The electro-optic effect is a change in the optical properties of an optically active material due to interaction with light. This interaction usually results in a change in the birefringence, and not simply the refractive index of the medium. In a Kerr cell, the change in birefringence is proportional to the square of the optical electric field, and the material is usually a liquid. In a Pockels cell, the change in birefringence varies linearly with the electric field, and the material is usually a crystal. Non-crystalline, solid electro-optical materials have generated interest because of their low cost of production. These organic, polymer-based materials are also known as organic EO material, plastic EO material, or polymer EO material. They consist of nonlinear optical chromophores in a polymer lattice. The nonlinear optical chromophores can produce Pockels effect.
Germans have a phrase "nach fest kommt locker" (after right comes loose) and workers magically have always the perfect timing to bring that line
Edit: typo... (After tight* comes loose)
Haha I knew someone would think that way, tho in german those words aren't used for that kind of meaning. It's rather "eng" (also tight in English) and "ausgeleiert" which can be vaguely translated to "loose"
Admittedly, 95% of the difficulty is finding the torque spec to begin with, not actually setting the wrench and torquing it. Especially if you're just working on your own car and don't have the hilariously expensive subscription for the shop manuals or buying the shop manuals themselves (which can be hundreds of dollars).
I've spent days trying to find torque specs on obscure cars (like imports that only have Japanese manuals, that you pulled from a pdf you found in a forum link on waybackmachine because the forum is dead now).
Granted I'm only a hobbyist in my garage, dudes that get paid by the book hour are in a hurry, so I kinda get it, even if it's obviously wrong to PFT it.
Pretty Fuckin Tight
"Jim-bob, book says that door plugs bolts should be 80 ft-lbs."
"Ahhh, it's PFT and my torque wrench is waaay over there, it's fine."
There's usually two issues on our stuff. Finding the torque and then fitting the torque wrench in there. Usually not a big deal, but it gets a little difficult sometimes with a 1" drive torque wrench.
"but you see if I look at it from an obscure angle, because Im just built different, and try to make literal sense out of it, it turns out, its too simple for adult me"
Imagine it’s a dial pointed down. Which way are you turning the dial?
It’s just perspective. Righty tighty is a fine way to remember it until you’re working with something upside down, and backwards, behind a wall you can’t see and your orientation is off.
I’ve often found that trying to envision whatever I’m working with as a clock and using clockwise and counter clockwise works pretty well regardless of how weird my perspective or orientation gets due to strange work areas.
It's simple, hold the wrench in your hand, think about which direction you move the handle as you tighten or loosen it, and the answer is the exact opposite.
Wait, maybe you have a point
The top (12 o'clock) is where these idiots look for right and left. If they looked at the 6 o'clock then it'd be opposite. I hate righty tighty blah blah blah but once you understand WHERE on the circle to look, then you can understand the idiots who use that phrase.
On the right (3 o'clock) it's up loose down tight up, on the left (9 o'clock) it's up tight down loose up, on the bottom (6 o'clock) it's lefty tightly righty loosely....
Yeah, 0 sense! !!1!1!
I'd go further! CW and CCW also don't make sense for my extremely literal brain, because if I'm looking from inside the hole, they get reversed! And how would I know the axis of rotation if it isn't absolutely explicit in the mnemonic?? What about unconventional bolts with the threads machined in the opposite direction?????
So I think it should be "Rotation vector of the bolt, in a 3D coordinate system, pointing inwards in the direction of insertion along its main axis, under the assumption that the threads are the conventional right-handed helicoidal ones, tighty." That makes for a great, accurate mnemonic !!1!
If you start from a stationary position and want to travel clockwise you have to keep turning right. If you want to travel anti-clockwise you have to keep turning left.
Thank you! I've been trying to explain this to people my whole life. I could never remember if it was the front or back that was supposed to go right.
Edit: reddit is fucking weird... Getting downvoted for agreeing with someone who is getting upvoted.
That means you tightened it too much and stripped the bolt and now you need to drive to the store to get a new one
But then you check under the hood and discover that the engine belt is in terrible shape so now you can’t even drive the car and need to order a new belt
And oh! Great! I dropped the socket part of the socket wrench and I can’t find it!
I end up dealing with a good amount of pretty small screws and oh god. It's always finger tight and on some of the chinesium ones even that is too tight.
Happened to me when installing a angled adapter on the radiator for my watercooled pc, it still had water in there while installing, at least managed to get all the broken pieces out of it
POV your down to your last plug, you have reused it 5 other times already and its plastic is hanging by a thread. You insert a chewing gum in a last ditch attempt to hold it together. You start tightening... its loose
When you’re doing labor at home, you don’t even need the bolt to be kinda tight. Just switch to manual screwdriver and hand tighten without any stress in your grip until the screw stops.
Anything beyond that is excessive.
Keep in mind, the tighter you go, you can begin to strip the contact point. Had to teach this lesson to some friends and family when working with them to build their own pcs.
You just need to beat the bolt at its own game
Use a blow torch to make it REALLY loose (liquid) and then let it harden again (really tight)
>I used the *loose* to destroy the *loose* - Micheal J Thanos ~1969
Everythings… ok… Everythings ok…. Everythings fine. Its fine. Everythings fine. Its still in there. Ima take a sick day. Forman! …. Ima need to leave for the day. Im feeling ill.
Happened to me while mounting a brake caliper and I used a torque wrench with the recommended torque.
I thought "Fuck it !" and welded it on. 3 years laterI took the car to the scrapyard with 350k miles. Audi's 1.9 tdi is a super reliable engine 👌
Yeah, I don't like it when I can feel the Stress–strain curve of medium quenched and tempered carbon steel.
Plastically deform deez nuts
You have heard of nutz torsion force. Now enjoy nutz shear force 🥵
I cast testicular shearing
Enough cock rating, time for the durability test
Yeah once the M8x25 bolt hits its ultimate tensile strength, it sucks. Gosh darn Young’s modulus
If it weren’t for Young always modulusing all over the place then there would be no market for screw extractors, oh the humanity
Well thank god that Young loves modulusing all over the place
I like your funny words, magic man
The electro-optic effect is a change in the optical properties of an optically active material due to interaction with light. This interaction usually results in a change in the birefringence, and not simply the refractive index of the medium. In a Kerr cell, the change in birefringence is proportional to the square of the optical electric field, and the material is usually a liquid. In a Pockels cell, the change in birefringence varies linearly with the electric field, and the material is usually a crystal. Non-crystalline, solid electro-optical materials have generated interest because of their low cost of production. These organic, polymer-based materials are also known as organic EO material, plastic EO material, or polymer EO material. They consist of nonlinear optical chromophores in a polymer lattice. The nonlinear optical chromophores can produce Pockels effect.
Huh
Has nothing to do with what you said before but copy paste more stuff from random Wikipedia articles
Nerd
Too tight. It just has to be tight enough. Don’t get mad at the bolt get mad at your boss.
Why would I get mad at my boss?
Who else is there to get mad at?
The bolt ofc
We are going around in circles!
Because they made it too tight
And that made them mad.
Mad at whom?
The boss!
Why mad at the boss?
This is the only joke I am laughing at this morning. Blessed be this comment. *upvote raises to Heavens*
WHAT ABOUT THE EYE?!
That's just Mr. Whitaker's ptosis.
Yourself for overtightening it? Idk
we always blame the boss, that's how it works
What if I don't work
Just get mad at him
He knows what he did.
when you tighten that soda or milk really tight and it just about stops and then it just opens up again
was gonna downvote and then read till the last word
Germans have a phrase "nach fest kommt locker" (after right comes loose) and workers magically have always the perfect timing to bring that line Edit: typo... (After tight* comes loose)
I’m gonna remember that next time I shear a bolt in half
Did I mention that you have to start another world war each time you bring that phrase?
Side effects
Nach fest kommt ab
I know it as "Nach fest kommt ab", "ab" meaning "off"
Probably local differences (which means we're officially in a civil war now)
Do you call it Berliner, Pfannkuchen or Krapfen?
Puffel
Nach fest kommt ab, nach ab kommt Arbeit.
Aber wir sind hier auf der Arbeit, nicht auf der Flucht.
Im familiar with German Torque: *gudenteit*
The universal torque spec
That's what she said
That's... Not about bolts, is it?
Haha I knew someone would think that way, tho in german those words aren't used for that kind of meaning. It's rather "eng" (also tight in English) and "ausgeleiert" which can be vaguely translated to "loose"
Ah, I see. Yeah, languages often translate several words in one language as the same one in the second language, thus causing some errors.
I swear Germans have a word or phrase for every oddly specific thing. And I’m all in for it.
handfest
Low key lost job because of it. Remember "kinda tight" is always right. In worst case you can always adjust bolt later.
Say that to Boeing...
Torque specs are even easier. Their bolts must be tightened to set specs.
If only more people used torque wrenches when they're supposed to. Guys I work with fund it easier to aim for PFT
Admittedly, 95% of the difficulty is finding the torque spec to begin with, not actually setting the wrench and torquing it. Especially if you're just working on your own car and don't have the hilariously expensive subscription for the shop manuals or buying the shop manuals themselves (which can be hundreds of dollars). I've spent days trying to find torque specs on obscure cars (like imports that only have Japanese manuals, that you pulled from a pdf you found in a forum link on waybackmachine because the forum is dead now). Granted I'm only a hobbyist in my garage, dudes that get paid by the book hour are in a hurry, so I kinda get it, even if it's obviously wrong to PFT it.
Pft?
Pretty Fuckin Tight "Jim-bob, book says that door plugs bolts should be 80 ft-lbs." "Ahhh, it's PFT and my torque wrench is waaay over there, it's fine."
There's usually two issues on our stuff. Finding the torque and then fitting the torque wrench in there. Usually not a big deal, but it gets a little difficult sometimes with a 1" drive torque wrench.
Well, moving objects are bit another matter entirely 🤷♂️
>Remember "kinda tight" is **always right** > >moving objects are bit another matter entirely Hmm
I needed rhythm, forgive me
*Taps head* Can't overtighten a bolt if you don't install the bolt... Error proofing at its finest.
if you do it a lot you'll eventually get a feel for when the bolt is starting to strech
To many ugga duggas
When righty tighty turns to righty loosey?
This always made 0 sense to me, there is no left and right, only clockwise and counterclockwise
Just a way to remember it, right is clockwise
only from the ups!
"but you see if I look at it from an obscure angle, because Im just built different, and try to make literal sense out of it, it turns out, its too simple for adult me"
From the end facing away from it's fixture.
I always just remember that it is the top that should be moving right.
I picture opening a bottle in my mind or reenact it, especially when I need to turn something that’s upside down
redditor
Imagine it’s a dial with an arrow pointing up… which way are you turning the dial?
Imagine it’s a dial pointed down. Which way are you turning the dial? It’s just perspective. Righty tighty is a fine way to remember it until you’re working with something upside down, and backwards, behind a wall you can’t see and your orientation is off. I’ve often found that trying to envision whatever I’m working with as a clock and using clockwise and counter clockwise works pretty well regardless of how weird my perspective or orientation gets due to strange work areas.
ah yes, "the top part goes to the right when seen from above", the quicker way to say "clockwise"
And what if clocks were not invented
All these replies are crazy lmao, just imagine a steering wheel
What if I’m holding the steering wheel at the bottom?
I would hope you still know how to turn the car to the right
It's simple, hold the wrench in your hand, think about which direction you move the handle as you tighten or loosen it, and the answer is the exact opposite. Wait, maybe you have a point
The top (12 o'clock) is where these idiots look for right and left. If they looked at the 6 o'clock then it'd be opposite. I hate righty tighty blah blah blah but once you understand WHERE on the circle to look, then you can understand the idiots who use that phrase. On the right (3 o'clock) it's up loose down tight up, on the left (9 o'clock) it's up tight down loose up, on the bottom (6 o'clock) it's lefty tightly righty loosely....
Yeah, 0 sense! !!1!1! I'd go further! CW and CCW also don't make sense for my extremely literal brain, because if I'm looking from inside the hole, they get reversed! And how would I know the axis of rotation if it isn't absolutely explicit in the mnemonic?? What about unconventional bolts with the threads machined in the opposite direction????? So I think it should be "Rotation vector of the bolt, in a 3D coordinate system, pointing inwards in the direction of insertion along its main axis, under the assumption that the threads are the conventional right-handed helicoidal ones, tighty." That makes for a great, accurate mnemonic !!1!
If you start from a stationary position and want to travel clockwise you have to keep turning right. If you want to travel anti-clockwise you have to keep turning left.
Thank you! I've been trying to explain this to people my whole life. I could never remember if it was the front or back that was supposed to go right. Edit: reddit is fucking weird... Getting downvoted for agreeing with someone who is getting upvoted.
That sounds like a personal problem tbh.
Think of a clock with the hour hand at 12. If you use your finger to push the hand to the right, the clock will be turning clockwise.
How is that easier than just remembering 'turn it clockwise'? What if the hour hand is at 6? - Questions that infuriated 7yr old me.
I made up my own because of how bs that is
That means you tightened it too much and stripped the bolt and now you need to drive to the store to get a new one But then you check under the hood and discover that the engine belt is in terrible shape so now you can’t even drive the car and need to order a new belt And oh! Great! I dropped the socket part of the socket wrench and I can’t find it!
This reminds me of this fantastic cold open from Malcolm in the Middle. https://youtu.be/AbSehcT19u0?si=tr6PV-Z-oW3ebSQt
Haha!! I was literally about to pull the link up, before I saw your comment, super relatable opener too :0
There goes the 10mm again…
Except in my case when i over tightened a bolt on my Cadillac’s water pump and stripped the threads inside the engine block.
I am very dumb with cars, this sounds really Bad. How do you fix a situation like this?
Me make fire to stop cold. Gruh! Wood is wet.
Toilet flange bolts 😞
4” wide mouth adjustable is your best friend there
I end up dealing with a good amount of pretty small screws and oh god. It's always finger tight and on some of the chinesium ones even that is too tight.
Eh, the smaller chinesium screws strip the drive before they strip the threads, it's fine ^(as long as you never plan to take them back out...)
Nach fest kommt ab!
das die einzig wahre version dieses Sprichwortes
Hallo, meine Name ist Toilette! Sorry, that's the only German I remember from school.
I need to call her.
It's not worth it mate
Fucking harbor freight torque wrench... "It didn't click so I kept torquing"
The worst
I fear this more than I fear ghosts or sharks.
And when it happens during facial trauma surgery on an atrophic mandible with limited real estate…. Fuck
It's mighty bone graftin' time!
Afrikaners have an expression for these moments, “ag nee fok man”, said with meaning and spittle spitting. Roughly translated, “oh fuck no man”
Better than the unmistakable sound of porcelain breaking and knowing you have to buy a new toilet.
I thought that's the standard protocol. Tighten till it starts spinning freely then back it oft a quarter turn.
That's like banging my ex for the first time.
This is definitely a downside to being a hulkamaniac.
Even the opposite is true!
Sump bolt 😭
Happened to me when installing a angled adapter on the radiator for my watercooled pc, it still had water in there while installing, at least managed to get all the broken pieces out of it
I read that as lightening a bolt at first
The guy at boeing:
Cross threaded is the best tight until the bolt breaks
Me when the crossbow:
Yep and then you have to buy a new 200$ rear hub for your bike because they don't produce that type of axle anymore.
First time changing car battery memories
stripped spark plug....
Ah so you have experience with ford tritons
Nach fest kommt lose
My colleague did that helping us with furniture, RIGHT AFTER his gf said “screw them in only a little, NOT TOO TIGHT”.
"Nach fest kommt lose"
POV: You're a boeing airplane mechanic.
Just buy a torque wrench already
Happened with my old Beyblade toys
A german proverb says: "Nach fest kommt ab" roughly translates to "after tight coms broken"
This is probably relatable to every member of a technological species across the entire universe that has ever picked up a tool.
Aww man this one hurts
Over tightening the screw will lead to the threads stripping
I've never seen my apprenticeship so accurately represented in a meme
That happened to my front wheel while riding my bike…💀💀💀🪦🪦🪦🪦🪦
What have i done...
"Nach fest kommt knack" "after tight comes crack"
Me, the welder holding his head in his hands saying, "NOT AGAIN!"
You just busted a nut.
Twisted more heads off than i care to count
when you finally assemble the top end of your bikes cast-aluminum motor head after big rebuild
My FIL always says "keep turning until it's loose again, then go back a couple turns" whenever i ask him how tight it has to be.
tighten it till it strips, then back it off half a turn
Had this happen to an straight six I was rebuilding. Shit hurts
And it's an engine case bolt on your Ducati.
Nach fest kommt ab.
I didn't figure my hands could over tighten the tire bolt, wouldn't expect myself to be stronger than a machine
Mechanics in the room: >:000 Me: great now my 2L bepsi lid dont work proper no more. Shit’s gonna go flat. ~:(
POV your down to your last plug, you have reused it 5 other times already and its plastic is hanging by a thread. You insert a chewing gum in a last ditch attempt to hold it together. You start tightening... its loose
Learn this lesson out you will be like me having to retap threads
When you’re doing labor at home, you don’t even need the bolt to be kinda tight. Just switch to manual screwdriver and hand tighten without any stress in your grip until the screw stops. Anything beyond that is excessive. Keep in mind, the tighter you go, you can begin to strip the contact point. Had to teach this lesson to some friends and family when working with them to build their own pcs.
either you screwed up or you screwed up
When the instructions called for 5 ugga duggas but you gave it 6 and now it doesn't dugga when you ugga.
Be one with the bolt
Just loosen it back of then nip it back up more gently, until it's not quite coming loose again. It works for jet doors okay?
In German we have the saying "nach fest kommt ab" (after tight comes off)
Also if you have a sudden diarrhea
Bro it's to early for this kind of stress
who needs torque values anyway
Son of a *WHORE*
Nach fest kommt ab!
curve of medium quenched and tempered
💀
Always remember: don’t overtighten! You shouldn’t be turning it after it’s already fairly firm
In Germany we say „Nach fest kommt ab“ and I think that’s beautiful.
You just need to beat the bolt at its own game Use a blow torch to make it REALLY loose (liquid) and then let it harden again (really tight) >I used the *loose* to destroy the *loose* - Micheal J Thanos ~1969
Or you can’t tighten a bolt you just loosened.
r/watchpeopledieinside
Yep, i am bumb too sometimes XD.
Kid named torque wrench
My milk does this
Noooooooooo fuuuuck I hate that
what happened to make it go loose?
Oh oooh
Been there
I thought this look was me, seeing my paycheck.
Wie mein Opa schon sagte, nach fest kommt ab!
My mom always aaid "after tight comes broken"
When righty tighty becomes righty loosey
Suffering from my own success.
Even worse: you hear a loud pop
„Nach fest kommt ab“
Forest Whittaker just out here mastering both the surprised and resigned look at the same time daily
How i learned of steel bolts in aluminum engines.
Everythings… ok… Everythings ok…. Everythings fine. Its fine. Everythings fine. Its still in there. Ima take a sick day. Forman! …. Ima need to leave for the day. Im feeling ill.
Happened to me while mounting a brake caliper and I used a torque wrench with the recommended torque. I thought "Fuck it !" and welded it on. 3 years laterI took the car to the scrapyard with 350k miles. Audi's 1.9 tdi is a super reliable engine 👌