Вставка
- Опубліковано 29 січ 2017
- The Vernier Scale is explained and demonstrated.
This is part 4 of a series, known as MEASUREMENT in the METALWORKING INDUSTRY.
Produced by Loucks & Norling Studios, for the Federal Security Agency and the US Office of Education - 1941
This digital video was produced from a surviving 16mm movie print by the Museum of Our Industrial Heritage. industrialhistory.org
Verniers are old school and extremely useful. At 63, though, I have to use a magnifier to read them.
I love these videos.
Ignore all the comments from people who state that it is all wrong. All of the videos I have seen here so far and 100% correct in their application. Very little has changed in metrology since WW II, the proper way of using a tool 70 years ago is still the proper way today.
"Ignore all the comments from people who state that it is all wrong. " Truth, and few of those comments are by actual machinists. Those not machinists should watch and learn, or go away.
Thanks for the video!
I used it to instruct my 9 years old son on the vernier scale. Nice and clear instructions. We're back from the shop reading micrometers and calipers for the past 1/2hrs.
Thank you for uploading this video. It reminds me of when I was a young machinist through the 90’s learning from men of this era.
Verniers remain in use today and their principles and use are taught to student machinists. These videos are still useful, because of their high quality, to modern student (and some narrowly experienced professional) machinists.
Really enjoy these videos. I'm 74 and still try to learn something new everyday.
Im a toolmaker, and im pretty happy we use milimeter here in Denmark, it just makes more sence, to me... its potato potato, but milimeters just seems more “clean”
This film is so true and useful for an Apprentice.
Then you applied your Skills and worked different Jobs for Experience and developing your Machinist Skills.
For a Job Shop, Time was Money, every Day after Day.
When you worked in Production, same part, different day
for months and months.
Then R&D, different part, every day for days and days.
Later, if you were good, you worked as an Engineer, Pencil & Paper, until you went into Management. Same thing..."When will you finish the Project?". I enjoyed being a Machinist.
The feeling when I change my mind from metric to imperial is the same as when I speak another language.
9:12 + 3 tenths. That is one tight tolerance. Grinding, yes, turning it you gotta have a straight lathe.
Boy can I appreciate my digital Mitotoyo calipers.
Indeed. Verniers aren't actually difficult to understand but the graduation VISIBILITY sucks. I don't mind using my vernier tools but my Mitutoyo and Tesa calipers in common sizes get far more use.
All those guys in the credits up front. They all have initials for first names. Thanks - Lumpy
It is my opinion that you should disable comments on all of your videos. They are not meant to be open to interpretation they are meant to show us the history of this subject matter. We used to measure with cubits, which obviously isn't very accurate, but it's what happened, and it's fascinating to learn about. This is one of my favorite channels on youtube, and unlike everyone else here I will tell you to keep up the good work and ignore these armchair quarterbacks who don't understand the point of the good work you are doing preserving these videos that we would otherwise never have been able to see.
Thank you, and I hope comments can remain. It is good to have a discussion on the history, methods and differences of opinion. I also hope the value of doing good individual work is noticed and gets discussed. Inappropriate and off-topic comments may force me to close the channel to discussion if it proves unmanageable. We have just recently gained access to a much wider audience and it remains to be seen if I can keep moderating comments. Most have been very welcome, but there are always a few spoilers.
Dustin you are correct they are great videos people should just watch and shut up be thankful for the effort by a thumbs up, would it be so difficult
@@tykellerman6384 Been my experience one can learn a lot from the comments..always going to be know-it-alls and haters but if you look around you can find some interesting things sometimes..my 2 cents
I wonder what the #3 movie was. Calipers, perhaps?
We don't have it. I believe it was about reading scales or gauges.
Thank you for posting this. I'd long wondered about the principle of the vernier; now I think I understand it.
Is the "Tom Watson" mentioned in the credits T.J.Watson of IBM? The Studebaker surely has to be related to the car company family.
John Studebaker was not an heir to the Studebaker auto fortune. Worked his way through college as a bricklayer, and obtained a master's degree in education from Columbia University, He kept his union membership for years afterwards. He died at 102 years of age in Walnut Creek, CA.
Is good to keep this video only for posterity, which is the most important job of any museum or any teacher... but for the sake of any students who see this..... NEVER take a micrometer off of the part and then read it... it must be read while on the part in order to ensure the accuracy of the tool if your purpose is to read the nearest one thousandth or nearest one ten thousandth of an inch... .and never rely on "feel" if you can avoid it.
This film is flawed to the bone... it is only good for the purpose of maintaining posterity; if a man like me walks up and says all the instructional videos from that era were perfect and you need to prove otherwise in order to illustrate that there is no such thing as a perfect era with nothing but perfect or great teachers and great students or any other similar.
thanks for posting this video.. but it should come with a disclaimer.... nearly as much as my posts should come with a grammar disclaimer.
Thank you. I appreciate this kind of comment. Justified objections and additional information will always be welcome. I am forced to delete insults or profanity, even if other good points are made in the same post. Personally, I am not a machinist. My background is in electronic technology and I am today functioning as a historian and digital archivist. Movie film was not made with stable material. Many have disintegrated after 80 years and many you can see here were in fragile condition when I made the transfer. As a historian and archivist, it is the record which must first be preserved. It is the duty of others to comment and discuss the content. Thank you Jim, for taking that role in a respectful way. I sincerely hope your comments stimulate further discussion.
Yes Sir/Mam thank you and yours for your investment in the care of the future of anything any of us work for, claim to love, cry, or bleed over.
Interesting perspective. I watch as many machinest's videos on UA-cam that I can; I'm no expert. However, all of those that seem to be doing the best, most precise, or otherwise most impressive work seem quite content to rely on a very well-developed feel, and to take the micrometer off the part before reading it. If the thimble doesn't turn, the reading isn't going to change. Technique. I didn't see any flaws in the film.
I have to disagree.
Removing the micrometer is perfectly acceptable, and often more accurate because the tool can be held in a manner most effective to getting a good reading, rather than best for seeing the scale. This is doubly important with reading the vernier where being able to look directly down at it is critical.
If you can not use it consistently by feel, then you are not going to be able to use the mic with transfer type gages like snap gages. A skilled machinist will be able to hold tolerances to under a thou with out resorting to very expensive inside micrometers.
I get the sense you are a student with little practical experience.
Hate to break it to you, but this is NOT how to read a Vernier. In this example when the ones line up it is 1/5 of the main scale division, when the 2s lines up, it is reading 2/5 of main scale division and so forth. this training film is giving a misconception of the vernier principal.
This film is was published by the government over 75 years ago. We present it as part of the historic record and not as a definitive authority on metal working practice. It would be our hope that the viewer compares presented information to other sources and develop the best technique for our own times. I will only claim responsibility for making a video copy from the surviving acetate film print.
professormag Hate to break it to you, but this video correctly illustrates how to read a vernier scale. Perhaps there was a misunderstanding. Watch the video again. The mark on the vernier scale that lines up with a mark on the main scale tells you the numerator of the added fractional value... denominator is given by the number of marks on the vernier scale.
All is fair in love professormag.
The "imperial system" is as real as a wife.
I didn't understand his problem either. Probably a first yr diploma student.
@@RandomNumber141 Thanks for explaining that..very concise
Really enjoy these videos. I'm 66 and still try to learn something new everyday. Fascinating stuff
I'm seventy-three and yes, very fascinating. However at four minutes in I had to pause the video and take two Tylenol. I do some machine work and I'm very thankful for my digital caliper.