A Permanent Magnet That Turns On and Off
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- Опубліковано 27 тра 2024
- In this video I show you how it is possible to have a permanent magnet that turns on and off with the flip of a switch. I show you several ways that a magnetic field can be blocked.
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*Any experiment you try is at YOUR OWN RISK. The Action Lab assumes no responsibility for any injury if you attempt anything you see in this video or on The Action Lab channel. - Наука та технологія
Next video : turning off and on gravity.
Ooo i would like that 😂
It happens on Lagrange points between the earth and the moon, their gravity cancel each other.
You need data from inside the black hole to do that. Someone call Matthew Mcconaughey quick
If this is true Newton will be disappointed
@@rhythm5080Mickey Pearson(gentlemen 2019) is busy man , we need kipp thorne for the data.
my magnet doesnt work :(
"have you tried turning it off and on again?"
Thank you...It worked!!
What about rice
IT Crowd 😃
*off and on
Not the other way around
Underrated comment.
I have seen this "switchable" magnet system on a portable drill press which uses magnets to attach itself to whatever steel item you are drilling, in my case, a large "I"beam.
I was intrigued by the way it could be switched on or off just by turning a dial on the side, and now I know how it is done thanks to you!😉👍
Actually magnetic base drills are electromagnets.
old drill bases use a different method ..... There is another way to do this , old Machine shop magnetic bases use a round magnetic inside of steel cube with 1/4 inch of non ferrous brass separating the two Steel sides.. When the north -south poles of the magnetic are aligned n the brass the magnetic field / flux completes the path shunting the the magnet = Off condition . Switch On by rotating so north-south poles are aligned to the steel . The NIB magnet ( Neodymium ) design seen in the video has a more powerful holding force than the the old base but old Machine shop magnetic bases are still sold so must be cheaper.
A variant I've seen on stationary machines is alternating brass and steel plates, and the magnets slide to align under the steel (to engage) or brass (to release).
I've seen these used a lot in machining for things like holding dial indicators and have always wondered how they worked. Thanks for the info.
You're probably using an electromagnet.
@@namename8004 I'm aware of what he's talking about because of past experience in machining. They're not electromagnets they are actually switchable magnets. When you turn the switch it rotates the magnet in side the base thereby switching the polarity of the magnet.
The dislikes are from the electromagnets.
Likes are from the natural magnets who enjoy evolution
Reason: For killing their kind
They should pull themselves together and deal with it.
It's because they got stuck watching this video. :v
28 magnets
Did not expect turning off magnets would require more magnets.
Its like love triangle lol
Science
It's incredible
I used the magnet to destroy the m...
not necessarily you could use one magnet and cut it in half
I'm a welder and these things were a game changer, they help with everything from fit up to simply being a mag vise for easy grinding. the company I worked for owned them and I haven't used them since (there's priorities for my money to disappear to) but I've been looking forward to buying a set of them again
I'm a welder too and we use switchable magnets for lifting plates on the cranes we use
Amazon has them.
I love how he is casually using a 1944 steel penny in his tests. I wonder if he knows how much it is worth
1.5 cents
They’re probably 1943 pennys
1943, and the steel ones aren’t really worth anything, only the copper pennies from that year were rare
I have a penny from 1954... It sells for 6 dollars online
Lots of countries use steel in their coinage
To me, the most amazing thing in this video is the revelation that there is magnetic "paper" that lets you see magnetic fields.
My guess is that it has fine iron powder inside but that's just a guess. Someone please correct me if I'm wrong
@@madallas_mons you are correct
Magnetic field viewing film is made up of tiny sacs of nickel filaments, not iron, suspended in oil embedded in plastic film.
Yeah
@@horus2779 dip into some Ken Wheeler
The Action Lab: Now let's test this theory out with my trusty metal sheet
The Metal Sheet: **KILL ME**
I think he's trying... 🤣
I didn’t even think it was steel when I first saw it. Looked like a sheet of plastic that’s seen some things.
@@trindalas *"Seen some things"* ah right right.
"Later" (Meet the Medic)
I thought it was a huge slice of cheese at first 😂
When welding frames, you can use a magnetic square that has a mechanical switch on it, once the magnet is "on", the square is able to stick to metal pretty easily, when flipping the switch "off", it interacts with some mechanical components that move the magnets inside the square away from the inner walls of the square, moving them as closely inwards as it can
Beautiful simplicity on that switch design -- thanks for breaking it down so cleverly.
You can also suppress a permanent magnet using Lenz’s law, by coiling a wire around it in much the same way you would make an electromagnet but in reverse. Once you apply a current to the coil when arranged correctly it will suppress the permanent magnet with an equal and opposite electromagnetic polar force. We use this principle in railway engineering. You should give it a try :)
That’s basically what he just described. Except you’re using an electromagnetic of the same polarity, rather than a permanent one.
@@jasgk74 pretty different to what he described then...
Yes & no. Potato, potäto. Either way, both ways are pretty cool.
@@jasgk74 agreed 👍🏻
*Lenz
The one time that "reverse the polarity" is the correct answer.
That one quote from Doctor Who
Jon Pertwee would approve. 😛
hahaha
@@anklihlaanlestrange4881 Huh? I thought that was the standard-solution for every other problem in StarTrek.
The other solution being: Kirk punching / romancing it.
@@robertnett9793 "Rotate the shield harmonics"
Great video. I always thought the 1943 penny was made from mostly zinc. I never realized they actually were mostly steel, even though they're called steel pennies. I've been wanting a Magswitch for years because they're just cool.
I am a 61 year old DIY dabbler and inventor and I am addicted to your show. I usually know what the outcomes of your experiments are going to be but sometimes I don't and I enjoy your presentations either way.
I'm just wandering how he's gonna separate that chunk of steel from that monster magnet.
Easy. Just heat it to its Curie Temperature by setting the lab on fire.
@@grantmalone 😂😂
He needs to call Thor for that.
@@grantmalone And kill the magnet
By putting an other monster magnet next to it! :D
I appreciate how excited he is about all his experiments. Wish I had more teachers like him.
Sure, but the video is around 8 minutes longer than needed for such small thing. Explaining the same thing again and again make me annoyed. Obviously he wanted space for more ads.
@@doyoufeel...thatyoulackcri6760 your grammar “make me annoyed” 💀
I would be too.. "when you turn it on it sucks it up"? Sign me up for one! 😁
@@doyoufeel...thatyoulackcri6760 you need to learn that that's youtubes fault not his.
If I can get interesting content for free and all I have to do is skip through the boring parts? I don't see the problem at all.
You should be blaming youtube and not him.
lucky you, from your writing i assume that you have at least one or more good teacher, me no one😥.
When I first got into machining that was one thing that blew my mind was the indicator bases. It was an on off switched magnet and it was incredible to me
Incredible teacher! Been following for a while… Scribes, and I say…
It's awesome how are you taught us first, how magnetic flux will shortcut through the steel plate… THEN ! You showed us how it's short-circuiting through their manufactured magnet block … Awesome technique , I understood it right away! Thank you so much , awesome content always
I've seen this on my workbench at school and it made me curious about how it works, and here is the answer
Yeah same😄
It made me wonder why magswitches cost so much. Because everything woodworking does, I guess.
check out the metalworking equipment... woodwork is peasantly cheap in comparison
@TheActionLab, I've been playing with magnets for years. I did not know this and was like "what is this voodoo magic magnet that can turn off?" A couple twists later, AND IT TURNED OFF??? 🤯🤯🤯 Awesome video, thanks for teaching me something.
Didn't You see a magnetic excavator? In Cartoons or Real life?
I use these quite a lot at work, they are very useful to position holders that hold sensors around a test article. Put it in place on (or below!) the steel base plate, turn the knob and it goes nowhere. Make sure the magnetism doesn't affect your test though. I had some idea how it worked, but now I know. Nice video!
I use these magnets at work to move huge metal parts, always wondered how they work awesome video!
Thumbnail seems interesting.....
Lol
I don't get it, (i can tell it's something sexual)
XD
Shut up
@@YellowLAVA turn off aka "not be horny anymore" and the ""intresting"" part of the thumbnail is it looking similar to flaccid male genitalia.
Yes I just explained the joke, yes I also hate myself. Thank you
Awesome information and demonstrations! You just covered like 10 of our articles in one video!
I have some of your magnets. love them. thanks
It's always a pleasure to watch your videos...no hidden things, no incorrect statements, no ambiguity.
I wish you had a video that explains details of a permanent magnet table (a lever is used to neutralize the attraction force). No existing videos go into polarities, thicknesses and material specifications, so I personally hesitate to start a potentially expensive experiment???? 💯
Wow, amazing video.
I never thought it was possible but thanks to you, I learnt something new today.
I have always been fascinated by magnets..
Keep up the good work mate.
You know the science teacher is cool, when he use memes to demonstrate the process
Spleens
Lungs
Kidneys
@@mr.potato3779 tonsils
@@mikkel5248 arteries
Holy cow !! That sheet of steel has been through some real shit :(
F
F
F
F
F
Really, I was obsessed in discovering this switching magnet's execution and your video became the end of my search. Thanks for an excellent instructional video job!
so by angling magnetic poles 180 degrees you can “turn off” the magnetic field. so wouldn’t it make sense to be able to amplify the magnetic field by alining magnets so their poles are at right angles to each other?
Yup. Particle accelerators do this along the entire ring of the accelerator. Though, the magnetic field in this case is less responsible for accelerating the particles and is more like a gutter guard in a bowling alley.
I felt sorry for the steel plate. It looks it has been through a lot
Don't. They are resilient and bounce back. Always do. God, not science.
Steel plate: "Kill me"
Action lab: "Later"
still*
The moment when you can't hear the difference between "still" and "steel"
This was driving me nuts during the video.
I have friends with a similar accent, and their last name is spelled "Still" but pronounced like "steel."
Good use for the subtitles function... Oh, wait...
Very interesting. That last graphic showed it perfectly. So this is how the magnetic base for my dial indicator works. Thank you.
I remember a couple years ago I was playing with some magnets I had and figured out that they have values; that they’ll cancel each other out if one is facing north and one is facing south. And now I’m realizing, I pretty much did figure out how to turn off magnets.
I feel so smart.
for some reason this reminds me of redstone, using magnet to turn off magnets.
@Satsuki Shirotae yes
how can you build a "magnetizer" so that you can magnetize screwdrivers, hammers, etc.? How do they do it commercially?
As far as I know, they apply a very big magnetic field to the metal, so its spins get aligned
I don't know how to do it permanently but I keep a strong magnet on my bench and pass a screw driver over it a few times to temporarily magnitize it to get a screw in a tight spot. Or just stick a small one to the tool for an instant magnetic tool. Commercially? idk.
They are done by powerful solenoids....the piece of metal that has to be magnetized is place inside the solenoid and very large amount of current is passed through the solenoid which in turn creates a strong magetic field around that metal and that metal becomes a permanent magnet.
Screwdrivers just rub it on a strong magnet or leave a small neo magnet stuck to it. It wont be that magnetic but will hold a screw. Real magnetizing fixtures use solid copper gold plated buss bars a truck battery size capacitor bank and I assume large transformer? to develop a quick massive current to the fixture. RUD can happen and blow the heads off the bolts if it's not done correctly. Not sure about the transformer but the capacitor bank is big enough to need wheels. Putting a pre magnetized pc in a fixture needs to be oriented correctly or you just made a missile.
You just keep running the tool over the magnet in a single direction or run the magnet over the tool in a specific direction and it'll magnetize the tool.
I use the same switchable magnet but bigger to sometimes pick up steel parts at work and was always baffled by how does it work since its not electric. Thanks for telling me how they work. 👍
I love how easily you explain things so simpletons like me can understand thank you
Here’s what I learned: I need one of these magnets now
look at places like mscdirect or mcmaster-carr, they have bases for indicators used in machining that have used this tech since the 1920's, and they are much better designed to be useful as a magmount for things rather than as a pickup tool like the one in the video... for less than $40 you could get this part number from mcmaster 20715A44, and it even comes with the indicator ( a crappy one, but you want the base) you could prob use it to mount cameras and such
edit: I just looked back at the product page, the thing can hold 132 pounds if that matters at all, lol
@@schwig44 thanks for the info!
@@homelessrobot make your own. piece of iron and 2 magnets,just flip one magnet
I would like to know where he got that steel penny. Those were minted and used during WW2. His looked like it was in great condition.
Yeah I saw that too I was completely dumb founded that he was just flashing those around. I wonder if he knows what the value of those pennies are?
I thought I was the only one that noticed haha glad I’m not alone 😎
You can get them at most coin shops or online. There were more than a billion of them minted, so they're not at all rare.
@@fullthrottlenotoggle19 Those pennies are worth about twenty-five cents on average. They're not at all rare.
Looks like they're re-plated, so practically worthless
I had some theories about how these worked but didn't want to buy one to take apart, this was very informative.
These are cool, my dad has one on the base of a tool he uses to check center when turning materials on his lathe. I have always wondered how it works since it is not an electromagnet, thanks.
I first encountered this with a metal surface grinder. The magnet is strong enough to hold the steel being finished in place. It is released by turning a lever. I never figured out how it worked. Thank you for the explanation and demonstration.
It may be this method, may be just magnets sliding under a brass-steel pattern. On the one I saw, the stripes were quite visible.
3:50 Many modern soldering irons use this effect to control the temperature of the iron tip.
And finally, a great use for a 1943 steel cent. Great video, with a lot of valuable information.
Truly mind blowing stuff, yet the demonstration was pretty easy to follow
I never seen the real magmatic fields ,that's really amazing 🤠🤠🤠🤠
soccer field on a volcano
Magmatic
get some iron filings on a piece of paper and put a magnet on the otherside and see the magnetic field
I can see magnetic waves.... Theyre everywhere
When he showed the switchable magnet, I instantly thought "It probably has a second magnet to cancel the magnetic field of the other".
Ok
action lab is only popular channel still being real and not that stupid accenty tone and no clickbaits.
he ACTUALLY delivers whats mentioned in title. super amazing.
I use switched magnets for welding fabrication. What's really neat is when off even metal filings from grinding come off. I now use them to vacuum up the bench and drill press.
0:35 Ahh... The memes
Is it weird that I was constantly distracted by the extremely rare steel pennies that he’s casually using for a science experiment?
i have no clue but he is useing 2 of them for it there is no way that he has them without knowing
Also distraught at him letting washers and other metal slam into them denting the faces
@@SuperWhoremuffin!
Steel pennies aren't extremely rare. Copper pennies of the same year(s) are the rare ones. They were made of steel during the WWII era because of a copper shortage.
@@flywithoutwingz Huh, TIL. Thanks for the history lesson. You collect coins?
I was a Tool and Die maker for 40 years and we had a permanent magnet chuck to grind parts and we could turn it on and off by sliding another set of magnets over the other permanent magnets. This has been around for a long long time.
Ah we use magnets like these for welding! I was always curious how they turned on and off.
Electromagnets: allow me to introduce myself
flesym ecudortni ot em wolla :stengamortcelE
@@aetheralmeowstic2392 *noitcefreP*
ɟlǝsʎɯ ǝɔnpoɹʇuᴉ oʇ ǝɯ ʍollɐ :sʇǝuƃɐɯoɹʇɔǝlƎ
@@rhythm5080 nmaD
How in the heck am I able to read these replys
Really good session and the magnetic paper was a revelation to me. Thanks for taking the time to share what you know here.
At 3:15 from what I understand it isn't about steel becoming "saturated" and "passing through" the flux, it's becoming magnetised and turning into a part of the magnet itself. The paper shows this, showing the steel block as a magnet, not a distorted shape of the magnet behind it.
THIS is why I love your channel. Please keep doing your thing.
if you look at magnetic paper in front of 1" thick steel that was placed in front of square super magnet the paper is not showing a square field 'coming' through steel but is showing the shape of the 1" steel itself. The magnetic field is being translated into the 1" steel , not going through it. (same thing happened with small circular magnet . )
I noticed that too
True, but the effect is identical. There's still no shielding effect.
I didn't know that it was possible to the the 3-D lines... Damn... Nice research bro
Bro??
@@raybois
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Thank you for clearing some important question about some tool we've been using in machining.
Can you have a demo of electrogravity? 1) Using capacitor plates with + pointing upward. 2) using a ferro-mercurial mixture turning in a toroid? I found this very interesting when I was in college.
I know these switchable magnets from my apprenticeship we used them on the mill to adjust the vice on the mill table.
They held the dial indicator on various positions on the mill
nice vid
One thing I would like to see demonstrated is "What happens if the two permanent magnets have opposing orientation at the coin and you add an identical coin to the opposite side of these magnets".
The result won't be much different. The neutralizing effect will be somewhat enhanced because the magnetic field will be more efficiently contained.
We use these in the machine shop I work at to hold dial indicators to things, I always wondered how they worked. Thanks for the video!
Amazing.
You have helped me understand the lines of flux and how hey interact with each other and objects near to he lines of flux.
Great job.
Thanks! I learned something! Would've liked to see the magnetic feel viewing sheet used on the controllable magnet though, bummer
K&J Magnetics is a great source for all sorts of magnets like this. NOTE: be very careful letting magnets snap together! Neodymium is extremely brittle and fractures easily creating some pretty sharp edges and teeny fragments that stick to things and are a pain to clean up (usually I mash duct tape onto the magnetic "gravel" and that does the trick).
i had no clue what was going on but i found it very satisfying to realize what it was before it was revealed, what tipped me onto it was the handle being turned around
I have often wondered if magnets could be paired with mechanical linkages to produce perpetual motion. Then I remember friction. Could a friction less mechanical linkage be possible ? Maybe those magnets that levitate ? Liquid bearings ? Is there some energy source that we have not discovered yet that will overcome E=MC squared ?
Wow, that was really cool, professor!
i noticed this when i was a kid and playing with magnets. always wondered what was going on. this is really cool and is great to finally know why they do that
We use big toggle-able magnets in fabrication and welding all the time. Super useful for keeping a part in place to grind it, bevel it, tack it? Then it’s easy to take off.
Love these magnet videos, thanks. They've helped clear up a lot for me. How about some ferrofluid videos? I'm very interesting in magnetic spheres coated in ferrofluid as a means of reducing friction across rolling surfaces.
You should say that the energy (work) required to switch off the magnet is the same as the work that can be transferred to a mobile 😎
A mobile?
it's either your having a stroke, or I'm having a stroke.
@@nikofox8513 Probably both
By mobile he means any object that you can effect with the magnet.
@@jvcrules ahhhhh
great video, i had no idea! would have been useful to see the inner workings of that magnet that turns off. a cross section or something.
Awesome. Was always curious about how those mag chucks worked.
4:17 the Weller Magnastat soldering irons also work with a magnet that is switched off at the Curie point. If the temperature drops, it becomes magnetic again and the soldering iron is switched on again. This is available for 24 volts, 120 and 230 volts.
Great work as always.
I wish to see changing magnetic field lines(like a animation) when you change the orientation.
Look up ferrocell or super cells
@@ChazZen hey Thanks:)
Bullet trains: **nervous sweating**
I swiped a magnetic ring stand base from my dad's lab that had a physical switch with permanent magnets. It was about ten pounds of force in the Off position, and more than a hundred when you switched it to On. There was a manmade lake near where I grew up and I used that magnet to go magnet fishing in the old valley a few times. (Bottle caps and hubcaps and not much else.) Took it to school to show my chemistry teacher and he was really confused that it wasn't an electromagnet and had no batteries.
6:34 when the neodymium magnets sus! 😳 😳
🤨📸
i LEARNED something amazing, and im probably gonna go try and make this (and fail.) but thank you anways. this was pretty cool to learn
:)
Why am I understanding this better then what my physics teacher thought me
Because it is shown and not just told
Because you didn't pay attention then. You're paying attention now.
@@sangramjitchakraborty7845 who told i didn’t it was a joke, kid
Because you've had time to let it sit in your mind. All science/math learning is like that.
Just every videos starts with iconic start
As many people here I was aware of that but newer understood how, welding clamps, or also grinding accessories, many thanks for the explanation!
I assume that it takes energy to turn the magnetic switch on and off to overcome the magnetic resistance to rotating one of the magnets. Otherwise you could use it to make a perpetual motion machine (A kind of motor that used permanent magnets instead of electromagnets).
It's fully possible to make a fully permanent magnetic motor but I'm pretty sure the magnetic fields degrade away over time as they interact with opposing polarities
The Action Lab: A Permanent Magnet That Turns On and Off
Me: Real Life Sticky Piston
Thank you. In university I was forced to learn something about magnetic circuits. I don't know if it was explained in the lectures but I feel like i am only starting to get it now.
What you are looking for is what’s called a magnet chuck or vise. They use permanent magnets that with some neat engineering allow you to turn “on/off” the magnets.
Now this person is bending the physics
5:41 my crush to me
Wow, that's awesome! I wonder if there could be a mechanical application for this to power a small vehicle. Through a complex system, maybe many of these devices could be synchronized to activate at certain points of a rotation, providing rotational force to an axle. Maybe the machine could even be hand cranked!
You are absolutely my favorite new channel to binge.
Be safe.....cause we need you in our life😂😂🖤
This is a really interesting video. For some reason, it feels like I get smarter with UA-cam videos more than school lessons.
Agreed
Correction: you **are** getting smarter off of UA-cam content.
Well, as long as you get the point, it's alright. I appreciate the grammar correction, but I really ment "I", not "you".
@@dude9159Pog
@@dude9159 No it wasn't a grammar correction lol, it was a word adjustment from "you feeling" vs "you are"
This is amazing I always had this question from a long time.
Been using those switches in my job, always wondered how they work