Invented in Sweden in 1896, these this have been blowing minds ever since. I experiment with them to see how they work and test out if the explanations make sense. Accurate to within a blond one ✪►https://www.etsy.com/ca/listing/464202928/one-rule-to-ruler-them-all-cheeky-jokes◄✪
Russian Machining Channel http://www.youtube.com/channel/UCb9_Bhv37NXN1m8Bmrm9x9w
Russian Machining Channel http://www.youtube.com/channel/UCb9_Bhv37NXN1m8Bmrm9x9w
If the materials are similar, and a multitude of the atoms' electrons are in close proximity to each other, the atoms of each piece tend to lose their tendency for physical independence, acting as if they are all part of one piece of material. In other instances, where the flatness is not so prominent, other materials, such as oxides, contaminants in the form of oils, and air itself, degrade this type of adherence. Vacuum is not a factor.
Johannson invented them and the old timers would just call them Jo blocks but the proper name is Gage blocks.
They are lapped to a high grade of accuracy , not polished. That precision flatness makes them stick together.(no air can get between)
They are expensive with the Chinesium maybe a couple/three hundred a set.
A top grade ( there are different grades of accuracy ) from Starret is closer to $1,000 a set.
Every machine shop has a shop grade one in the shop and a higher grade just for inspection.
The accuracy of these are measured in the millionth's of an inch .
The accuracy is traced and certified to a national standard. ASME
You can use these to check your measuring tools, setting up magnetic sine plates for grinding precision angle on a surface grinder.
They are typically used to set the height of dial indicators checking parts on a precision granite plate.ect.
I was a toolmaker for 45 years and used these often as a part of my job and at times needed accuracy down to .0002" with parts.
A human hair is around .0015" .
Gage block accuracy goes out 6 places past the decimal point depending on the grade.
You need that as there is some tolerence stack to take into consideration wringing many together and you still need to maintain a 4-1 rule on accuracy.
Tools like these helped me to verify my accuracy.
My Good ol' Granpappa used to manufacture johansson blocks for a while, super chuffed someone else loves these
If you want to see wringing force, try it with 2 optical flats lol
Chinesium haha. I've only heard my dad say that. Always makes me laugh
You can also do this with fresh hard drive platters. I have a few that I rung together years ago and are still stuck.
Hard drive platters will stick together due to this phenomenon also
Bought a old set on fb marketplace and if they don't stick together someone's getting summer teeth
Today I went back to this video to use as an explanation as to how AMD's 3d-Cache works. Honestly thought it was soldered, my mind was blown when they said this was the method.
Jesus. Science. Having been a polydunce in school (and to this day), I've nevertheless developed a later-life interest in physics/engineering. I'm late to the party here but thanks for this; pitch perfect for me and I do love a bit of emphatic swearing. Cheers!
Original Johansson Gauge Blocks (son, not sen) could hold 120 kg pull. And that what this C. R. Johansson that made inch 25.4 mm, exactly.
The author talks exactly like historian Indy Neidell. But the last is from US, not Canada.
Vacuum. It’s been solved.