So, when flat earthers claim the earth is flat, maybe they're just working with higher tolerances...

@jongwookmah603

3 жыл бұрын

Incredible. This man needs to be the next President.

@silo3com

3 жыл бұрын

The earth is flat in the context of a human being. The sun also revolves around the earth from our perspective. It isn't accurate to take only the scientific perspective.

@martynridley3671

3 жыл бұрын

@@silo3com From our perspective, the sun merely moves across the sky. It's science that tells us otherwise!

@colemanadamson5943

3 жыл бұрын

@@martynridley3671 Indeed! Science - so called. Nowadays men believe what used to be called the "idiot box" instead of their own eyes!

@martynridley3671

3 жыл бұрын

@@colemanadamson5943 'so called', 'idiot box'?...explain what you mean.

"The definition of flatness quickly become..." Become what.... BECOME WHAT?

@kubacube342

3 жыл бұрын

moot (whatever that means)

@alexisandersen1392

3 жыл бұрын

It doesn't really matter.

@hawkhawkens6100

3 жыл бұрын

Endless

@alexisandersen1392

3 жыл бұрын

eight

@cillacowz2668

3 жыл бұрын

Muh

"Do you want to experience true level?" -Rick

@micahlindvall285

3 жыл бұрын

This is all I could think about watching this video.

@ChargedTTq

3 жыл бұрын

I came to the comments to find this comment.

@Toxicity1987

3 жыл бұрын

Funny enough, booth are not compatible. A perfect flat surface is not level because a perfect level surface mimics the gravitational force of the Earth.

@jeffklaubo3168

3 жыл бұрын

@@Toxicity1987 listen here... captain buzz-kill...

@james4wd236

3 жыл бұрын

The second I saw this video that's what I thought of.

My wife says she's flat I told her she's within tolerance

@Grannybang35

2 жыл бұрын

😂😂

@jagtan13

2 жыл бұрын

@@albratgaming2348 I think we lost him bud!

@MikeBova1

2 жыл бұрын

@@jagtan13 sorry guys I had to sell everything to get her implants, now im stuck reading the comments at the local library

@jagtan13

2 жыл бұрын

@@MikeBova1 you're alive! 👍

@MikeBova1

2 жыл бұрын

@@jagtan13 I'm still sleeping with one eye open because... you never know

To everyone wondering why the video cuts off abruptly, I lost the last 2 seconds of my audio file. It's supposed to end with "At these scales, the definition of flatness quickly becomes moot."

@hipser

4 жыл бұрын

Never apologize, you are a perfect ray of sunshine.

@paint4pain

4 жыл бұрын

Top marks for the way you explained how to get a reference surface without getting bogged down into datums and such. Also, I have the same set of old Russian optical parallels, I just need to find a lamp for them, my LEDs aren't monochromatic enough.

@jimviau327

4 жыл бұрын

Great video. Thanks for explaining the missing end.

@AlessioSangalli

4 жыл бұрын

What about a reupload?

@si98justme1

4 жыл бұрын

I thought it was deliberate and brilliant!

Nice video, but it ended flat.

@hipser

4 жыл бұрын

your whole life is flat

@phillhuddleston9445

4 жыл бұрын

@@hipser Your head is flat :(

@neriksen

4 жыл бұрын

Real Health Quotes, LLC ..... You mean it left you feeling flat

@WernerBeroux

4 жыл бұрын

The Earth is flat. Wake up!

@canlib

4 жыл бұрын

@@WernerBeroux you're asleep at the wheel-sphere

I took a tour of NASA's Glenn Research Center in Cleveland, they created a sealed room with an absolutely flat floor, within some microns of tolerance. I can't remember what kind of testing it was used for but they seemed pretty proud of it.

@DDKolt

Жыл бұрын

It could be for the James Web space telescope. Smarter Everyday has a video about it.

@GeneralKenobi69420

Жыл бұрын

At those tolerances I suppose it pretty much looked like a mirror

@SH-bl9wh

Жыл бұрын

Saying something is 'absolutely flat' is like saying a square is a circle. No such thing as something completely or absolutely flat.

@alexh5725

Жыл бұрын

@@SH-bl9wh Bruh, they specified "absolutely flat *within some microns of tolerance* " that's definitely not saying something as stupid as "a square is a circle" , and isn't even saying it's perfectly flat. Why be so pedantic?

@p.g.3806

Жыл бұрын

I like the idea of a NASA scientist hosting a house get together, boasting about his extremely flat living room. ‘Ya, its within 5 microns, using statistical sampling.’

*Me, an A-cup:* "Finally! A youtube video just for me!"

@boncattoo

3 жыл бұрын

Very nice pettan.

@SinCosILoveIt

3 жыл бұрын

Rushia wants to know your location

@wilsonwilson3674

3 жыл бұрын

I was waiting for this type of comment, ngl

@justforshit57

2 жыл бұрын

You will never be a woman

@diobrando2160

2 жыл бұрын

@@justforshit57 Redpilled

The gaskets aren't just for imperfect surfaces. They are for materials that grow, shrink and warp with heating and cooling... Every component in an engine bay for example.

@PhthaloType

4 жыл бұрын

Especially dissimilar materials that expand and contract at different rates (e.g. iron block and aluminum head)

@Rubixdecampo

4 жыл бұрын

Very true.

@RunDub

4 жыл бұрын

Old air-cooled Porsche engines don’t even use head gaskets. They rely on the thermal expansion of the materials as the engine heats up,and the precision machining of the parts,to seal the combustion chamber.

@dilligaf0220

4 жыл бұрын

@@RunDub Which is why air cooled Porsches need a $17k rebuild/remachining every 17k or 3yrs.

@MyriadSkies

4 жыл бұрын

Right, so it becomes imperfect somewhere along the lines =P.

I think you missed an important part of flatness which is the 3 plate method, who's discovery allowed us to create flat surfaces without the need for a known flat reference. We couldn't rely on any of the methods you showed in this video without the use of external flat references making up the machines and tools used to measure them. The 3 plate method gave us those first reference surfaces.

@RealHankShill

4 жыл бұрын

Thank you, I am glad someone mentioned it, even though I had to scroll halfway through the comments to find one of the most important inventions in machining history.

@RealHankShill

4 жыл бұрын

Thank you, I am glad someone mentioned it, even though I had to scroll halfway through the comments to find one of the most important inventions in machining history.

@allennelson1987

4 жыл бұрын

I think I have an idea of what you mean by three plate method, but from Wikipedia's explanation, it sounds like it would only create a plate that is round, they could easily create a dome shape or a crater shape.

@goodkopbadkop9054

4 жыл бұрын

whose* discovery

@williamhinrichs6558

4 жыл бұрын

@@allennelson1987 I find that Wikipedia often times has explanations that are technically some of the most correct definitions or descriptions of concepts, but not always a good explanation for someone unfamiliar with that concept. You are correct that if you only had 2 surfaces to rub together, you could eventually get them to mate to one another near perfect (or perhaps even perfectly), but that doesn't guarantee that you also have 2 surfaces that are flat, only that they mate/fit together perfectly. The 3 plate method successfully cancels out some of the "doming" effect as you called it (convex and concave surfaces) and with multiple cycles of choosing to rub different combinations of 2 of the 3 plates together, can achieve some of the best flatness achievable by mechanical means. This is going to be an over-simplification, but I think it could help understand the core concept of what makes the 3 plate method work. Imagine you had your first plate that was kind of dome-shaped. To clarify, that first plate is thinner on the edges and protrudes in the middle. When you rub it together with a second plate, it would make the second plate like a dome, but in the opposite direction, right? Like thinner in the middle and a little thicker on the edges, so that it matched and fit perfectly with the first plate. Well, do the same thing, but set the second plate off to the side for right now and bring in a new third plate to replace it. You'll be rubbing that same first plate, the dome-ish one against this new third plate until they fit together again, making the third plate pretty close to how the second one was, thinner in the middle, and thicker around the edges. At this point you set that first dome-shaped plate aside and focus on the 2nd and 3rd plates. What do they look like? Well, they've both got that anti-dome shape, where the edges are kind of raised and the center of the plate is a little recessed/sunken compared to the edges. These two plates are by no means identical, but they are close. If we were to set those two plates against each other, with their anti-dome faces in contact, what would be the surface that would come into contact? Since both have the edges protruding compared to the center, the edges of both of those plates would touch first. If you rub plates 2 and 3 together, you will be almost guaranteed to wear down the raised edges before you wear down the middle (there's proper techniques to follow here, but again, I promised a simplification). So now plates 2 and 3, after having their raised edges be the first thing to be worn away, you're left with 2 plates that have had quiiiite a bit of that dome-ishness removed from their surfaces. There's a ton of other interesting stuff going on, but hopefully this explanation serves as a foot in the door, and you can increase your understanding from there. I think important terms to understand that could help with reading technical literature on the subject would be: 'abrasion', 'bearing', 'concave', 'convex', 'plane'/'planar' Additionally, when I was super confused about the whole thing, I was able to find some pictures that finally made the core concepts "click" for me. Wikipedia doesn't always have illustrations that make the most sense, so if you don't immediately get it after reading a short, technically-worded summary, don't worry about it, keep searching for an explanation that you understand, and if you don't understand it, try to find exactly what about it is confusing you and search that concept, or just find someone and ask them how that things works.

Tickles me now to recall the Metrology class back in the early '90's; where the statement that even the thought to be flattest surface, still sits on just 3 of its highest points.

I’ve had a pretty interesting perspective on flatness going from woodworking to becoming and engine machinist.

@randoprior4130

2 жыл бұрын

It very quickly goes from "eh, wood glue will fill the voids" to "yes it is perfectly flat but is it REALLY FLAT?!"

@matthewcornelius5862

Жыл бұрын

Totally opposite for me. I have been a tool and die maker for most of my career and now just getting into wood working. Needless to say it has driven me to the edges of insanity.

@bryandraughn9830

Жыл бұрын

@@matthewcornelius5862 Oddly, when your mind is working towards an exaggerated level of perfection, your woodwork will "pop" when completed. People will ask "how do you do that?" It's a culmination of many tiny compensations working together. Works every time too!

Morty knows true leveling.

@Yora21

4 жыл бұрын

I know about the water and the bubble, Morty!

@samuelvreede770

4 жыл бұрын

Rick

@adammada511

4 жыл бұрын

and there it is lol!

@SpecialEDy

4 жыл бұрын

Lambs to the cosmic slaughter!

@YanaiSachs

4 жыл бұрын

I dabble in PRECISION

I have a special butter knife I use to spread the atoms out evenly for perfect flatness. Only works with monochromatic blackberry jam, though.

@SuperDeinVadda

4 жыл бұрын

So if it doesn't work with butter, why call it a butter knife? Surely it is a monochromatic blackberry jam spreader knife

@nowvalleydiorama885

3 жыл бұрын

I'd love to see a video on flattening peanut butter with your knife.😂

@BrilliantDesignOnline

3 жыл бұрын

@@SuperDeinVadda You are right: an MBJSK; make NASA proud using TLA's

@2x489

3 жыл бұрын

i feel like i am reading an scp file

@BlackSoap361

3 жыл бұрын

@@SuperDeinVadda it does amazing things with butter, too

12:37 -At these scales, the definition of flatness quickly becom *ERROR*

Very well done. As a retired Certified Mechanical Inspector and Metrologist, I found many people not familiar with GD&T would have a difficult time understanding flatness. They would always get it mixed up with parallelism. Flatness is essentially a characteristic measured to itself. I sure miss those days.

@howtoguro

6 ай бұрын

Metrologists Unite! (We do not predict the weather)

I see the KZread algorithm has brought us all together again. I hope you’ve all been doing well.

@kinga6347

4 жыл бұрын

My happiness is immeasurable and my day is saved

@zoesdada8923

4 жыл бұрын

Best comment of the year

@Asdayasman

3 жыл бұрын

I haven't! But thanks.

@diegohuijbregtsgarcia5102

2 жыл бұрын

It did it again. I was so surprised to see a comment of my own on this video, goes to show how easy it is to consume and forget.

@stephenk.5839

2 жыл бұрын

They knew I would be one of the suckers who could not resist clicking on to the bait for a subject such as this.

Last two minutes really squashed this machinists mind. Good video.

@JohnD595

4 жыл бұрын

Austin Page i worked at a grinding shop for about a year. Those last 2 minutes were normal to me 😂

@randommcranderson5155

4 жыл бұрын

Search for a video by Andor Gafotas titled "indistinguishable from magic: manufacturing modern computer chips". It's a talk from 2009 that does a really good job describing some of the crazy manufacturing that goes into modern chips, with thin film deposition layers measured in atoms and the result having to be within 2. As mentioned, the talk was in 2009 and he wasn't talking about trade secret cutting edge stuff even then, and its also relatively large scale manufacturing, not experiments in labs done for papers. It's about an hour long, though. Worth a watch.

@Villains_Nate

4 жыл бұрын

only a machinist knows there is no truth, only "within tolerance"

@stevethea5250

4 жыл бұрын

@@JohnD595 I sent this vidnto my gf as a joke 😏

@operator8014

4 жыл бұрын

Yeah, nobody but OOOOLD timers that don't understand new systems really do it like that anymore. Modern electronics do a better job, faster, and often cheaper than a good optical flat kit. Less maintenance, and cheaper calibration and certification too.

Imagine making an engine that is bonded by spontaneous cold-welding due to perfect flatness in a vacuum. You couldn't open it to check it I guess but fuck it, it would be impressive.

@AJ213Probably

2 жыл бұрын

Space manufacturing is going to be great

@timmyopally

2 жыл бұрын

@@AJ213Probably "I'm tired of this (lack of right to repair) grandpa!" Elon: "well that's too damn bad!"

@clarence4343

2 жыл бұрын

It would be cool if it worked, it would be good if the head and block were the same material otherwise heating and cooling would warp the surfaces and create a mess

@cyalknight

2 жыл бұрын

I had an idea for a 3D printer using cold welding in a vacuum. The "pixels" would need to be cubes or something with a flat edge.

@chasethompson7392

Жыл бұрын

Just wait til subie owners hear about this

"At these scales, the definition of flatness quickly becommb-" **has stroke**

@ADVBear

2 жыл бұрын

Some say he is flat on a bed to this day.

This should be a required video to watch for mechanical engineering classes.

@timhallas4275

4 жыл бұрын

This should be a required video to watch for flat earthers. They actually think the surface of the oceans are perfectly flat.

@T0BBi94

4 жыл бұрын

Not so much for mechanical engineering classes as for material science classes

@misternintendoman

4 жыл бұрын

I've had a Metrology class as a Machinist that taught me about these topics, it's actually sad that this is not mandatory for a mech eng, this is why i always say a great Mechanical engineer is one who was a machinist first.

@SuperDeinVadda

4 жыл бұрын

I kinda know 90% of the content already. So showing it would be highly appreciated but may not be as necessary as you think.

quickly become moo? I knew cows ruled the world! goddamit

@deadfreightwest5956

4 жыл бұрын

Cow pats are flat.

@nebtheweb8885

4 жыл бұрын

Moot.

@Derpy1969

4 жыл бұрын

“We love our Moo!”

@fcfdroid

4 жыл бұрын

😂 😂 True i thought the same thing

@shredo2

4 жыл бұрын

came down to comments looking for this.

"Have you ever experienced true level Morty?!!"

Aaah, mechanical engineers should watch this in their first semester

@inorite4553

4 жыл бұрын

Mechanical Engineers should be exposed to this in their first internship.

@arjun6358

4 жыл бұрын

@@inorite4553 if only we had a proper internship

@diegohuijbregtsgarcia5102

4 жыл бұрын

Coincidentally, I'm in my first semester of an automotive engineering program.

@epistte

4 жыл бұрын

Geometric dimensioning and tolerancing in drafting/CAD was the introduction to this subject to engineers.

@joser9237

4 жыл бұрын

And any Machinists. I actually worked as a surface grinder, this video glossed over some details but it is exactly what we did. Really any soon-to-be machinist must learn this.

The only way to obtain perfect flatness is to leave a bottle of soda out on the counter for a week.

@koikoi9817

4 жыл бұрын

Then it will finally be drinkable

@NuViss

4 жыл бұрын

Nope! It will be slight curvature (comparable to roundness of Earth) in there ;)

@theyseemeloling

4 жыл бұрын

pop*

@Colonel_Overkill

4 жыл бұрын

@@NuViss also will be curved due to the skin effect of the water that it is comprised of.

@SH-pc4xt

4 жыл бұрын

Only if you open it first!

Very well explained.. I think that all of this can only make sense once you've gone through trying to manufacture parts to flatness levels between 5 and 20 microns in large parts. We've found there's very few machine shops in the world that are capable of doing this work reliably over a long period of time. As you say, half the battle is actually measuring accurately in a repeatable manner.

@OmmerSyssel

Жыл бұрын

Which sort of sophisticated industry are you working with?

@peterraffin2227

Жыл бұрын

@@OmmerSyssel mass spectrometry

Thank you for this quick look into this very interesting field. I especially enjoyed to see the different testing devices. The lens that uses monochromatic light is fabulous. When it sits in its case, it just looks like a piece of glass, until you use it properly.

As someone who works in the engineering and manufacturing industry, I loved this video. I’m subscribing to this channel, I hope to see more of this kind of content here.

@traumatic_

Жыл бұрын

nerd

The beginning of this video reminded me of Joe Pera Talks You To Sleep

@michaelbook2019

3 жыл бұрын

Would enjoy hearing Joe Pera reminiscing about all the delicious holiday meals he's made on those lovely flat granite countertops.

@zaidkhan7133

3 жыл бұрын

Im here from school

@The_Real_Daniel

2 жыл бұрын

The most under rated video on youtube

@stephenk.5839

2 жыл бұрын

A voice that is smooth and flat, within the tolerance zone, will induce lethargy which progresses to the suspended consciousness known as sleep.

@celticknotbrain

2 жыл бұрын

I feel compelled to inform you that while watching this i fell asleep and dropped my phone on my chest. Then picked up my phone and immediately saw your comment. Real life never felt so scripted.

As a CMM programmer, it's always cool to see popular videos like this introducing people to what I do! Great video.

@SighsInternally

Жыл бұрын

do you know what the things at 9:30 and 9:40 are called?

@kylez9094

Жыл бұрын

@@SighsInternallygage blocks

I work with similar stuff: roundness and straightness.

Thank you. This is my real job. You have present it very interesting and correct 😃👍

@ADOBEFXPRO

4 жыл бұрын

Ok, but what's your fake job though?

@MatMabee

4 жыл бұрын

What do you do and how can I begin? You look very well off. :)

@ringlord13

4 жыл бұрын

@@MatMabee Find a trade school or community college that teaches machining or better yet, Metrology (Science of Measurement), though there are very, very, few Metrology schools. My graduates regularly start around $24 an hour and get very close to six figures (with overtime) within 5 years, after only two semesters of Metrology training.

@ghoulbuster1

4 жыл бұрын

Thanks for making flat stuff

@linusteir

4 жыл бұрын

@@ringlord13 curb your expectations, i maker under 16$ an hour with an BA at an NMI

Geometric tolerances are incredibly important in manufacturing and design processes. Excellent presentation, keep making videos of this calibre sir!

@epistte

Жыл бұрын

This is better explained than the labs of my manufacturing process courses and GD&T class.

around 9:30 the concept of wringing... that blew my mind. I had a co-worker several years ago who used to work in calibration and described this to me as one of the tools they used, calibration blocks. That's incredible hat surfaces can just bond like that. I guess it essentially created a vacuum between the parts because they are such a precise fit even air can't get between them.

Incredible video. Metrology is such an interesting field.

Hands down, one of the most unerrated channels. Thanks for the educative yet quality content. Just binge watched your videos. Congrats and cheers :)

as someone who gets structural design courses, and works at a tool manifacturer, this is amazingly well produced and well informed i love it

@larrylund2682

4 жыл бұрын

Nobody actually asked a quality inspector. Tons of guessing going on in this video. It provides most of the basics but, we need more information on how the Flatness is actually called out. Is it to itself or in relation to other datum points?

@epistte

4 жыл бұрын

Drafting 101 GD&T.

@jockellis

4 жыл бұрын

I liked it, too. I worked in a GE Energy machine shop that had 16 CMMs, both in final inspection and on the shop floor. I did NDT but was enamored with all final’s cool tools.

@ringlord13

4 жыл бұрын

@@larrylund2682 Flatness is a form only control, it cannot have a relationship to datums. If a print references either the ASME or ISO GD&T standard and it had a feature control frame with Flatness AND datums, the print is in error and wasn't produced per standard. I agree that it is a great introductory video, but one getting into the level you are asking for would be significantly longer.

Absolutely fascinating- and great info for those who may have a limited understanding of materials and manufacturing. Thanks for this!!

being a machinist we use precision measurement tooling and there are some tables that we use specifically for measuring or hand sanding something. those tables are made out of calibrated slabs of granite.

Great video! As retired mil and new machinist, I found this very informative and well presented. While working on my education as a machinist I took several engineering and GD&T classes. Every little bit of info helps.

@SighsInternally

Жыл бұрын

do you know what the things at 9:30 and 9:40 are called?

@IFearlessINinja

Жыл бұрын

@@SighsInternally Gage blocks or Gauge blocks

Extremely high production value. Well researched and presented. Terrific work! Subscribed. Looking forward to seeing more of your work!

Down the youtube rabbit hole again. Now I'm looking around my house and yelling my wife things aren't really flat. The looks im getting are priceless

Very good job of explaining the basics of flatness. My background in is tool and die making and design and all of what you covered was the world I lived each day. I ran surface grinders and have to maintain tolerances within .0001".

@SighsInternally

Жыл бұрын

do you know what the things at 9:30 and 9:40 are called?

great video. the only thing missing is the beauty of hand scraped surfaces, which would add to the difference between flatness and roughness

@lordchickenhawk

4 жыл бұрын

Also, the "three plate method" deserves a nod in that context. Hand scraping (and lapping) combined with the three plate method is what gave engineering its first accurate reference surfaces for flatness

@bodyno3158

4 жыл бұрын

@@lordchickenhawk The dawn of precision manufacturing.

@Industrialitis

4 жыл бұрын

@@bodyno3158 That is a wonderful video!!!

10:17" ancient Soviet technology! :D

As a production tool maker/tool grinder. . . . you aced this video as far as I go. I've seen videos on how they shaped the hubble's telescope lens and it never ceases to astonish me how much more there is always left to learn in machining. We need to get more young kids into this field right out of high school and college because if we can't build, what are we?

@joea5228

4 ай бұрын

Parasites?

Meanwhile my boy out here rubbing three plates together in turn to make the flattest thing I've ever seen.

@mckenziekeith7434

2 жыл бұрын

Triple lap.

Wow! Thank you for this, my dad was a Metrologist who spent his life making slip gauges and even taught me to lap and perform optical flatness tests

@SighsInternally

Жыл бұрын

do you know what the things at 9:30 and 9:40 are called?

I work for Keysight Technologies, and we manufacture glass in very high-end specification for laser measurement systems... I am going to go quiz the glass manufacturing team, because this was the coolest video!! I had no idea of some of the specs that could be reached with flatness!! Thanks for sharing!!

10:25 lower left portion of the lens... Love the CCCP technology

@mikihisakaribe2319

3 жыл бұрын

СССР

@GbpsGbps-vn3jy

2 жыл бұрын

Do you have an idea from where we can buy that lens?

@udafflong1619

2 жыл бұрын

Also sitting and smiling =)

@coloradostrong

2 жыл бұрын

@@GbpsGbps-vn3jy YES! After reading your question I found your answer. But it doesn't have the CCCP logo. Here: www.edmundoptics.com/knowledge-center/application-notes/optics/optical-flats/

Thank you, that was very interesting! Is there a similar measurement of sharpness?

the tight script and ambient music make for a very immersive experience!

Very interesting video, as a knifemaker its easy to achieve high level of surface roughness but flatness is a real challenge and something to keep improving on!

How does this channel only have 4.3K subscribers? That's insane! You should do collaboration with "It's Okay To Be Smart", he invites people to his channel just to say a few word and then links to their videos. I guarantee you that your subscriber count would rise at least 10 times.

@NewMind

4 жыл бұрын

Ill look into that. i have no I idea what edge I’m missing to get huge. Growth has been slow and constant though and the sub support has been awesome. Thanks for the kind words!

@chrisedwards3866

4 жыл бұрын

@@NewMind Your channel has the content and production quality for older channels with more subs to be willing to collab - though it can take a while to find channels looking to make a video on the same topic as you, and where the schedules work. You're on the right path, and making videos the right way.

@jonathancrawford6919

4 жыл бұрын

I seriously wonder this as well. The quality of scientific/engineering information here is even better than Real Engineering. I think this channel's author might need to invest time into the marketing concepts of how to grow a YT channel; an advertising and marketing adventure and skill set that is very different from just making excellent science/engineering videos. Just don't stop making the videos at least. They rock.

@BenMarvin

4 жыл бұрын

I know right. This channel needs a million subs by this time next year.

@phillhuddleston9445

4 жыл бұрын

Well now he has 5.9K.

Wow. Exactly today, we worked with the magnetic grinder, and we grinded the surface of an steel cube. And the interesting thing is, how precise that grinding is, and even more mindblowing is, that thats not the best surface-fining method like honing, laping etc.... 😃

I just retired after44 years in Aerospace Quality and Engineering. This is one of the best general explanations on this subject that I've ever seen. Great job !

@SighsInternally

Жыл бұрын

do you know what the things at 9:30 and 9:40 are called?

@BELCAN57

Жыл бұрын

@@SighsInternally They're called "Gauge Blocks" usually made of extremely hard steel for wear resistance (although ceramic blocks we're in favor for awhile), they are precision ground on opposing faces - with a surface and finish that is so fine that they are able to be "wrung" together and will "stick" to each other (as in the video). They have various uses in Manufacturing/Quality Assurance applications.

Very informative and well edited video. If ever you chose to revisit this topic, a concern when you start approaching high level of flatness is that temperature differentials throughout the part being measured can significantly skew the results making climate acclimatization an import step before measuring. I've seen toolmakers and engineers struggling with inconsistent readings for weeks only to find out that parts need to sit in the QC room for a while till they acclimate. Otherwise mounted on measuring fixtures can pull the heat out of one part of the piece while the rest is still warm causing it to warp.

@markkoot5318

4 жыл бұрын

I used to flat lapp seals for pumps and they were perfectly flat under the glass when they came of the machine but once they cooled a little the light bands I saw didnt make me happy anymore so yeah temp is a big deal

As someone who works in a machine shop and deals with "the great struggle" daily, I can say this video was well done.

@MrMccurley

4 жыл бұрын

"The great struggle". Yeah, that about sums it up. I'm in the same trade. Perfection is an unachievable goal that some of us struggle to achieve anyway. After tossing the manager in to the chip bin, and getting on with it... ;)

@SighsInternally

Жыл бұрын

do you know what the things at 9:30 and 9:40 are called?

@TheTarrMan

Жыл бұрын

@@SighsInternally Those are called "gage blocks". The ones at 9:40 appear to be ceramic (higher quality, ridiculously expensive) while the ones at 9:30 appear to be the steel "shop grade".

One of the flattest surfaces we know how to produce is pure molten tin. Aluminium has a similar effect, however when it is in its pure molten state it must be kept prohibitively hot to prevent oxidizations forming and ruining the flatness. It’s one of those cool properties I wish more factory games would play around with, needing to maintain a constant supply of a consistent molten metal.

@hfso372

2 жыл бұрын

i wonder if you could get it to harden in an place without gas that reacts to it and keep that flatness

@mirko241

2 жыл бұрын

@@hfso372 You would have to cool it down really slowly, within non-reactive atmosphere. Possible but not the best way to achieve flatness

@trollmcclure1884

Жыл бұрын

actually it's as round as the Earth. And mica is flatter and solid

@Jaxck77

Жыл бұрын

@@hfso372 You can. It’s a fucking nightmare, which is why it’s almost never done.

Thank you for your work! Great video! What software do you use to make animations with the blue background?

What the heck!! This amazing video comes from channel which only had 14K subscribers?? This channel should get millions of subscribers with this amazing explanation and quality content!!

Chances are I'll never use this knowledge, but its still very intriguing and I'm glad I watched it. Thanks for the info

These videos are a blessing when you have the day off work, and your neighbor gave you a special brownie.

Wow! The optical measuring blows my mind! Cool!

You showed a clip of Tom Lipton from his KZread channel oxtools. He has many great videos showing how to create flatness, the science behind it and tooling used to achieve it and how to measure flatness. Tom is a pretty awesome teacher.

My great grandfather used to make precision surface plates. Lots of hand-scraping.

@BestLittleStudio

4 жыл бұрын

It is amazing what the human hand can feel as far as minute changes in thickness and surface uniformity.

@dipi71

4 жыл бұрын

I really admire the look of scraped and flaked surfaces. Hadn’t had opportunity to try it myself yet, but there are many videos about the process. Cheers!

@ClockworksOfGL

4 жыл бұрын

Jim Henline - It was many years ago when my grandfather explained the process, but I recall him saying it involved multiple plates and different colored “leads”, which would show high spots when the plates were rubbed together. My grandpa was a toolmaker himself and hand-finished a 90 degree angle just by lapping it until no light passed by when it was held up against a master square. I had it checked by a metrology calibration lab a few years back and it was accurate within 20 millionths/6” or something insane like that. The old man was really something else - he even specified the exact concrete formation for the foundation when he built his house.

@keiy.4031

4 жыл бұрын

@@ClockworksOfGL You can still get Prussian blue dye which marks the high spots. The stuff he must have used was red lead, or minium. Not so healthy for you, but you can still get the powder as a paint pigment and mix your own compound for hand scraping

@woozhi9218

4 жыл бұрын

@@BestLittleStudio i doubt it ,total flatness was made with three plate method three decent flat surface correcting each other.

I enjoyed polishing flats more than grinding. Second surface polishing was done with the work mated with the block by molecular cohesion as you have shown here. It was a great job but paid squat. Oh, one of my light boxes used a ruby laser.

Found this channel because KZread algorithm "recommended" it for me. For once, KZread got it right! Truly interesting subject matter explained about as clearly as possible and with good graphic support. A winner -- thanks.

12:36 "at these scales, definition of the flatness quickly become..." indescribable by words :D :D

The flatness causing objects to bond is one of the most amazing things I have ever heard!

@currentbatches6205

4 жыл бұрын

It's even more amazing the first time you stick a couple of Jo-blocks together.

@meoff7602

2 жыл бұрын

It has to be the same material. Something this video missed, but clearly showed.

Incredible video! I am an economist myself, but I love to learn about these kind of things I followed everything quite well, until the greenlight part of video came up. Then I was like - ARE YOU A WIZARD :D incredible stuff

9:20 And I always thought it was because there's a vacuum between the two surfaces... In the workshop we have some Mitutoyo gauge blocks; when I use those needed I make sure they are clean before joining them, and am always amazed how they bond together, just like in the video. But I always thought it was, as said in the beginning, due to a small vacuum. In fact, if I try to join them NOT by sliding them together, they DON'T bond. But if I slide them like in the video, they do bond. So I do think it's due to vacuum as the sliding pushes away the air, creating a sealed surface. But I may be wrong. Any ideas?

@rugerdave

2 жыл бұрын

Just an FYI, The proper way to wring Jo blocks together is to clean the surfaces of both blocks by placing a sheet of clean white paper on a surface plate and rub the surface of the block against the paper until the paper is clean, which is the same method to clean the faces on a mic (mike). Then wipe the face of each Jo block on the inside of your clean forearm, then wring the blocks together. If it's not done this way, the Jo blocks will start to get microscopic scratches on them and throw the calibration off. Wiping it on your forearm applies a minuscule amount of skin oil for lubrication. It's not a vacuum, both blocks are dead flat.

Well i see this channel going places. Right up my ally. Earned a sub on first video

10:33 lol no Russian can miss the CCCP logo on that glass.

@coloradostrong

2 жыл бұрын

Да, товарищ! Хороший глаз.

As a mechanical engineer and cmm engineer at an aerospace company is makes me so happy to watch this.

I remember watching my Dad use a straight edge, a set of feeler gauges, a 4" angle grinder (with a varying grit sanding discs) and some heavy cut & polish to shave the warped head of an old Toyota we had as a "bush basher" when we were kids... that fix outlasted plenty of other parts!

@satsumagt5284

2 жыл бұрын

Nice compression ratio

Pleasant, concise delivery of knowledge - thanks.

I just came from how glass is made and they explain the tin floating glass part so this is spot-on I understand perfectly

10:17 -- Anyone else notice the USSR marking on the Optical Flat tool? Is this an old video clip, or is that an old tool?

@bryceforsyth8521

3 жыл бұрын

Old tool.

@linmbritt

2 жыл бұрын

Is that an old tool you have there, or are you just not that happy to see me?

you sir just earned a new subscriber, I myself work in machining, flat really in most cases means I'm within +-0.01mm :D If you go over to the optics side they measure flatness in radiuses the size of the planet :)

@aboriani

4 жыл бұрын

Strothy2 and by radiuses of the size of the planet, you mean infinitely large radiuses, cause the earth is flat, everyone know that. And before anyone takes me seriously, yes, I am joking

@bryanmartinez6600

4 жыл бұрын

I just imagine you going to 0.02 and chuck whatever your making across the shop.

and ensuring the work is uniform in its temperature to avoid thermal induced error.

@soaringvulture

4 жыл бұрын

@carpe diem Imagine if the top of a "flat" plate was warmer than the bottom. The top would expand, causing the plate to warp. This affects flatness.

@genixia

4 жыл бұрын

@@soaringvulture Yes, a 1 degree Celsius difference in temperature between the top and bottom of an AA grade surface plate can throw its flatness out of tolerance. Even without a thermal gradient, materials expand and contract less at their edges, so a surface plate becomes convex as the temperature rises, and concave as it drops. Calibration laboratories go to great lengths to prevent thermal errors - tightly controlled environmental temperature, forced air circulation to prevent vertical thermal gradients, limiting the presence of 70+W organic heating elements (humans) to a minimum, even minimizing lights to limit radiated heat. It's normal to fixture components and gauges, then leave them in place for hours to normalize, then to take the measurements as quickly as possible before the human presence starts to affect readings. NIST have a great document on gage block calibration, "The Gage Block Handbook" , that describes the lengths they go to in order to accurately calibrate gage blocks. Personnel wear mylar capes, cotton gloves and use insulated tongs in order to prevent human heating effects. They even worry about different surface finishes absorbing radiated heat at different rates affecting comparative measurements which they use to reduce uncertainty errors. Yes, thermal errors are very real

@keiy.4031

4 жыл бұрын

@@genixia Yep. I have an inspection block level for leveling machines and it's good for 2 arcseconds, or .0001" per 10". You'll see the bubble start to move if you touch the level, breathe on it, or let a sunbeam hit it. It's a good demo to show people how even minuscule levels of heat can change your measurement. It also makes me wonder why so many shops don't bother with the expense of a temperature controlled shop so the machines can take full advantage of the thermal stability of the environment. The chiller systems can only do so much.

@geraldstewart

2 жыл бұрын

@@keiy.4031 I calibrated these

I work in a steel mill. My job is to grind skp rolls. Our tolerance on a roll 17" in diameter, 6' long is 0.001...I know all about flat lol. We also take a roughness measurement, and there is a tolerance for that as well. That would be a good video as well how smooth is something really.

His knowledge of flatness is so great the CIA redacted the ending

I got to show this to the new guy at the machine shop. He was supossed to paint a stamping tool, painted surface ground mating surfaces and when told to remove the paint he used a hand held angle grinder...

@russellg1473

3 жыл бұрын

Man I’m just out of HS machine shop... Sounds like maybe he didn’t really belong there in the first place lol

11:00 Like for "USSR quality mark" on the optical probe

@martin09091989

4 жыл бұрын

This clip and one other are from Tom lipton, a hobby maschienest and tool maker on KZread. He got these Russian optical flats for cheap.

@bagamax

4 жыл бұрын

Flatten it harder, tovarishch!

@Bob_Adkins

3 жыл бұрын

Actually, the Russians are quite good with optics.

If surface roughness is based _off_ the peaks and valleys of the surface, then what is it based ON?

This video is a whole mood. I sometimes feel flat. Sometimes round. Or like an edge. Or a spike.

As a kid i was wondering about how the first perfectly flat object was made as in my logic that would require something else equally flat to shape or form that object and thereby creating a paradox. Then i learned that liquids are perfectly flat and also that there are many different methods to produce "flatness". And finally i learn that everything is relative and depends on reference frames and that you can not know everything about anything. There will always be uncertainty, thats the only thing we can really know for certain ;)

@mduckernz

4 жыл бұрын

Haha, yep. Even with optical methods there will be gravitational distortion so it's impossible to actually measure it as you can't get a true reference, only better and better approximations of it. But, once you get down to those lowest levels anyway, reality itself becomes kinda lumpy and not at all a thing where straight lines and such even have much meaning :p (like, what even is a flat surface? The atoms themselves have uneven electron field densities, like their shape undulates, so there is no flatness)

@VioletGiraffe

4 жыл бұрын

Liquids are not flat, though, they're curved along the Earth's surface. Which in turn isn't a perfect sphere. Fun fact: if the Earth was a flat disc or rectangle, spilled liquid would still not form a flat surface :)

@Rocksteady8519

4 жыл бұрын

@@VioletGiraffe I get your point but i feel some kind of astounded that you had to mention the earth is curving aka round... If Earth didnt rotate and was covered 100% with water AND gravity was evenly distributed along the entire surface, then it would be quiet close to being spherical no matter how many valleys and mountains it contained. (the moon would have to go at this point also) Liquids are shaped by gravity and surface tension to my knowledge so you cant really apply a shape to it. The "fact" you mention would be nice for others if you elaborated a bit on that part. I totally get it but other people might not

@jaredkennedy6576

4 жыл бұрын

What, were you some kind of ultra nerd as a kid? I guess I wasn't the only one pondering odd questions.

@hunger993

3 жыл бұрын

look up the 3 plate method

Dont you just love when thr youtube algoritem shows you somethings science instead of timewaste

My son asked me the other day if the floor in our kitchen was flat... ... Couple of days later, KZread suggests this. Google is listening!

@anunnakimenagerie

3 жыл бұрын

you can change your settings

Excellent work here. Your use of language is unusually precise. Thanks.

Плоскопараллельные стеклянные пластины из СССР (USSR) со знаком качества :)

@a3sop

3 жыл бұрын

Остатки древней, более развитой цивилизации.

@RyanMcIntyre

3 жыл бұрын

Hahahaha 😂🤣 good one

@OlderSpud

3 жыл бұрын

@@a3sop Цивилизации, которая развивалась, пожирая своих детей.

@a3sop

3 жыл бұрын

@@OlderSpud Детей?

I'm trying to figure out how to properly calculate why "flat is justice" and this has been a huge help. Thank you New Mind, very cool!

@GameFuMaster

4 жыл бұрын

well, flat is justice because when two flat surfaces rub together, they become stuck.

im an industrial mechanic, and ive did some further education. this shit was really cool in school honestly. i specifially worked with molten aluminium, and there is so many exciting things about this industry. also cool using cnc to make very precise machine parts for food industry, or calculations how to cast a part from a bottom of a bmw car.

Ringing occurs when I have a beverage on my coaster where the glass cup collects and drips water from condensation and attaches to the coaster, forming a vacuum. When I lift the cup, the coaster sticks to the bottom for a few seconds.

Very interesting information. I was surprised to find out that very flat objects will stick to each other. Very cool.

@southjerseysound7340

4 жыл бұрын

The first time I saw it in person I was blown away. Whats even crazier is you cant just pull them apart and need to twist them off.

@rabie4x4

4 жыл бұрын

And it's not "exactly" known what causes this.

@PaulBednall

4 жыл бұрын

Air pressure causes the objects to stick or rather the lack of air pressure between the surfaces does.

@markc2643

3 жыл бұрын

Could it be the Casimir effect? Microscope slides are packaged with a powder-like substance between them to keep them from bonding. Occasionally you find them stuck to each other permanently.

@Fritzpuddel

2 жыл бұрын

It's the Van der Waals force.

Don't know why KZread recommended me this and I don't know why I clicked it, but I don't regret it 😂

@NewMind Hey, I just wanted to tell you that I really enjoy your take and explanation of science topics, it is super engaging for me (31) as well as my daughter(8) perfect balance no matter what age or knowledge level!

When I was a 17 year old engineering apprentice, I was told that the incredibly flat gauges stick together because they have no air in between them due to their flatness.

@Yorkiepoocharlie

3 жыл бұрын

The wring together because of their flatness.

@countryjoe3551

2 жыл бұрын

Correct. Gage blocks are held together by atmospheric pressure.

@ras573

2 жыл бұрын

This is exactly what's going on. In open space (vacuum), two pieces of the same metal merge together just by a touch. I don't know why, that's just the nature of metals. It's not happening on earth because there's air in between.

@cmdrmike9958

2 жыл бұрын

@@countryjoe3551 That is mostly incorrect. Although the atmospheric pressure likely does hold the blocks together a little, most of the holding power is something else. That can be proven by putting the gage blocks in a vacuum.

@cmdrmike9958

2 жыл бұрын

@@ras573 That is called cold welding and it is not the force that holds gage blocks together. The most obvious indicator of that is that some gage blocks are non-metal, usually ceramic. Another problem with that theory, is that there is no galling when you seperate the gage blocks again. Finally, the gage blocks still stick together even when there is something between them like a thin layer of oil. That too would interrupt the cold welding process.

"True Level Morty"