏭 Machine tools evolved from simple hand tools to complex machines, enhancing precision and efficiency. - 13:28 🖥 CNC (computer numerical control) machines automated production, achieving high precision and repeatability. - 14:39 🔧 High-speed steels, introduced in 1910, withstood higher temperatures and cutting speeds, advancing tool performance.
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.
I almost got killed by a lathe once. Even if it’s -40 degrees Celsius outside, and the shop you’re working in is an old miner’s barracks with holes in the walls so it’s around -10 in the shop… never let down your sleeves.
it is improper to say cutting shear force. any cutting has to start with high crushing stress otherwise the sharpness of the tool becomes unimportant. if only shear stress is important to cut, one can cut with blunt tool (other edge than sharp edge).
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.
i was going to watch this but autoplay said: history guy - the history of superglue. the videos make a good doublet, especially considering their introductions. 😊
Some animals have various cutting capabilities, and animals even use tools. But what differentiates human from other animals is our ability to use stared energy. Stored energy, such as fuels for burning like wood and oil helped keep us warm, cooking food (making it more edible), and do metal work.
Whoever was experimenting with alloys and decided to risk using rare aluminum to make aluminum bronze was super lucky because that's almost as good as steel in a lot of properties , plus gold look would be popular too, I bet.
MISLEADING TITLE. Hey Bruno, if the title your video is "The Science Of Cutting", you talk about the science of cutting, NOT about some other subject like the history of metallurgy or cutting tools or whatever. MISLEADING TITLE.
the weird thing about machining is removing huge amounts of material but layer by layer while water jet, plasma, edm can cut big chunks very precisely in one go. machining is still useful to make concave shapes, but if you can make the convex shaoe that's rhe closest to you final part and only then machine the concave part, it siund like you can save lot ot time, znergy and wear on the tools ? 3d printing/additive technologies are very interesting but I dont think its anywhere ready for mass prooduction of parts, neither in terms of quality, precision or speed.the only exception is when the more complex shapes allowed by additive technologies enable new features. I have 3d printed soles in a pair of addidas, I like the looks but I wouldt say it makes such a big difference each technique having its advantages, I think not a dingle one is going to disappear soon but by combining them manufacturing is going to keep improving. where 3d printing take things ro the next level is 3d printing things on site that cant be moved easilyy like 3d printing houses or sending a self replicating 3d printer on another planet to start naking the building blocks for a civilization
Fascinating! Just imagine the new metals and materials we'll see once we begin to mine asteroids. Pity I won't be around to see it, but our kids and grandkids very likely will.
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 👍
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’ve found my calling. I’ve been feeling like looking into a trade such as plumbing or electrical work and since 2017 I’ve been working in the restaurant industry numerous positions but after coming across this video it reminded me Metal working is in my blood 🩸 my last name is Ferraro meaning blacksmith in Italian. My grandfather worked on airplanes and was a mechanic for General Motors and my father was a hippie
I was expecting this video to teach me the secrets of cutting kitchen ingredients with a knife like the pros do. Please change the preview image because it’s very misleading.
▶ Visit brilliant.org/NewMind to get a 30-day free trial + 20% off your annual subscription
I so love your writing. You may not remember me but, I'm the guy who quote your writing in your episode, _Pulling Energy Out of Thin Air_
_Without a difference in thermal states from which to establish a flow of energy ..._
_No mechanical work can be extracted from the system. (talk about elegant writing)_
Or ... the full snippet:
The 1st law of Thermodynamics dictates: Entropy of an isolated system, left to evolve naturally, can never decrease ... and will always arrive at a state of thermodynamic equilibrium in which, entropy reaches its maxim. Without a difference in thermal states from which to establish a flow of energy, no mechanical work can be extracted from the system. In effect, as entropy increases, the amount of energy that can be extracted decreases. This inherent natural progression of entropy towards Thermal-Equilibrium ... directly contradicts the behavior of all perpetual-motion-machines of the second kind.
SUCH beautiful writing; even hearing the second time is still stunning. I hope people don't confuse this extraordinary level of clarity nor the simplicity with which he reduces these complex concepts ... for being "easy." Those who do have really missed out on the joys of edification. But something tells me, those who've found this true gem of youtube ... know, this simply is not the quality of language heard in one's daily life.
Not meant to dis Brilliant in any way being the proud sponsor of this, as well as many of your wonderful videos... but it might have been a humoring twist to have "Henson Shaving", or those Chinese made *"Japanese Kitchen Knives"* promos for this one.
3:00 “…..superior to ANY stone blades”…….. hmmmm. Interesting and yet obsidian surgical blade/knives; a so called “stone age technology”still finds a place amongst present day surgeons.
Tanum carbide. I wonder of thats a tantalum alloy.
No
I was kind of hoping this video was going to be more focused on the actual, physical act of cutting materials - rather than the tools that do the action.
Agreed.
Short version - all materials deform plasticly under enough pressure. The reason that a sharp tool cuts is because it is applying all the cutting force in a smaller area, so the pressure is higher.
It’s the same reason rocks flow like stiff putty in plate tectonics. Deep down they’re no longer hard / brittle.
I was thinking the same thing. It seems they got caught up on the metals and making of alloys more than the title suggests.
misleading title, should be "The history of cutting tools"
Agreed. But it's such a good video.
Sigh, no science noted.
Science and history go hand in hand. If the two being interlinked wasn’t deemed important, we would not be bothering with associating scientific principles, math, or technology with people, civilizations, and eras.
@@patrickguyumagree, 99.99% of science is historical
1:13 - 2:09
What I expected when i clicked the video titled "The Science of Cutting": the Science of Cutting. Like Mohs scale, tool hardening, shear forces and other factors involved in cutting I'm not even aware of.
What i did not expected: Brief history of metallurgy and machine tools development
Was i disappointed? Hell no. I still learned a ton of details in the areas I thought I had descent familiarity with.
Same expectation, different reaction. Didn’t get the science of cutting so I skipped and skipped, until I realised the whole thing was a history lesson.
agreed. due to the thumbnail, i expected something more along the lines of butchering meat, cutting, trimming.. not that i mind the history lesson...albeit brief, was just not what i was expecting.
Almost all other videos of new mind are super specific, with tons of new information. I was indeed a little bit dissapointed. It´s still one of the better engineering channels here on youtube. Keep up the good worl!
Me too.
Yeah was hoping for science not history. It was still interesting and enjoyable.
Sharp rocks are probably our #3 all time invention.
#1 being heavy rocks for hitting things and #2 being fire.
Sharp sticks. See if you fire harden the point, a smart human can make pointy sticks that can take on bears/lions/etc. A group of people with pointy sticks to protect themselves will be safe from those predators. Or if people want to, then can become the top predator!
This is a new one on me ! You can actually make the point of a stick harder with fire ? Does it give up any sharpness ? A harder tip might be worth a little trade off ?
What about the wheel?
I thimk the wheel needs a place
no wheel or string??
My grandfather was a toolroom machinist in a paper mill, my dad had started as a machinist in the Navy and went on to design paper bag machinery. I once found a small sculpture of an eagle that my cousin had made. At dinner one night I (probably around ten at the time) marveled at how he had carved that eagle out of aluminum with an X-Acto knife; until then I had no idea that cutting something as hard as metal was possible. My dad responded, "What do you think we do all day?" Years later I came up with the snappy reply, "How would I know? You never talk about it." I guess this story has more to do with family dynamics than cutting technology. I went on to become a machinist and tooling designer myself, BTW.
You can't cut aluminum with an exacto knife so what do you mean?
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 :)
Fortunately, I lived through these changes. Truly incredible progress has been made with the entry of computer technology into this profession. I started CNC programming on a small EMCO cutting machine. Today, knowledge of PLC codes is not required in many places.
We sharpened the tools while holding them in our hands, now machines do this for us as well. I'm programming sharpening machines like this now. :) :)
The Bessemer process was invented (and first used) in my city!! :D (Sheffield, UK)
Stainless was also invented here :)
as well as Crucible steel!
Spot on. Lets get the history right.
Yet another great video by one of the most underrated science channels on RUclips. Thank you!
Watched at 5x speed, eh?
613k subscribers, and sponsored. Not sure about underrated lol. Either way it's good introduction to the basics of material properties in regards to cutting. Good stuff
one of the things that solidified how cutting metals worked for me was using a cold cut saw (not the meat) which had a carbide toothed blade about a quarter inch thick. it spun slow with coolant and was a beast of a machine. It was loud as hell too, so I didn't want to go too rough on it but my boss said I was wasting money not being aggressive with the saw since technically it's taking less cuts and wears the teeth out less.
As a guy that's carried a pocket knife every single day for the last 25 years & owns probably 30 of them.. this is incredibly interesting.
10 of of 10 presentation.
Teaching and the history of sharp strong cutting tools.
As a ex-Butcher the knife blade edge was very important.,if the blade edge was to sharp
eg 11 degrees the knife would become blunt very quickly,if the edge was 25 degrees or more it would make for hard work boning and cutting. Between 20-22 degrees was just right.
We were told at college that you never cut yourself with a sharp knife.the blade cuts and flows in the direction you are cutting but a blunt knife has to be forced and can result in changing direction with potential to cut you.growing up in the trade a man at a butcher shop near me was boning a beef chuck and the knife slipped and went straight into his thigh,he died right there were he was working.😢
Thank you 👍🏼
Australia
I teach engineering students in a machine shop. You have just added content to my mill and lathe classes. You WILL be credited and I will steer students to this video for a deeper dive. Well done.
The Legend has blessed us with another Episode!
You kind of skipped over cam drive, relay control, and pantograph in the lead up to CNC, though it's only tangential to the main topic.
As a general machinist myself, i love seeing these deep dives into the history and processes of industry.
Toolmaker & CNC programmer here for pharmaceutical and aerospace companies. This was an awesome watch thank you!
11:32 "...could cut a 1m bore to an accuracy of 1.5..." my machinist brain thinks 1.5 thousands of an inch? 1.5 microns??? "...millimeters." Actually lol'd at that. Its crazy how quickly our machine tools advanced in accuracy and precision
An episode describing how a knotter works on a hay baler would be super interesting.
Would love to see a more in-depth history of the beginnings of metallurgy. Most certanly wasn't there one person who on day said "let's build a furnace, mix copper and zinc and create bronze". How did people come up with melting stones, so metal would come out of them? How did they discover the different properties of different metals and how did they manage to mix (alloy) them so they'd enhance each other properties thousands of years before chemistry became an actual science with methodical proceses?
Worth an entire college semester.
Which college did you attend ?
@@SuperYellowsubmarin Engineering Mechanic
Great video, very informative but the title is very misleading, half the video was metallurgical history
Re-upload?
Cast Iron is Iron with a Carbon content between 2.06-6.8% Carbon (but only really usable until 5% Carbon)
Thanks for the video, unofrtunately there are so many adverts from RUclips - is there another platform we can watch this content on?
Thank you so much for all your hard work making this video. Truly high quality content. 15 years ago the only place to learn anything like this was at university. Just amazing what I am able to learn in the comfort of my own house.
I have been watching your channel since the science of roundness and I always forget exactly how good your videos can be! lmao. When I clicked on this I did not expect an overview of this depth of the topics covered in both my materials and manufacturing classes in uni. Have you tried targeting the struggling mech E students yet?? A ton of students use youtube for help with course work/material and I do wonder how you would approach a video dedicated to material in a college level course. (like heat transfer or applied thermo).
Love these vids! This, flatness, roundness, of course the more ME focused vids have been my favorite so far.
I learned a few things! Great YT vid. One thing I have to say is that for the last 40 years people have said that the U.S. doesn't manufacture anything. We make the finest, and most expensive machine tools known to man. They ain't cheap. China sends more material and goods to us, by volume/mass. We send the most advanced and best equipment the other way. By cost/value? We export more than we import. Same with India/Egypt/Brazil... what have you.
This channel is amazing. They take a totally mundane topic and make it fascinating. Thank you!
The Metal Age not just gave human sharp formed object but sharpen the mind of human which evolve into extreme mind [idealism].
Love how these usually start at the EARLIEST possible use of this tech
As a woodworker I found this really interesting. Great video
The 1st notable Metal Turning lathe with toolpost and prismatic ways, was designed and built by Jacques Vaucanson, 1751.
The machine that makes a machine tool different from any other is the use of the screw to precisely control the application of the cutting edge to the work. It's really that and not the application of power. A power tool isn't necessarily a machine tool.
A machine tool can be human powered and still be a machine tool. If you have to turn a wheel to make a cut happen, it's a machine tool. If you have to push to directly move an edge to make a cut happen, it isn't.
It's that the cut is constrained, guided by a way, and fed by a screw or lever (which themselves are basic machines) which makes a machine tool such.
A woodworking lathe where you apply a chisel you hold in your hand to a spinning workpiece isn't a machine tool, but it is a power tool. An electric drill you aim by hand also isn't a machine tool, neither is a router you aim and move about by hand.
A screw cutting lathe is, a mill is, even a pedestal drill is (although barely, because it has a quill you lower by turning a wheel). CNC machines of course all must be, but so too must the 'power feed' axies which a mill or lathe might have.
But it seems too often people equate 'machine' with 'has power from other than a human', and it just isn't so. A lever is a machine, so is a ramp or wedge, and the latter wrapped around a rod makes a screw thread, which is really just a fancy inclined plane which allows rotation to make controlled linear motion along the rod. That being used to change the position of a cutting tool, whilst another axis spins it, is what a screw-turning (metalworking) lathe is. It's not the spinning-ness of the work - it's the controlled positioning of the cutting edge.
This is cutting edge technology
Thank you for saving the AD until the end 👍🏻👌 you just got my sub.
- 00:00 🧠 Cutting tools are fundamental to human progress, enabling the transformation of raw materials.
- 00:40 🪓 Early humans used stone tools like choppers for cutting meat and creating advanced tools.
- 01:16 🔪 Cutting involves applying a directed force, requiring the tool to be harder than the material.
- 02:10 🛠 The transition from the Stone Age to the Bronze Age brought the use of metal tools, starting with copper.
- 03:06 🧬 Metallurgy emerged in the Bronze Age, allowing for the creation of alloys and manipulation of metal properties.
- 05:00 ⚒ Bloomery furnaces allowed the processing of iron, leading to the development of wrought iron.
- 07:09 🔥 The blast furnace further advanced iron processing, leading to large-scale production of pig iron.
- 09:04 ⚙ The Bessemer process revolutionized steel production by efficiently reducing carbon content in iron.
- 11:00 🏭 Machine tools evolved from simple hand tools to complex machines, enhancing precision and efficiency.
- 13:28 🖥 CNC (computer numerical control) machines automated production, achieving high precision and repeatability.
- 14:39 🔧 High-speed steels, introduced in 1910, withstood higher temperatures and cutting speeds, advancing tool performance.
By 7:56 you say low carbon, but cast iron is a high carbon alloy.
You have said this before so i thought it better to mention.
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.
Loved the video. I didn’t know what I was getting into and it has been illuminating. Thank you.
missleading thumbnail, i thought I was going to learn the science behind cutting with/against the grain of steaks and cooking techniques
I almost got killed by a lathe once. Even if it’s -40 degrees Celsius outside, and the shop you’re working in is an old miner’s barracks with holes in the walls so it’s around -10 in the shop… never let down your sleeves.
Id argue cutting was discovered by beaks, teeth and claws
I would argue it was discovered by angsty teens. Perhaps it was discovered separately depending on definition and use then.
it is improper to say cutting shear force. any cutting has to start with high crushing stress otherwise the sharpness of the tool becomes unimportant. if only shear stress is important to cut, one can cut with blunt tool (other edge than sharp edge).
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.
i was going to watch this but autoplay said: history guy - the history of superglue.
the videos make a good doublet, especially considering their introductions. 😊
Some animals have various cutting capabilities, and animals even use tools. But what differentiates human from other animals is our ability to use stared energy.
Stored energy, such as fuels for burning like wood and oil helped keep us warm, cooking food (making it more edible), and do metal work.
Whoever was experimenting with alloys and decided to risk using rare aluminum to make aluminum bronze was super lucky because that's almost as good as steel in a lot of properties , plus gold look would be popular too, I bet.
Great video as usual. Please make video on evolution of (or Science of) precision measuring tool and machines
MISLEADING TITLE.
Hey Bruno, if the title your video is "The Science Of Cutting", you talk about the science of cutting, NOT about some other subject like the history of metallurgy or cutting tools or whatever.
MISLEADING TITLE.
You cannot talk about cutting without going over the tools and therefor materials needed for cutting.
the weird thing about machining is removing huge amounts of material but layer by layer while water jet, plasma, edm can cut big chunks very precisely in one go. machining is still useful to make concave shapes, but if you can make the convex shaoe that's rhe closest to you final part and only then machine the concave part, it siund like you can save lot ot time, znergy and wear on the tools ?
3d printing/additive technologies are very interesting but I dont think its anywhere ready for mass prooduction of parts, neither in terms of quality, precision or speed.the only exception is when the more complex shapes allowed by additive technologies enable new features. I have 3d printed soles in a pair of addidas, I like the looks but I wouldt say it makes such a big difference
each technique having its advantages, I think not a dingle one is going to disappear soon but by combining them manufacturing is going to keep improving. where 3d printing take things ro the next level is 3d printing things on site that cant be moved easilyy like 3d printing houses or sending a self replicating 3d printer on another planet to start naking the building blocks for a civilization
Great video - as always! Thank You!
Excellent video, thanks!
Fascinating video, as always.. thanks, I've learned a few things today!!
Wow- this is like 1/3 of my materials science 101 class, minus the math.
Fascinating! Just imagine the new metals and materials we'll see once we begin to mine asteroids. Pity I won't be around to see it, but our kids and grandkids very likely will.
The melting point of copper is about 200deg C below steel but I would hardly call 1000 deg C ' a low melting point'...
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 👍
As a machinist this is peak for me
8:45 you just read out a Wikipedia paragraph. it's kinda disappointing
I saw the thumbnail pop up and I was like YEAH!
Then I watched it and did not see the clip from the thumbnail and was pissed!
Excellent video! 👍💛
Very well made video.
Good morning all!
4:31 how is this recorded?
This is my biggest fear. I haven't watched this video but. I'm saving it for when i can watch it
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?
interesting topic and nice video. thanks
3:02 The Bronze Age? Yeah I know him! He plays for the Lakers, right?
7:55 Cast iron has a higher carbon content than steel so it isn't really "low carbon"
Very interesting.
This was fascinating but you missed covering when we invented sliced bread
i was coming here thinking "hrmm, psychology?" and ended up learning about the history of cutting tools
I thought you said ‘chipping away at a pebble with a hamster’. Had to rewind that.
I’ve found my calling. I’ve been feeling like looking into a trade such as plumbing or electrical work and since 2017 I’ve been working in the restaurant industry numerous positions but after coming across this video it reminded me Metal working is in my blood 🩸 my last name is Ferraro meaning blacksmith in Italian. My grandfather worked on airplanes and was a mechanic for General Motors and my father was a hippie
What a fantastic history thanx man :)
Your inflection dips at the end of every sentence. Stop that.
Otherwise, great stuff! Subscribed.
Machinist for ten years, let’s see if I learn something
well, did you?
2 entire university semesters shown in 20 minutes. Nice :)
All of this evolution just for me to cut my fingers on a carbide end mill stuck in the shank
I thought this was about cutting as in the gym version of decreasing your fat %
Have you read "The Perfectionists" by Simon Winchester?
Is this a reupload?
very good book report A+
Many thanks
Great video
i just wonder how they figured out wayyyyy back then, that you could melt and how to melt copper
Bronze is actually very resistant to corrosion is why propeller blades on ships are made with bronze
Hey hate to be that guy but you forgot to mention the main ingredient in modern day steel specifically from Asia. It's called chineasium
puddling was for wrought iron
I feel like I was understanding this video less and less as the video went on
Isn't this a re-upload?
I was expecting this video to teach me the secrets of cutting kitchen ingredients with a knife like the pros do. Please change the preview image because it’s very misleading.
Thanks
Excellent!
Next..The Science of Cutting Que
amazing content
Another incisive report!
I came here to be better able to cut hot pizza, and now I can do it with greater speed, and an accuracy to within 1.5 microns.
Least exciting part of this video? The boring mill. X)