I refuse to think of sexual innuendo, just to note: every 100C° an average soft steel expands for 0.1%, that's a thou for every unit of thickness. So this 30mm rod would expand for 0, 0003mm for every degree it warms. Go catch that..
I don't get how ppl use imperial apart from construction where tolerance is within 1/16 of an inch. To me it's like working out and trying to add and subtract fractional numbers is same as trying to do math with roman numerals. Like if you agree with me.
I'll be honest, I was expecting it to be so highly toleranced that the top piece would not go all the way down because it would create a cushion of air
I was waiting for that I worked in a shop making some micro components of diametrical tolerances of .0003 total we used deltronic pins and when they were brand new the pins would have etching on either end of the pin diameter in metric and in imperial and belive it or not it would catch on the etching after time it wouldn't and then you knew you needed a new nogo pin...its crazy the tolerances we can achieve
I've worked in microns before, +/- 1 to 2 microns, if you even breath on that kind of stuff your numbers are off, you need lots of thermal control when working tolerances like that. I've made cylinders like this that would take a half hour to fall that distance, or longer. The surface finish requirements for tolerances that high are also extremely high, the diamond tooling for cutting parts like that costs _waaaaaay_ too much...
@@NotAdamSnider I was interested in machining from an early age, I first got into it in high-school shop class where we had a few lathes and mills, which I fooled around on and taught myself how to use them (my teacher didn't know jack all about machining lol), and eventually became interested in doing it as a career, so after HS I went to a two year technical college for machining. From there I just worked in a number of different shops, learning all the little tips and tricks you can only gain through experience over the last two decades. If you're interested in machining, I would suggest looking at a technical college, it's your best bet for landing a high paying job without having to start out as the floor sweeper or shop bitch like most new machinists do (you'll still be a shop bitch when starting out new but it won't last as long🤣), having practical experience and professional education under your belt will open a lot of doors. In your free time you should be educating yourself as much as possible, watch as many videos and read as many articles/forums as you can to fill the gaps in your knowledge. G and M code is a necessity these days too, you'll need to learn how the coding system works and what does what, there are all sorts of introductory courses in programming and reading/writing G-code. You don't necessarily need to know the software for programming unless that's what you want to do, but knowing how to read the code on your machine while you run it and set up is a must. There's a channel called Titans of CNC, check them out and watch their educational videos, these guys are handing out information for free that myself and my similar-aged cohorts would have killed for when starting out as new machinists, spend some time going through their video library.
I worked at a place where we wrote timing tolerances on the parts themselves with paint pens. Had to avoid writing in certain spots because the paint would throw off measurements.
Except they asked about the tolerance. Not the dimension themselves. If the rod was held to 3 tenths but the receiving hole was 20 tho and you're at a tho you're still in tolerance.
I've machined cylinders bores that were open ended and the piston wouldn't move because the cylinder was on a flat surface, but when lifted from that surface the piston gently descended as in the video. And all done on a 30 year old Hardinge toolroom lathe, no grinding.
@@antonhoward9027 I haft to call you out on that , if your machinest table is like mine it has a film of hydrolic oil on it and you know that shit sticks everywhere , kinda like making seal on that machined cilender end , do ya think .
I'm with you, there, and I'm in my 25th year, of machining service. My tolerance is actually nothing..... literally zero, which is called, "Metal to metal" or "size for size", and is the closet of tolerances. It's the polished finish, that made this guy look good, because he probably has a couple thousandths clearance, at the end of the day. 🤷♂️
@@AmericansWillRise It doesn't mean anything to have a tolerance of zero. Except if you can freeze it at 0K and remove an exact amount of atom, and still you will have a non zero tolerance because of quantum mechanical effects.
@@AmericansWillRise it’s a universal specified tolerance range, and it depends on what range the diameter falls into. It’ll be shown on the chart as a minus, minus tolerance (-0.0XX to -0.0xx). the given tolerance will be different for, say 250-300mm dia than it will be for 300-350mm dia
I was a machinist for 15 years at a shop that made injection molds for medical components. The tightest tolerance we ever had to maintain was +.0001/minus nothing Typically though it was +/- .0002
I was a machinist for 7 years in the 90's. I broke a crankshaft by accidentally hitting the facing switch instead of the turning and destroyed the workpiece. I quit that same day. Having A.D.D. made it very difficult for me to stay focused. It was my first and last major fuck up. I stayed at the same company and became a welder.
I do plus or minus .0007 cutting an 80 inches long turndown that has over .020 tapper on it because our shop is to cheap to maintain the machine. Oh yeah full manual no cnc here.
@@wendull811 I remember doing 5ft long shafts on a machine that cut .003" small in the middle. I threw the tailstock so it was more or less parallel up to half way, then it tapered big about .20" from half way to the chuck. I then marker penned every .0005" on the o/d and tapped the cross slide in that .0005 every mark to get the full length parallel. The tolerance was reasonably friendly at .001" so with a bit of emery, the job was a good'n.
I'm currently designing a process of cutting silicon to a squareness tolerance range of an arc second, or approx 380nm over 75mm. Thankfully I don't have to machine it too.
+/- 0.000mm grinding a go/no-go gauge on a manual Jones & Shipman. Probably took about 10 minutes to sneak up on the last few microns, but i hit my target on both ends.
@@shannonsears3496Not necessarily. I remember back in the day asking some of the tool makers when they handed me a print of a part they wanted me to make, "How close do you want me to get this? You don't have any tolerances listed". They replied with "Right on is close enough" 😅
Ran some flanges one time out of 1018. They were about 4" diameter on the flange and about .375 on the shaft tip. Had 3 diameters on the shaft and the face of the flange that had to be 32 finish. But the middle band on the shaft had to be a 16 finish and was .0003"-.0000". I had to hand polish, wash with coolant, wait 5 minutes to cool, and then measure. Went to CMM, so it had to be right.
As others have pointed out, that’s not an INSANELY tight tolerance because the shaft wouldn’t go into a blind hole if it was that close due to air pockets compressing inside the blind hole. It would push the shaft back out some after you put it in, which is the type of tolerance you’d want for hydraulic systems. I’ve probably worked about that close before, but it’s not especially frequently that I do. I work in a small job shop where we are most often doing repair work for factories, remaking their broken parts, or making new builds for them. There are some things we have to do (ie rollers with press fit bearings, etc) that we get pretty tight tolerances on, but usually we don’t have to be that specific. However, when I was still in trade school just a year or two ago, I made an optional part with a really tight tolerance on one feature that was .5000, I believe the tolerance was -0, +.0003. That experience taught me (after scrapping a couple) that you can’t just take a finishing cut and expect it to be right on the money due to tool deflection, heat, and so on. I roughed it down, got a good surface finish within a few thousandths, then very carefully worked my way down with tiny cuts, high rpms, and a sharp tool. Was a cool experience. I’d love to go back to trade school just to try and do everything better and faster than I did the first time. I’d kill for a home shop of my own, even just with a few used machines. Maybe some day…
I regularly work on tight tolerance holes, the plug gauge hardly goes in, I rely on the bore micrometer. I would guess the tolerance on the ID is around 0.03-0.04mm.
One micron is pretty darn impressive! I had the fun of working to half of that tolerance back in the day when working on aerospace components. Had to be a temperature controlled environment as even a couple degrees difference would scrap a part out. We used wooden wheels on a Myford grinder to polish the sealing surface of valves and they were better than a #2 finish. Had to be optically flat. Absolutely mirror finish, not a single flaw allowed on the surface. It's literally like working on ultra high quality reference-grade gauge blocks. You even had to use special measuring equipment to avoid leaving any marks because using the wrong equipment was enough to scrap out one of those pieces.
@SuperSonicMaster007 IRL I make a number of 1911 parts, and the tightest we go is .0005, but other places its +/- .003. The sharpie joke just hit me hard lol
As a tool and gauge maker I made gauges to +/- 50 millionths of an inch using good quality tool room machinery. In my own work shop I've bored bearing OD seats to -.0002" from nominal, I think. Using a telescoping gauge and micrometer, that's what I measured after several iterations of measuring. The proof, of course, is in eating the pudding; and the bearings were fitted into those bores with a minimum of tapping required with a piece of hardwood. In each of these instances great care was required to achieve this, such as multiple measurements taken after the work piece cooled off. Agreed that with purpose-built machines and measuring tools, this kind of tolerance would be much easier to achieve.
Large bore Diesel fuel pump elements, plunger and barrel, are some of the tightest parts around. As a matter a fact in a lab you measure their tolerance based on how much air pressure they can hold between them.
Ese deslizamiento qué se muestra es provocado en parte por el vacio qué se crea al interior del buje al introducir el perno no tanto por la tolerancia al no tener salida de aire y lo tolerancia no es tan cerrada
If you want to challenge machinists to hold close tolerances, the test shouldn’t be done on a lathe. That’s too easy. Each guy should be required make the same part, on the same manual overhead mill. And the room should be isolated with plastic film, so that the temperature and humidity remain constant throughout the competition. Each man should be issued the same drawings, and the same brand new set of cutting tools. But what to make? Hydraulic control systems are often pressurized to 5000 psi, or more. So instead of measuring the accuracy of each man’s part (which is boring) have them fabricate and bolt together a hydraulic assembly. And then test each assembly to the point of failure. One guy could make it 5000 psi, and another guy might get to 8000 psi. It’s not luck. But there is a tiny bit of chance involved. By using friendly competition instead of hard numbers, the whole thing would be more fun. And of course the losers would demand a rematch. Hard numbers are fine for quality control. But not for having fun. Nobody should measure their life in hard numbers.
lathes alone cant make perfectly round parts. i can put your best lathe part on a machine and see its profile at 100,000x magnification and tell you how well it would fit in a specific hole.
I'm an intern machinist at a repair company the tolerance for lathe machine product made by an intern is ±0.2mm at the start of internship and ±0.05mm at the end of their internship measured using only a vernier caliper.
That is like +-0.05mm tolerance which is not thaaaat big of a deal. You can easily get that on your cnc turning machine. I even manage to get that same effect with +-0.07mm tolerance. But hey it's really cool video for sure. And for the people who does and doesn't work in this industry is very appealing for eye or ear. Kudos to you. Keep up with the good work! Greetings from Croatia
I've worked with bearing manufacturering makeing components on hand machines with 0.5 microns everything had to be temperature control and finished parts had to stabilise
Since blocks work on such close, and accurate tolerance that once the air is removed between the blocks, they would appear to be magnetic, but are actually just that exact, and correctly perfect tolerance ! Our machine shop instructor demonstrated them for us, and then, made sure to remove any, and all skin oils so as not to contaminate them !
Piston gauges for pressure metrology typically have sub micron gaps. The diameter is precisely known so when loaded with a precise mass, the gas pressure it takes to float the piston can be precisely known. There is some gas lubrication/leakage but it takes enough time to get a stable measurement.
i have seen barrel chambers consistently cut to a tolerance where if you block the muzzle end of the barrel the cartridge wont chamber into battery, unblock the muzzle and it drops right in. company initials are PR
Now try doing that with wood work. My Dad has a fine crafted tea box my great grandfather made about 100 years ago. It's a rectangular outer box with 2 square boxes inside. if you take one box out and put it back the air pressure when its pushed in lifts the other box up.
My tightest, probably the +-0.00005" on bored holes in 6061 for fiber optic switches. Yep, 50 millionths of an inch. Oh and measured with Deltronic pin gauges by hand/feel. About 20 years ago.
Polish those parts to 8micron with some diamond polish is what I did to those similar PC ,for 13 years I did surface benching lowest I ever got was .08 micron (less than 1.)with H13 50-52 rc
I used to do Layout work, and we had some gages that were so precise we'd have to wait hours for them to cool down to room temp before we could get an accurate measurement. I'm talking like half a micron. Just breathing on them would alter the reading. Funny thing is that they'd go out on the factory floor and get used by operators who would abuse them in twice the humidity and 30° hotter temps.
Nice work. To answer the question I used to mass produce components that had a flatness tolerance that was within a micron and gasket heights that were +-1 micron. There is some pretty amazing metrology equipment out there nowadays.
The smallest I've ever seen on a drawing was 0.0000013 , or 0.0003 mm. We actually ground custom Johnson blocks, stone barely touches and then take it too the zeiss measuring machines
I want it to be so flush that it shouldn't go in because of thermal expansion when you touch it
Sir..... SIR!
Sounds like things are hypothetically getting hot around here.
Lol and it would be for some asinine retail display
Lube?
I refuse to think of sexual innuendo, just to note: every 100C° an average soft steel expands for 0.1%, that's a thou for every unit of thickness. So this 30mm rod would expand for 0, 0003mm for every degree it warms. Go catch that..
I once cut a piece of wood within 7/8” of the actual measurement. So… thats not bad.
Makes me feel pretty good good... I've gotten close to just about an 1/8" over 3/4".
Please talk in metric sir, i don't understand your gibberish
@@yak-machining
23 mm
Who is here like using metric system? I'm European so I don't even understand how ppl use imperial. I think
I don't get how ppl use imperial apart from construction where tolerance is within 1/16 of an inch. To me it's like working out and trying to add and subtract fractional numbers is same as trying to do math with roman numerals. Like if you agree with me.
I'll be honest, I was expecting it to be so highly toleranced that the top piece would not go all the way down because it would create a cushion of air
That would probably be the case, if the bottom side of the bore was sealed airtight.
It's sitting on a paper towel precisely so the air can escape. It wouldn't fall very far if it was compressing trapped air below it.
@@let88it88be I was waiting for a second run with it off the table so it would fall right through rapidly.
Yupp but you can achieve it with wire edm or edm machine 😅😅😅. 0.5 to 2 microne tolerance 💥💥💥
A cushion of air,
like in our heads...
Cant be that tight if the sharpie didnt make it oversized 😂
I used red sharpie so I could see to touch off on a Moore G68 Jig Grinder. The ink is about .0002 thick.
@@davids2733 Black one being almost double the thickness than the red one. Blue being in the middle. And Edding brand being thicker than Sharpies.
0.0002 seems abought right. I use marker for a shim sometimes on wet grinder when getting thin pieces flat.@@davids2733
That was the first thing I thought about also...
@@davids2733sharpie is roughly 2 tentousanths?
Imagine if it was so close the marker stopped it!
That's what I thought first
Sorry i write first then read 😉
@@marcinkotao8702 me too :)
I was waiting for that
I worked in a shop making some micro components of diametrical tolerances of .0003 total we used deltronic pins and when they were brand new the pins would have etching on either end of the pin diameter in metric and in imperial and belive it or not it would catch on the etching after time it wouldn't and then you knew you needed a new nogo pin...its crazy the tolerances we can achieve
xD 👍
I've worked in microns before, +/- 1 to 2 microns, if you even breath on that kind of stuff your numbers are off, you need lots of thermal control when working tolerances like that. I've made cylinders like this that would take a half hour to fall that distance, or longer. The surface finish requirements for tolerances that high are also extremely high, the diamond tooling for cutting parts like that costs _waaaaaay_ too much...
As a wool classer, I work in half microns every day. Eat that.
Hey that’s cool man. How’d you get into that stuff? And what would you say to someone who wants to get into that kind of work as their career?
What needs such low tolerances?
@@NotAdamSnider I was interested in machining from an early age, I first got into it in high-school shop class where we had a few lathes and mills, which I fooled around on and taught myself how to use them (my teacher didn't know jack all about machining lol), and eventually became interested in doing it as a career, so after HS I went to a two year technical college for machining. From there I just worked in a number of different shops, learning all the little tips and tricks you can only gain through experience over the last two decades. If you're interested in machining, I would suggest looking at a technical college, it's your best bet for landing a high paying job without having to start out as the floor sweeper or shop bitch like most new machinists do (you'll still be a shop bitch when starting out new but it won't last as long🤣), having practical experience and professional education under your belt will open a lot of doors. In your free time you should be educating yourself as much as possible, watch as many videos and read as many articles/forums as you can to fill the gaps in your knowledge. G and M code is a necessity these days too, you'll need to learn how the coding system works and what does what, there are all sorts of introductory courses in programming and reading/writing G-code. You don't necessarily need to know the software for programming unless that's what you want to do, but knowing how to read the code on your machine while you run it and set up is a must.
There's a channel called Titans of CNC, check them out and watch their educational videos, these guys are handing out information for free that myself and my similar-aged cohorts would have killed for when starting out as new machinists, spend some time going through their video library.
Ah, a fellow DT machinist!
Manufacturing tolerance callout: "Rubs but doesn't bind," You’re there!
I worked at a place where we wrote timing tolerances on the parts themselves with paint pens. Had to avoid writing in certain spots because the paint would throw off measurements.
If the tolerance was so tight on those two mating part with a blind hole, you wouldn't fit it in due to compressing the air.
I think most of the air is leaking thru the towel below it.
@@court2379😂😂😂😂😂😂lmao bro good observation
Except they asked about the tolerance. Not the dimension themselves. If the rod was held to 3 tenths but the receiving hole was 20 tho and you're at a tho you're still in tolerance.
I've machined cylinders bores that were open ended and the piston wouldn't move because the cylinder was on a flat surface, but when lifted from that surface the piston gently descended as in the video.
And all done on a 30 year old Hardinge toolroom lathe, no grinding.
@@antonhoward9027 I haft to call you out on that , if your machinest table is like mine it has a film of hydrolic oil on it and you know that shit sticks everywhere , kinda like making seal on that machined cilender end , do ya think .
The closest i get is usually it doesn't fit at all 🤔
I'm with you, there, and I'm in my 25th year, of machining service. My tolerance is actually nothing..... literally zero, which is called, "Metal to metal" or "size for size", and is the closet of tolerances. It's the polished finish, that made this guy look good, because he probably has a couple thousandths clearance, at the end of the day. 🤷♂️
@@AmericansWillRise It doesn't mean anything to have a tolerance of zero. Except if you can freeze it at 0K and remove an exact amount of atom, and still you will have a non zero tolerance because of quantum mechanical effects.
I almost got my go gauge stuck of my go/no-go pins. Worn-out tool! I'm surprised it was still in tolerance
আগা
I have read that the old Linn-Sondek turntable platter took a full day to settle into its bearing.
If it was stainless it'd gall halfway down & you'd never git it out... 😅
H7/h7 tolerance degree was pretty normal for a lathe for almost 40 years ago.
We hold H6/h6 tolerances out of the lathe very commonly
I made some shaft in j6 tolerance but not so easy to make. Ø25
What is H7/h7?
25 year machinist, and I'm about to learn something, I hope.
@@AmericansWillRise it is a metric tolerance. Search metric tolerancing charts.
@@AmericansWillRise it’s a universal specified tolerance range, and it depends on what range the diameter falls into. It’ll be shown on the chart as a minus, minus tolerance (-0.0XX to -0.0xx). the given tolerance will be different for, say 250-300mm dia than it will be for 300-350mm dia
My machinist neighbor gave me some advice once... no matter how many times you cut somthing you can't make it longer
What if you’re cutting a trench?😊
welding enters the chat.
That's what doctors tell parents right before circumcision.
Every great machinist knows a great welder
@@aaronward3882 true dat!!!!
I was a machinist for 15 years at a shop that made injection molds for medical components. The tightest tolerance we ever had to maintain was +.0001/minus nothing
Typically though it was +/- .0002
Grinding or milling ?
@@brianburke8740 milling
@@jaush69 yikes, that’s super tight.
Plus minus 5 thousandths daily laser cutting.. That was the best you can do..
Sounds like a Kern
I was a machinist for 7 years in the 90's. I broke a crankshaft by accidentally hitting the facing switch instead of the turning and destroyed the workpiece. I quit that same day. Having A.D.D. made it very difficult for me to stay focused. It was my first and last major fuck up. I stayed at the same company and became a welder.
👍😅😅😅
Good choice, as a welder you can always redo your screw-ups :-) easier to add material with a welder than a mill, grinder or lathe!
True. Have done both, often on the same project.
U guys are geat.where do use material with such tolerances
Are some of your readings in mm or inches.imanaged 0,001mm
-0 +0.0004" with my machine being 0.0002 oval. That was something
4 tenths of a thou is quite a big tolerance.
@@jubbaronny try that on a 3 axis mazak miling center
I do plus or minus .0007 cutting an 80 inches long turndown that has over .020 tapper on it because our shop is to cheap to maintain the machine. Oh yeah full manual no cnc here.
@@wendull811 I remember doing 5ft long shafts on a machine that cut .003" small in the middle. I threw the tailstock so it was more or less parallel up to half way, then it tapered big about .20" from half way to the chuck. I then marker penned every .0005" on the o/d and tapped the cross slide in that .0005 every mark to get the full length parallel. The tolerance was reasonably friendly at .001" so with a bit of emery, the job was a good'n.
@@jubbaronny That is exactly how I do it.
I'm currently designing a process of cutting silicon to a squareness tolerance range of an arc second, or approx 380nm over 75mm. Thankfully I don't have to machine it too.
I have a video on my channel where air tight tolerances held 40 pounds for 3 minutes. Cool stuff.
+/- 0.000mm grinding a go/no-go gauge on a manual Jones & Shipman. Probably took about 10 minutes to sneak up on the last few microns, but i hit my target on both ends.
Jones and shipman good machines more of a voumard man myself
Hardinge HVLH!
I ran an old J&S for about ten years, it would hold a tenth or two all day.
Nice machine.
There has to be some tolerance. I do precision grinding in a gage shop.
@@shannonsears3496Not necessarily. I remember back in the day asking some of the tool makers when they handed me a print of a part they wanted me to make, "How close do you want me to get this? You don't have any tolerances listed". They replied with "Right on is close enough" 😅
As a firearm manufacturer, typically we work with +.0002/-.0000 or +.0005”/-.0000 on most of our components, the less important things are +/- .003”
What are the less important parts where you use +/- .003
🧢
@@Josep7565 probably things like how the upper and lower receiver slide with each other or trigger mechanisms, firing mechanisms.
You don’t work for high point then haha
Und geht drozdem alles schneller kaputt als früher . Wow
Ran some flanges one time out of 1018. They were about 4" diameter on the flange and about .375 on the shaft tip. Had 3 diameters on the shaft and the face of the flange that had to be 32 finish. But the middle band on the shaft had to be a 16 finish and was .0003"-.0000". I had to hand polish, wash with coolant, wait 5 minutes to cool, and then measure. Went to CMM, so it had to be right.
As others have pointed out, that’s not an INSANELY tight tolerance because the shaft wouldn’t go into a blind hole if it was that close due to air pockets compressing inside the blind hole. It would push the shaft back out some after you put it in, which is the type of tolerance you’d want for hydraulic systems. I’ve probably worked about that close before, but it’s not especially frequently that I do.
I work in a small job shop where we are most often doing repair work for factories, remaking their broken parts, or making new builds for them. There are some things we have to do (ie rollers with press fit bearings, etc) that we get pretty tight tolerances on, but usually we don’t have to be that specific.
However, when I was still in trade school just a year or two ago, I made an optional part with a really tight tolerance on one feature that was .5000, I believe the tolerance was -0, +.0003. That experience taught me (after scrapping a couple) that you can’t just take a finishing cut and expect it to be right on the money due to tool deflection, heat, and so on. I roughed it down, got a good surface finish within a few thousandths, then very carefully worked my way down with tiny cuts, high rpms, and a sharp tool.
Was a cool experience. I’d love to go back to trade school just to try and do everything better and faster than I did the first time. I’d kill for a home shop of my own, even just with a few used machines. Maybe some day…
I used to keep a die punch set that was cut to this tolerance on my desk. Kept me entertained for hours a day
I regularly work on tight tolerance holes, the plug gauge hardly goes in, I rely on the bore micrometer. I would guess the tolerance on the ID is around 0.03-0.04mm.
agreed, also fairly high feedrate. maybe 0.01"?
কী বালছিরবি বোলিশ
Welp, the lettering didn't stop it, slack fit...aka: hotdog down a hallway, over! Lol, nice work
Closest tolerance I work to .... must be my kids ..... 🤣
I used to hold tolerances to .002
+0 mm
-0,001 mm
On a grinding machine
So +0 -1ųm
0 is impossible :)
@@kacperchrusciel890 +0/-1 Micro meters is what he meant
@@kacperchrusciel890 +0 means it can't be over any, but it can be under
One micron is pretty darn impressive!
I had the fun of working to half of that tolerance back in the day when working on aerospace components. Had to be a temperature controlled environment as even a couple degrees difference would scrap a part out.
We used wooden wheels on a Myford grinder to polish the sealing surface of valves and they were better than a #2 finish. Had to be optically flat. Absolutely mirror finish, not a single flaw allowed on the surface. It's literally like working on ultra high quality reference-grade gauge blocks.
You even had to use special measuring equipment to avoid leaving any marks because using the wrong equipment was enough to scrap out one of those pieces.
That is very good work. I am a machinist and I could not possibly do that
The pop at the end is so satisfying
My parts are so close that sharpie would interfere lol
🤣
@@KinoTechUSA69 that was 🧢
My parts are usually couple thou off. Usually the parts we make have like .005 tolerance and most of the fittings are usually around .001-.0002
@SuperSonicMaster007 IRL I make a number of 1911 parts, and the tightest we go is .0005, but other places its +/- .003. The sharpie joke just hit me hard lol
@@KinoTechUSA69 damn, sounds like a pistol my machining gig couldn't pay for 😂
Be careful not to paint it with the marker too much, it might stop fitting
Thats no joke. A line of permanent marker reads about 10-20 micrometers on an indicator when dried out.
Right On! 🙌 that’s such a good feeling! Nailed it!
As a tool and gauge maker I made gauges to +/- 50 millionths of an inch using good quality tool room machinery.
In my own work shop I've bored bearing OD seats to -.0002" from nominal, I think. Using a telescoping gauge and micrometer, that's what I measured after several iterations of measuring.
The proof, of course, is in eating the pudding; and the bearings were fitted into those bores with a minimum of tapping required with a piece of hardwood.
In each of these instances great care was required to achieve this, such as multiple measurements taken after the work piece cooled off.
Agreed that with purpose-built machines and measuring tools, this kind of tolerance would be much easier to achieve.
Large bore Diesel fuel pump elements, plunger and barrel, are some of the tightest parts around. As a matter a fact in a lab you measure their tolerance based on how much air pressure they can hold between them.
Ese deslizamiento qué se muestra es provocado en parte por el vacio qué se crea al interior del buje al introducir el perno no tanto por la tolerancia al no tener salida de aire y lo tolerancia no es tan cerrada
Там явно зазор минимум сотки 3+ , вы верно сказали про воздушную пробку .
That pop at the end. So nice 🥰🥰
What is precision in one shop is like throwing horseshoes in another
If you want to challenge machinists to hold close tolerances, the test shouldn’t be done on a lathe. That’s too easy.
Each guy should be required make the same part, on the same manual overhead mill. And the room should be isolated with plastic film, so that the temperature and humidity remain constant throughout the competition.
Each man should be issued the same drawings, and the same brand new set of cutting tools. But what to make?
Hydraulic control systems are often pressurized to 5000 psi, or more.
So instead of measuring the accuracy of each man’s part (which is boring) have them fabricate and bolt together a hydraulic assembly. And then test each assembly to the point of failure. One guy could make it 5000 psi, and another guy might get to 8000 psi. It’s not luck. But there is a tiny bit of chance involved.
By using friendly competition instead of hard numbers, the whole thing would be more fun. And of course the losers would demand a rematch. Hard numbers are fine for quality control. But not for having fun. Nobody should measure their life in hard numbers.
lathes alone cant make perfectly round parts.
i can put your best lathe part on a machine and see its profile at 100,000x magnification and tell you how well it would fit in a specific hole.
Thats not a close tolerance it isn't getting hung up on the sharpie marks!
i made drawing dies for making my own cartridge cases on a mini lathe. most parts ended up being +-1 thou.
I'm an intern machinist at a repair company the tolerance for lathe machine product made by an intern is ±0.2mm at the start of internship and ±0.05mm at the end of their internship measured using only a vernier caliper.
An Apprentice! Not an Intern. And you do not measure small tolerances using a vernier caliper, try a Micrometer for the next job.
That is like +-0.05mm tolerance which is not thaaaat big of a deal. You can easily get that on your cnc turning machine.
I even manage to get that same effect with +-0.07mm tolerance.
But hey it's really cool video for sure. And for the people who does and doesn't work in this industry is very appealing for eye or ear.
Kudos to you. Keep up with the good work!
Greetings from Croatia
Wire EDM guys out here like “hold my beer”.
how to get a machinist excited.
wife: “honey, i need you to check my tolerances”
Ancient Egyptians were working to tighter tolerances on 70 ton granite blocks.
I've worked with bearing manufacturering makeing components on hand machines with 0.5 microns everything had to be temperature control and finished parts had to stabilise
This is very close to the proximity of my tolerance running thin when I go out in public these days.
It just needs more refining!
Fun fact, those sharpie marks actually add a few tenths
That's what it sounds like
😂
Plus .0002 minus nothing tolerance on a bearing housing. I was debating life choices while running those parts
I like to keep everything I machine within .0002” . Makes inspections a breeze.
Why ?. If that was the case and I was your boss i'd sack you, the tolerance is there for a reason.
Time/Cost Overkill 😂
@@mythai9593 it was a joke dude, calm down
Since blocks work on such close, and accurate tolerance that once the air is removed between the blocks, they would appear to be magnetic, but are actually just that exact, and correctly perfect tolerance !
Our machine shop instructor demonstrated them for us, and then, made sure to remove any, and all skin oils so as not to contaminate them !
It it started binding at first! Lmao
when your first to fall asleep at the sleep over:
You know it’s a tight fit when the pin gets stuck on the writing.
I thought it was so tight, it would stop when it hits the Sharpie markings 😂
The pins and bushes on my 225 excavator were just like this 12 months ago 🤣🤣🤣!! Nice work 👍.
The same except you have to tilt the part or the air will not let the part pass thru
As a Machinests to get a near air tight fit is very satisfying, especially measuring in microns.
Piston gauges for pressure metrology typically have sub micron gaps. The diameter is precisely known so when loaded with a precise mass, the gas pressure it takes to float the piston can be precisely known. There is some gas lubrication/leakage but it takes enough time to get a stable measurement.
As an old NBS Physical/Dimensional Lab Tech, I know what you mean. Worked on and with a lot of Ruska's back in the day.
we have a plastic mould manufacturing company we maintain for piller bush 15 microns and for inserts 10 microns per side.
The genesis device is now armed
Only worked as a machinist for 2 years but +/- .0002" was our "normal" close tolerance
1 millionth of an inch, Retired Toolmaker
i have seen barrel chambers consistently cut to a tolerance where if you block the muzzle end of the barrel the cartridge wont chamber into battery, unblock the muzzle and it drops right in. company initials are PR
Now try doing that with wood work. My Dad has a fine crafted tea box my great grandfather made about 100 years ago. It's a rectangular outer box with 2 square boxes inside. if you take one box out and put it back the air pressure when its pushed in lifts the other box up.
For some reason in this industry the tighter the tolerance the less money you make.
+/-.0002" on a mill with a repeatability error of ~0.0005" is what dreams are made of
.0002 is the tightest call out tolerance I’ve ever had to hold but I kept most within .0001, working on ID and spherical ID grind operations.
I've worked to tolerances small enough that the sharpie writing would prevent that piece from dropping.
The closest I've ever seen wont even go in cause it's so tight it formed an air pocket and it won't let it in
Not close enough, the marker writing still fits
The tow sound get me insane,not bad too
.0006 is closest I've ever had to follow
My tightest, probably the +-0.00005" on bored holes in 6061 for fiber optic switches. Yep, 50 millionths of an inch. Oh and measured with Deltronic pin gauges by hand/feel. About 20 years ago.
Closer than I trust those mics to measure. Mitutoyo is fine equipment but those mics just not going to get there.
We deal with +/- .0004" (.01mm).on regular occasions. Sometimes +/-.0002. (.005mm). As a QC tech, this looks pretty good to me.
Polish those parts to 8micron with some diamond polish is what I did to those similar PC ,for 13 years I did surface benching lowest I ever got was .08 micron (less than 1.)with H13 50-52 rc
Smooth AF!🤘😎🤘
I've cut meat with my slicer so thin, you couldn't even see it.
Boeing Aerospace Journeyman Machinist here bored about 500,000 precision holes. Looks like a start to me.
50 millionths and those get sorted into 10 millionths
I used to do Layout work, and we had some gages that were so precise we'd have to wait hours for them to cool down to room temp before we could get an accurate measurement. I'm talking like half a micron. Just breathing on them would alter the reading. Funny thing is that they'd go out on the factory floor and get used by operators who would abuse them in twice the humidity and 30° hotter temps.
amazing!
Ever worked down to helium light bands? That's the tolerance on some mechanical seals
I’ve centered wall decor I was mounting to within 1/16” before. That’s probably the tightest I’ve done freehand.
sound familiar when on the bed at night😅
Nice work. To answer the question I used to mass produce components that had a flatness tolerance that was within a micron and gasket heights that were +-1 micron. There is some pretty amazing metrology equipment out there nowadays.
Сотри маркер с сердечника, он 5 микрон добавил. 😂
The smallest I've ever seen on a drawing was 0.0000013 , or 0.0003 mm. We actually ground custom Johnson blocks, stone barely touches and then take it too the zeiss measuring machines
Good work
Turning to the thou. Grinding to tenths of a thou.
The closest tolerances I've ever worked with was when I was 16 years old... Now the tolerances are nearly stroked over size bores.
I made a shaft and a hub in first year machinist and it’s fit is so good it traps air
Impressive. Would also be interesting to see with the air seal broken at the bottom too.
I was hoping the sharpie would stop it lol
I feel like the sharpie hindered the tolerances😂
Did a part today with a +0.013mm today, the challenge was the lath, a very old and not so precise