You are using your calipers wrong! Let me explain why...

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[@davidrussell8689]

It’s humbling to realize that there’s always something to learn no matter how much experience one has . Thank you.

[@danjohnson6870]

I learn something new about this hobby everyday. I’ve been at this decades and still feel dumb.

[@garyspoering2463]

There are those who have blown up rifles and there are going to. Sad to say, but true. We need to keep practicing with our equipment to be proficient and accurate and to BE SAFE. Please take care!

[@nicholasperry2380]

I learned this way back in college then managed to forget it. Instant flash back to 1979. Thank You for bring back memories of a better time.

[@directimpingement8202]

Here is another method that I use and was taught to me by a very experienced machinist. If you want to measure the height of the smaller OD section of that thingy you have, you can start by measuring the length of the larger OD and re-zero your caliper. You then measure LOA and what is shown is the difference or the measurement of the smaller OD section. I realize this is an extra step/re-zero but works great in certain situations.

[@forestfishburne7900]

This is common practice with digital calipers when measuring distances between features, such as the distance between holes…if the holes are of the same size…like a bolt circle. You zero on the id of one of the holes and measure the outside distance between them.

[@tomfull6637]

Mine is analogue..

[@YahWho-is1tt]

@@forestfishburne7900 Pretty much what I came to post - except that I was thinking of finding the center-to-center distance of objects like bolts (or pins, but again OF NECESSITY of the same OD), in which case you measure the OD of one pin and set your zero, then measuring across the outside of your two posts would give the O/C measurement. BE SURE, though, to RESET your ZERO when you're done!!! (don't ask)

[@ranbymonkeys2384]

The reason for that is the claipers don't have a radious in the corner and the part does. So if you are putting the non radious corner onto a radious to measure you wont be accurate.

[@YahWho-is1tt]

@@ranbymonkeys2384 Who are you addressing, and what are you talking about? ? ? ?

[@randyshoquist7726]

When I got my first Mitutoyo caliper 40 years ago, "four-way" measurement was an advertised feature. I believe Mitutoyo claimed to be the originator. Now that most calipers have that feature, many people don't know about it. Go figure.

[@monadking2761]

Nice job showing the 4th use of that slide calipers. My background was in calibration (Metrology) and here is a trick don't hold things in your fingers to long. The heat from your fingers can affect the tolerance too. Some of the items that we had to measure we had to wear cotton gloves because the oils from your fingers would affect the measurements. Always note that the standards are at a certain temperature which is critical and humidity as well. Remember your gage blocks should be certified periodically too.

[@martintheron1386]

Our measuring office was constant at 20°C.This temp keeps molecules in steel constant - nil expansion nor contraction

[@peterfitzpatrick7032]

Thats why some mics have plastic tabs on the frame to hold 'em by, so you are minimising heat-transfer... 😎👍☘️🍺

[@peterfitzpatrick7032]

@@martintheron1386 Martin, more importantly , its also because all measuring devices are calibrated at that specific temperature...

[@geraldstewart]

Well stated MonadKing, I was a Metrologist for 28 years, USAF, Tracor Aerospace, etc. Gauge blocks also come in different grades. No device is exact everything has a tolerance, even Gauge blocks.

[@garyspoering2463]

Standards also!

[@RatelLaw]

You’re correct, I did not know the forth way to use calipers. Thank you.

[@randyemenhiser2573]

Fourth

[@Halfmilesniper]

I agree, thanks for teaching me something new Erik.

[@CorwinBos]

Same here. I feel really dumb now :)

[@hollyfoxThe]

Me neither. Good to know.

[@bobgarr6246]

I thought this was obvious.

[@coplandUSA]

It's only when you seek answers that you realize how little you know. Thanks Erik!

[@hotchihuahua1546]

Amen !

[@davedegaetano188]

@@hotchihuahua1546 man polo NCFC look I’m numb B

[@TopCat2021]

I love your reply I may have to use that in the future as it is so true.

[@bigsmoke6189]

It's actually in the instructions that come with the calipers and has done for as long as I've been an engineer (47 years ) but guys never read them !

[@1crazypj]

He didn't try and explain how to read a vernier though, they are (or should be) accurate to 0.001" ;o Electronic are not usually as accurate as 'real' vernier, just easier for people too dumb or lazy to learn how to use them. I have 6 pairs and they all give consistent results (except the 2 electronic ones)

[@bigsmoke6189]

@@1crazypjyou're dead right, for quick measurements of parts digital verniers are fine especially for older eyes but its got to be a Mike for machining and quality control .

[@subjectofgov]

Guilty.

[@nemocacihlas4876]

L0l

[@rickhoey4843]

I’ve known about the the fourth hidden feature for 45 years. It’s called step measuring.

[@patpalermo7629]

adjusting the slop in the display head is very important as well. There are two screws at the top that need to be snugged up against the rail of the caliper so there is no movement in the jaw. this makes sure the jaws are always parallel and will improve your accuracy.

[@rickymeadows3763]

Great info, been machining 40-years , still drop by these vids to maybe learn new tricks. It is amazing now-days to see kids graduating from machining trade schools whom have been well trained in the digital world but can't read a pair of Starreet dial micrometers. Salutations to you guys out there who makes these type of instructional vids !

[@colinweir5807]

As much as I agree with you, it is what and how they are taught. Try them with a manual / non digital vernier.

[@dentwatkins2193]

@@colinweir5807, vernier refers to the analogue scale. Digital calipers are just that, digital.

[@rickymeadows3763]

@@alfa-psi Well, I said I was a Machinist , not an English teacher, LOL !

[@nomen.nescio]

You are using your calipers wrong. You're supposed to switch them to metric before using.

[@pauldeahl3980]

I worked in a machine shop for 10 years and it never dawned on me to measure a step that way. Thank you!

[@martincart2775]

I knew this one. My boss's dad taught me that while working in a waterjet cutting shop. He was a machinist from the late 60's to early 2000's. Taught me lots of old school tricks.

[@rapidrrobert4333]

And I have been using calipers for decades! Thanks for the humbling advise.

[@hoo-t]

Method #4.... another WOW moment! You pegged me. I've always used the tip and even realized that it wasn't really suited for that. Thanks again!!!

[@Suck-Squeeze-Bang-Blow]

My Idustrial Arts instructor taught us this, he was a great man, he was the same man that taught my father how to weld in highschool.

[@Joel-vt9mh]

Good stuff Eric. As a QE I was aware of the fourth method, and it’s also a good idea to make sure your instrument is calibrated. Look forward to the video on how you set a f/l resizing die!!

[@scottmedina7365]

I was a machinist for six years I knew this was the step you were going to show an old timer at my old job taught me this technique

[@sferg9582]

I'm a retired toolmaker, and would use a caliper only for the "loose-tolerance" stuff +/-.005. Another useful advantage of calipers is to set the diameter or length of a part's finished dimension on the display and then zero it there. Take a measurement and now you have a means of determining how much to "take off" the material to obtain the finish dimension by simply reading the display... doesn't work on the old dial types of course.

[@ChimeraActual]

It can work with dial indicators if swinging the dial covers the range.

[@PatriotPaulUSA]

Yes, Exactly another thing that saves me from doing math! LOL

[@persimonsen8792]

If your caliper has a outer ring that you can turn. Your idea is still possible.

[@paulsilva3346]

@Sam Bowles Only if you are Ham-Handed, a skilled fab can feel measurements, plus minus 2 or 3.

[@madisonrollings1845]

@Sam Bowles And micrometers can be turned so tight that you stretch the thread. Any precision measuring tool can read inaccurately in the hands of a gorilla.

[@KEIFabrication]

Yep. You were right. I was measuring depth of steps incorrectly. Thanks for showing this!

[@thesaint1517]

Hey Erik. That was a great video on caliper measurements. I just started using mine and you have cleared all my doubts on how to do the correct readings. Thanks!

[@Progneto]

I sure didn't know about the fourth measurement, thank you, I'll be using this all the time now!

[@danmatthews3102]

I have one more: How to measure the distance between two holes, center to center. Stick the pointy ends in a single hole an zero it. Now stick each point in a separate hole and it reads the distance between the two hole centers. (holes have to be the same dia)

[@persimonsen8792]

That is the most useful trick. The one in the video, demands that your caliper is square at the end.

[@palewriter1856]

Aha! I had to drop in to share my own contrived trick, only to find this. I'm a tad fuzzy on your sticking "each point in a separate hole" being at all accurate, but here's how I often use mine: for measuring the on-center dimension of two equal diameter rods or bolts. If you measure the outside diameter, then zero (tare) that measurement out, then measure across the outside of the two bolts or rods. This gives you the o/c dimension, dead nuts. This only works on digital displays, obviously. Plus - don't forget to RESET your ZERO! As for the math: max distance outside less both radii equals o/c. If rods are equal, two radii equals one diameter. So for this to work on holes, you'd measure inside diameter of one hole, then zero out, then measure inside (between) the far edges of the two holes. The problem with that is that in smaller holes it's difficult to get an accurate inside diameter, if not outright impossible.

[@persimonsen8792]

@@palewriter1856 Yes, there are some limitations, on hole size. But if 0,05mm with a caliper is ok, this method works. Most calipers aren't that precise under 0,05mm

[@rickhoey4843]

You can find the center line on two holes with different diameters. You just have to calculate radii of both holes.

[@palewriter1856]

@@rickhoey4843 Of course -- but the point of my method was that it takes no claculation, for the math-challenged.

[@Anonymous-it5jw]

Great video; thanks for telling us about the 4th way to measure with calipers and the other stuff we had no idea about. Glad I cleaned up my vintage micrometer.

[@davidstuck2866]

you know what, I know you are a busy man, THANK YOU SO MUCH for taking the time to teach everyone the "tricks of the trade" so to speak. my brother was a full time machinist at times in the aerospace industry, and he never showed me that trick (the back of the calipers). Thank you for all of the information that you are providing to all of us.

[@klacustoms]

Here's a method that works extremely well for referencing. Scribing. You can take one end tip of caliper that you take outer diameter measurements and place it on the end piece or edge of part. The other end of the tip, set for how long you want, lets just 1inch. Lock caliper in place. You drag the caliper either parallel or perpendicular with lightly putting pressure on surface of material to leave a scribed mark while moving along the edge. Now you have a 1 inch scribed line from the edge of the part. The tips on top that are used for measuring inner diameters can be used for scribing circles as well if you have a starter hole to begin with or scribe next hole location. Works great for referencing if you need numbers fast with location points and all you have is a drill press to work with with no read out and you have to do everything by eye. I would use calipers like this if they are worn out or are cheap throw away. Don't use your good calipers for this. I use this method all the time around the house on projects.

[@howtoshootstraighthtss4948]

I am glad u told eveyone about the calipers accuracy, I am a machinist and thats common knowledge for a machinist, but when i tell a reloaders they dont belief me.

[@keithlucas6260]

Toolmaker for Baker Hughes...we play in half thou or less. .005 is wide open

[@The_Machinist91]

I was just writing the same comment then saw this lol watching people saying theyre getting accuracy within .0005" with these $20 Chinese calipers makes me laugh

[@vdog4799]

I would never have known that. I've never worked in machining.

[@howtoshootstraighthtss4948]

Vince Cartwright glad u do now thanks to eric cortina, I told my friends, but they dont belief me.

[@howtoshootstraighthtss4948]

Seth Leininger lol yeah, i used to work with $200-$500 mitutoyo calipers when i did quality control, and we only used them for quick reference. Always used micrometers.

[@grumpyt3169]

Thank you Erik, this was an eye opener. Life is a learning experience.

[@keithmarquardt7025]

Really cool! I'm a QA guy in a stamping shop and it nice to here someone that knows what they are talking about. We use calipers for inspection but only for things that are +/-.005

[@arthurhilgendorf1211]

One gauge block is handy for a spot check but you really need a series of blocks to check across the range of the instrument. Another thing to be aware of is the heat from your hands will affect the readings over a period of time so gloves may be needed if the measurements being taken will take some time. Good video.

[@Cr4sHOv3rRiD3]

Gloves are heat conductive as well and it is pointless to use them while measuring. Considering the accuracy of calipers, you don't need any gloves or take in consideration any heat deformation etc. Calipers are designed to take the measures of an object in 0.01mm accuracy, even the analog one if you have a good eye you can read the numbers at 99.99% accuracy. For the tolerances used in mechanics those are more than enough tolerances to be able to reproduce the dimensions of an part. Anyway, if you want to be more accurate than thousands of an inch or millimeter use micrometers and other equipment but not calipers. For me as an mechanic over 25 years of experience and lot of knowledge, I use calipers almost blindfolded and within accuracy of 1/100 of an millimeter and that's pretty much enough for the job that I do. But anyway, environmental temperature can cause the changes from original dimensions, and it is recommend to use the caliper in mostly room temperatures for precise measuring. And the steps will be to leave the caliper and part you want to measure in room temperature for a while before taking measures. That is the practice that I've using all my life and it is proven perfect because all the parts which I want to replicate are built at those temperatures during production. You can also take at the part specifications and check for the temperature environment during assembly. Only hands and heat from the body will affect the measures but not in huge a way, it will be in micron difference which is not important if you're using calipers ;)

[@t.hargrove3843]

Never knew about the 4th way, have just always used the depth gauge. Thanks.

[@willo7734]

Really great info. Thanks for this. It really helps a guy who is trying to muddle my way through learning this stuff at home. It’s amazing how the more you learn the more you realize that you don’t know. That’s where the fun is though.

[@kentac1911]

I never knew that. Thank you for sharing! Little tricks can sometimes make a huge difference!

[@wilsonlaidlaw]

A lot of good quality calipers like the Moore & Wright ones I use also have a difference between function. That is what I use for measuring steps. Measure the shorter length from the base to the step, lock the calipers and press the difference button. Then unlock and measure the longer length. The new reading is the step height.

[@TTiger86268]

Received my machining degree in 1992 and you would be surprised how many people do NOT know this.

[@dirty_dutchman2558]

just showed an engineer how to do this today!

[@gregriutzel7834]

Good to know. My Starrett instructions show that shoulder used for parallel lines layout. Great presentation!!

[@markr6754]

I started using calipers just 2 1/2 years ago...so I have a lot to learn. Now I know 4 ways to measure. Thanks for the instruction.

[@barryoakes5976]

Sir,, I have learned more from you in 3 days than I have for the last 6 months learning how to reload. I truly can’t thank you enough. Most of what I learn from the other sites doesn’t make much since.. but the steps you have lined out make perfect since to my overly filled mind. The only thing I need to get around though is the first step because I have no chronograph.. but for the plinking kind of shooting I do that’s no big deal. The rest I have learned will keep me safer than I would have been chasing the group. And safety is the most important, so again.. Thank you

[@ErikCortina]

Google: Erik Cortina load development method. You’ll see how to work up a load without chronograph

[@redleg1013]

@@ErikCortina thank you ! I never knew this jem existed. I had always done Audette development and did seating tests from there.

[@barryoakes5976]

Erik Cortina , will do sir,, thank you

[@linemen71]

Love that fact that you didn’t edit out the light Turing off! Hilarious

[@silentbob267]

I laughed pretty hard at that part

[@bkvdpw]

Yeah, and apparently there's a reloader's term for, "Oh, goodness. The light went out!". I think it was, "Son of a !!!" but I couldn't tell for sure. :)

[@ErikCortina]

bkvdpw 😂

[@ErikCortina]

I said “you fantastic piece of quit”. 😁

[@linemen71]

Erik Cortina of course there’s no way you would have said “f****** piece of s***” I would never accuse you of saying that 😂

[@rout9291]

Thanks for the wisdom just learned something new! Great job Big “E”!!

[@spammerwhammer5526]

It's true - you really do learn something new every day! Thanks for posting this.

[@markthegunplumber8376]

IMO and i've been a Gunsmith and Machinist and a certified FAA incoming parts and overhaul etc. inspector in the last 25 years. all calipers should have a foot on them and all mics should have a stand for them to make them more versatile and if you're going to be using measuring instruments as much as some of us do. a person should buy a Jo block/gauge set and maybe even a small granite surface plate so you can do your own metrology. the older i get the more i drop things. if i do drop a caliper etc. i can go to the inspection plate with the block set and establish if there was any damage in a few mins. gauge blocks need to be handled with cotton insp. gloves and coated with the bee's wax provided to prevent them from staining and developing corrosion from the sweat/salt in your hands and the heat from your hands will make them grow as much as .0003" or more. our metrology lab was kept a 68* +/- 2* at all times to keep all parts and instruments bathed at the same temp. to keep parts from growing from heat. love the vids Eric keep them coming. cheap measuring tools are like a cheap motorcycle helmet. how much is your head worth to you. that's how much you should spend on a helmet.

[@thenewBH]

15 year career machinist from DOD to medical to aerospace toolmaking to race engine design and building...if you're using calipers for anything in aerospace, you arent in aerospace. Calipers are tape measures, no more.

[@gravyblue]

We call calipers 'approximeters'

[@Johnny-jr2lq]

thenewBH I’m not trying to be uppity or a smart mouth. Because I’m so green to reloading thing. But I feel that calipers are the prefect tool for the reloading hobby. If I’m wrong please school me on something you feel is better for the purpose.

[@markthegunplumber8376]

@@thenewBH true. just like every carpenter has a tape every A&P has a caliper. when i worked for the Big Orange Helicopter Company we had rules as to what instrument would be used to measure each part. but, i will say i have bought in truck loads of Sikorsky surplus parts with a caliper and basic measuring instruments. there are around 60k parts on a CH-54 and only a small percentage of them are CMM etc. worthy. most everything else is panels, blade spars and pockets, bubble windows, and air frame parts, gaskets, landing gear etc. basically on those the tolerances are't overly tight and the paper trail and material certs and C of C is of the largest concern to the company. obviously engine parts, MGB and TGB and fuel cell parts are critical. if people really knew or saw how an aircraft is assembled or repaired sometimes they'd be more apt to drive somewhere rather than fly. i spent over 5 years sitting in a small air conditioned room with two CMM's and 4. other guys and a large surface plate measuring and buying in or rejecting either new, surplus or rebuild parts and writing QARs 10 hours a day. i probably rejected more than i ever bought in and our job was to find something wrong with each part. much to our suppliers or machinists dismay i may add. we didn't pay our suppliers until the parts passed QC and when they complained when we QAR's them or only did a partial buy in and put their parts in quarantine lockup till they grew dust on them we used to say "when all else fails, just make the parts to the F$%^&ing print"

[@LTVoyager]

thenewBH As a retired engineer who is currently building an airplane, I will say that not everything in aerospace needs to be measured to 0.0001” or better. Different jobs and applications require different tools and calipers are perfect tools for many applications.

[@halfbeardsilvertongue5129]

Jeeminy Christmas! So obvious AFTER the fact of being shown. Thanks so much for the knowledge, sir! I've used calipers for awhile on things that needed to be close, but never realized about the shoulder ability like you just showed. Thanks again!

[@prestonburton8504]

for over 42 years i have been using my calipers incorrectly! although i'm used to getting shallow depths the standard way, your method is superior! my first set of digital calipers were a very expensive 6in brown and sharp 1982. Thank you SIR!

[@markanderson8066]

I got up from the kitchen table, down to the shop and immediately tried it! Thank you for that hidden gem!

[@markgoostree6334]

I've watched lots of your videos. I think you've forgotten more about this reloading hobby than I'll ever learn! You really do good for the reloading fraternity. My ammo goes bang, my guns function on it, I get holes in the target, but I'm not ever going to get the accuracy you achieve. Still, its a fun hobby for me and I like shooting my own ammo. Keep it up,man!!

[@EvilAdonis]

If you look on the back of a lot of old vernier calipers you will see two circular indents, these are meant to set the distance of spring dividers.

[@leefalk3914]

I learned something today. I’ve used them for several years and didn’t know that. Thanks.

[@musclesmouse]

Funny I was using my calipers yesterday. Ty, I’ll be ready for steps.

[@halbogatz3780]

Erik, Thank you for taking the time to make these very informative videos. As a former CNC machinist, gauge blocks are accurate at 68 degrees. Merry Christmas.

[@ramsaycountry1177]

Awesome Erik, We want to see your start to finish brass prep.

[@jakedobbins1472]

Used the "4th" way to measure today! I didn't know! It came in handy! Thanks Erik!

[@jgordey300]

I have the same caliper and love it. Always great info on this channel!!

[@thebigdl1]

Do you know the other 2 measurements that can be taken with those calipers? The angles on the tips of the "OD side" are 100deg, most metric counter sink angle for screws... Th "ID side" are 82deg, most imperial counter sink angles for crews.

[@PatriotPaulUSA]

Nice I didn't know that one!

[@DomManInT1]

And the beam of the caliper and any one jaw is 90 degrees. Who knew? A small machinist's square.

[@felixar90]

I assume that feature is actually dependant on the bran and model because my Mitutoyo have round tips on the OD jaws and entirely round ID jaws.

[@pauls5745]

I thought we use 90? thats the most common countersink bolt I have and bits...

[@ranbymonkeys2384]

most metric couter sinks are 90 and standard (US)is 82 just like a center drill, well common center drills.

[@dougberrett8094]

Very good. Been doing it since 1970, but then not all sets had that feature. If you need real precision, buy and use a set of gage blocks. Set the dimension you need with the blocks and then see if your calipers tell you the same number. Sometimes the gauge blocks are called Jo blocks.

[@stevek3036]

I have been using calipers for more years than I can remember and never knew about the 4th use! Thank you very much for posting this video

[@audiogod2929]

I have learned so much from you in the last 3 months of watching your channel . Thank you sir

[@padraicmcguire108]

Been a casual machinist for 40 years and never knew that feature! Thx so much

[@HepauDK]

1: Remember to read the instructions for the gauge block. It should be withing a specified temperature range when used (usually around 20°C/~68°F if I remember correctly). Keeping it in your hands for too long will warm it up to a point where it is no longer 100% accurate due to thermal expansion. The same applies to micrometers. The frame is usually insulated, but it shouldn't be held in the hands for extended periods of time. These things are super-sensitive. The relatively high tolerance indicated in the data sheet is probably due to expected thermal expansion/retraction. It should be accurate at 20°C/68°F. 2: My 450mm (18") Mitutoyo vernier caliper (160-128) does not have any depth gauges. ;) 3: I did know about the 4th method, but haven't used it much due to its limitations. if there is any amount of curvature at the bottom of what you are measuring the depth of with method #4, you will have to tilt the caliper anyway. That's why the depth gauge has the notch at the tip.

[@millomweb]

Yes, a guy talking about accuracy handles the block with bare hands ! Pretty sure my VC doesn't have a depth function either - nor stepped jaws for method 4 ! In fact, for measuring i.d. I have to add 0·250" jaw thickness ;)

[@aminormaximum2446]

@@millomweb Ever notice how some people just have to always feel superior? I believe that do down, it has to do with insecurities. I am not an expert, however. 🤭

[@millomweb]

@@aminormaximum2446 I think that's just your opinion. I like superior people. I've had far too much of the junk already - which is why I prefer animals to people - as they're often better behaved.

[@jamesyoung7560]

lol! you beat me to the bodyheat thing :)

[@MickeyD2012]

That's actually pretty helpful, to ANY beginning machinist. Thank you sir.

[@jeffmetaldemonz]

Cheers man, I didn’t know that 4th one either and been using vernier calipers for 20+ years haha

[@joeritter8331]

I went to mechanical enginerding school measured a boat load of stuff had to learn basic machining skills and never learned that. Side note: I watched your don't chase the lands video. Found a little direction in it, then loaded up some AR food with your COAL test method and found me a fat accuracy node that nearly halved the best groups I'd ever shot with it before. If it stays consistent like that I'll be stoked. Thank you sir!

[@CatsSwordsAndCNC]

Ahh yes stacking tolerances, the bane of precision.

[@philmachineman8927]

@Bertie Bollocks Not So. Accumulated tollerences, is a lame excuse offered by a metal worker who failed to use his most important tool. HIS MIND. If you do a build that has 4 components stacked or chained together. You assign points of validation, that you rule in or out based on your understanding of the dynamic or characteristics or range of use of your build. In real estate they say location location location. Building "fine" things..... It's ALL about, validation, validation, validation. Your machine / tool. Your measuring tools. Your info, or data. Blue prints / sketches. Who desinged it. How was the limits and tollerences for your build 9kkkdetermined. Temporature of everything Direct sunlight. Wear or breakdown of cutting tools. Nothing assumed. Your grasp of all this, and more, is What will build acuracy into your work. And calipers are NOT prone to inacuracy. How they are used, and handled IS. One moving part! No "feel" reqired like with a micrometer. You don't use your thumb nob to set the jaws for a read. You close the jaws on the intended surfaces, by squeezing the outsides of the jaws, with your fingers. In a digital caliper, the reading head is actualy reading half of the minimum single increment displayed. Cool!. Use it right. Develope consistency, and keep the slide clean and well adjusted.

[@HepauDK]

@@philmachineman8927 Indeed. Using the thumb knob will get you the measurement you desire based on the amount of pressure. :P

[@davidfreese7681]

Good info Erik. I use my calipers alot and didn't pick that extra feature. Thank you mate.

[@vdog4799]

I i.didnt know either. That will really make a difference thank you!

[@kerbyfab]

🤯 I have been schooled yet again! Thanks Erik.

[@MurraydeLues]

The fifth one is mentioned below but it has another use. When making multiple parts, zero it on the master and all others that are measured give you the difference +/- Lot easier than trying to do the numbers, it does it for you..

[@annakquinn7084]

That is not a 5th, is a technique to use it as a calculator or slide rule.

[@MurraydeLues]

@@annakquinn7084 These calipers measure, therefore the 5th is valid as it is measuring difference.

[@annakquinn7084]

@@MurraydeLues no, you even can do that with a regular ruler. Is not a way to measure, is the intended design. Mitutoyo, Starret and Fowler documentation contradict you.

[@MurraydeLues]

@@annakquinn7084 Yes you can measure with a ruler, but it will never achieve the speed and accuracy of this method. You have obviously never used them this way, so there is no point trying to even attempt this. Please continue in your little dream world.

[@clydeowens8014]

Learned something new today I never knew. Thank you for another awesome video. I have learned a lot of new stuff watching your channel.

[@davidschwartz5127]

Wow, I been using calipers for 50 years and did not know that way. Thanks for the tip, plus the gauge block too.

[@edwardriggans4743]

Calipers should never used for precision measurement. When calibrated they’re considered to be acceptable when they read within 1.5 times their least resolving division. In this case that’s +/- .00075”. And you really should use rubber gloves when using gage blocks/pins/balls.

[@howlinhog]

Vernier scale. Old school, still the most accurate, reliable method with calipers. The only drawback is my 59 year old eyes have prompted me to put a magnifying glass in the case.

[@fortnex9972]

Here 52 y.o. :-)

[@frankconley6321]

Yup, a good strong glass in mine.

[@joshm1636]

Invest in a set of dial calipers. Same accuracy but way easier to read.

[@rickhoey4843]

I have 2 pair of them. I have to use an eye loupe to read them now LoL

[@joshm1636]

@@howlinhog I never said a dial is * more * accurate, just that they're easier to read.

[@Graham_Langley]

Now I've seen it I've a feeling I may have been taught it when I did a machining course some 40+ years ago. Many thanks for refreshing my ageing memory.

[@garyhammond.greatinfo.9225]

Thanks again for your expertise.

[@R2_D3]

Also wrong use; Using them as scribe tool......DONT! Also wrong use; Using imperial instead of metric!! :P

[@paulcrumley9756]

So when I'm working on the airplanes I worked on for 42 years, I have to take the conventional (NOT IMPERIAL) unit measurements in those hundreds of thousands of technical data pages and convert them. . . I get it. Smart.

[@R2_D3]

@@paulcrumley9756 Hahahah that would be a B.!!! But I do think working in Metric would be a lot more sensible and faster then using, 3/16...and so on, fractions... But héy, I get it, if everything has always been a curtain way, it's almost impossible to switch.. You didn't notice the :P ? :)

[@k5blaze84]

Metric is the devil! 😈

[@R2_D3]

​@@k5blaze84 The Metriconspiracy!

[@macadamia1966]

the best use for a Harbor Freight calipers is as a scribe tool... they pretty much suck at everything else... (-:

[@Lemming1970]

Loving the comments.... "I'm and engineering and I've know for 40+ years".. No shit. I'd suggest that this video is more for those that aren't engineers, Maybe model makers or 3d printers. If you've been an engineer for 40+ years then this is kind of basic stuff. I mean like I've only been an engineer for 34 years and even I knew ;-)

[@finallyitsed2191]

.....actually, you must be a mechanical engineer. I believe civil, chemical, electrical, and other engineers can benefit from this "fourth" means of measurement. I've always used the depth rod to make shoulder measurements and now know a better way; so there ya go. And I've been at my job almost 44 years. I think everyone should learn something new every day.

[@GraemePayne1967Marine]

I worked in calibration labs for something like 25 years, and another few years performing accreditation assessments - and even I learned a couple of new things. Granted, my work was principaly on on the electrical-electronic side of metrology, but I had to learn some of the physical-dimensional side as well. Partly to know how to use dimensional measuring tools used especially in microwave systems; partly because of personal interest, and even more when I started doing accreditation assessments - because I had to know at least enough to detect a plate of BS when it was being thrown at me. The knowledge also helped while being a co-author of ASQ's Metrology Handbook. But still never knew about using the back side. (I knew about the difficulty with the depth bar when the tail of the caliper is not fully supported from personal experience ... )

[@GraemePayne1967Marine]

@@finallyitsed2191 One of my own personal goals - try to learn one new (useful) thing every day.

[@steverose3324]

Thank you for the education!

[@OhioCruffler]

You were right, I had no idea. I have been trying to figure out how to measure front sight height on pistols. Now I know. Thanks!

[@jackfrost2146]

Been a toolmaker for 40 years---I call calipers "guessing sticks." Another use of this feature is for accurate marking out from an edge. Simply set the measurement and place the shoulder of the slide on the side of the workpiece and scribe across the end of the caliper.

[@ErikCortina]

😂

[@Tuckaway]

Thanks Erik, I've been using calipers for 57 years and not known about this feature. I guess it was hiding in plain sight.

[@buddybbuddyb3687]

30 yrs. for me in a hydraulic cylinder repair shop

[@tomj528]

I learned something new today, which I always love to do. Thank you!

[@rentabomb]

You can also use the fourth method to mark a horizontal line that is a fixed distance from an edge. Just run the caliper up and down with a marker resting on the end of it ;)

[@privatezim3637]

Ok so... imma be that guy. First off though, really been enjoying your content since i found you last week. If I didn't respect you and your competence i would not be bothering to type this. If your calipers are not reading 1.0000 on a 1" STD they are either not zeroed correctly, you are not applying pressure properly (i.e flat and the same as when you zeroed) or they are trash. That accuracy rating is +/-.001 over the 6' range of the tool. So it should be +/-

[@ErikCortina]

Thank you.

[@cntryby]

All these comments and this is the only one that didn't leave me wondering about the future of humanity. Light consistent pressure, with wiped jaws should provide */- .0005 accuracy. (Still use mic's for critical parts.) In fact, in instances of measuring soft materials, I have found calipers to be easier because I can feel the material better than with mic's because the clutch hinders feel... to a certain degree. I thought some of ya'll may find this funny, when I first started machining, I made parts for cigarette vending machines. Can you imagine having those around... lol , how old am I? We made a lot of other things too. mostly sewing machine parts. Did that for five years then moved to another company and manufactured contact lenses.

[@macmac2584]

I've been hammering nails in with mine for years. How dare you say I'm using mine wrong.

[@cmwood6959]

Exactly, and I guess using a mike as a C clamp is frowned upon

[@forestwinter1021]

@@cmwood6959 "Calibrated" c-clamp mind you.

[@HepauDK]

Calipers doesn't strike me as very effective hammers. Unless you have a big-a** one like my 450mm Mitutoyo 160-128. :)

[@dond5103]

I open the jaws and use them as a seal puller.

[@jamesyoung7560]

Mine double as a locking precision adjustable wrench!!!!! :)

[@chrislettenmaier6822]

Thanks for the info for people that don't know about calipers I knew but every few know.

[@Tex_Prepper]

Thank you! Did not know about the 4th method. I only have some old brown & sharp dial calipers that I use. They are accurate.

[@chavakano54]

No matter what age, you learn something new every day!

[@greasegun1313]

I have been a machinist professionally for 20 years and it amazes me how many machinists don't even know this.

[@D70340]

Yup! Tool Maker Basics 101. Anyone who dosent know this already probably shouldn`t be using them. I`ve been a machinist for 40+yrs, this is one of the first things you are taught... how to use your measuring instrument's.

[@greasegun1313]

@@D70340 I dont know if you have had the displeasure of training any recent tech school grads, but it is sad to see that they are graduating students who cannot effectively use their measurement tools.

[@jacquesvandenberghe5518]

superb explanation Erik, keeping it that simple is so refreshing..., go on Erik you'r doing great, kind greetings from Belgium

[@emmettdibble8404]

Thank you! Never thought about the forth one!

[@tom87pate]

I respectfully disagree. Calipers are accurate within plus OR minus .001" because you can't be off your dimension by plus AND minus one thousandth of an inch (unless you're dead nuts on the dimension.) Thus, they are accurate within one thousandth of an inch, not plus or minus .002" As a machinist, I often take out a bunch of random gauge pins and lay them on the bench in any order. Every time, I can easily arrange the pins in order from smallest to biggest or tell you exactly what gauge pin I have just by measuring it with my calipers. Once again, I'm not trying to be disrespectful, just a little more precise in describing the accuracy of calipers. Also, I'm FINALLY so glad to hear somebody talk about the .0005 resolution on digital calipers and how it's a marketing gimmick. I've been debating this point with some of my younger coworkers for a couple of years now. Just because it reads in half-thousandths doesn't mean it's accurate within half-thousandths.

[@lordofthewoods]

I used to be able to "read" .0005" on verniers, back when I could see, i.e., you have two hashmarks equidistant from alignment/neither perfectly aligned. Worked with a 60-incher in one shop; THAT took some finesse : ) At an automotive shop where I once worked, we called them "venereal clappers" : )

[@tom87pate]

@@lordofthewoods I have never heard them called that, but I have heard them called "very near" instead of vernier. I've got some really expensive vernier calipers, but I can't see the damn things anymore.

[@lordofthewoods]

@@tom87pate: Right there with you... I burnt my eyes while welding 20 years ago (thanks to a supervisor sand-bagging my efforts to get our welding supply rep to bring me an auto-dimming helmet), and went immediately from being able to "read the Bible on the head of a pin" to "can't see crap" : )

[@slowpoke2067]

after being a tool maker for the last 35 years i know that calipers are not for precision measurements

[@DomManInT1]

But you can use a caliper as a comparison tool for extremely accurate measuring down to plus or minus one ten thousandth of an inch.

[@pauls5745]

yup.. get out the surface plate, height gauge and mic

[@D70340]

@@pauls5745 LOL, yeah like every reloader has those items

[@tommoss2005]

Well, as they say, you learn something new everyday. Thank you Erik.

[@aznative_]

Hot damn I've been doing it wrong on the outer steps! Thank you for the pro tip.

[@manolisgledsodakis873]

Forget Patreon; they just dumped a few dozen channels because.

[@justinromang9113]

..Freedom and Love...? .. :-).. All the Best. WISDOM GUIDANCE STRENGTH SHIELD

[@mazkact]

I've been a professional Machinist for 35 years and never thought or heard of this fourth way, I'll try it.

[@DomManInT1]

Yeah. Usually takes a Master Machinist to know these things.

[@zekethefishgeek8690]

Or a Master Magician...

[@jasonwoods7665]

Thanks again Erik for the video, I also didn't know about that forth measuring method. Learn something new everyday.

[@josephsessaph.d.3575]

I appreciate the tip. Was not aware.

[@joshuareed3999]

Pretty sure my stuck calipers are causing warped rotors, leading to shaky stops.

[@williebulletman5217]

Know I have to say that’s funny

[@GravityRoller]

Sounds like your calipers are indicating that your brakes out of spec ;-)

[@HepauDK]

They are definitely way past factory tolerances. :)

[@nickwashburn723]

I'm a journeyman machinist. There was a day I didn't know about this. Use it all the time at work. Calipers shouldn't be used for anything tighter than +/- .003. Anything tighter than that you should be using a micrometer or some other sort of inspection tool that has a much higher accuracy. People don't realize how inaccurate they can be. Super handy tool. Not trustworthy on any tolerances tighter than +/- .003. Period.

[@freedomisgolf5816]

I just watched this for the second time keep them coming I’m learning so much

[@JessicaRyan7of9]

Thank you. I did not know this. Very much appreciated.