Buyer's Guide: Grades of Magnets

Рет қаралды 193,761

11 жыл бұрын

Beer, vodka and magnets? Sounds like the recipe for disaster but that's what I'll use to explain grades of magnets!
It's important to know about grades when shopping for neodymium magnets. In this video I tell you about the basics of it and compare the powers of ferrite- and neodymium magnets. Feel free to ask questions if you need help or in doubt.
Music credit for the outro:
'Junkyard Tribe' by Kevin MacLeod
ISRC: USUAN1200021
incompetech.com/music/royalty-...
English captions available - just press CC under the video. Danish captions coming soon...

Пікірлер: 171

@brainiac75 11 жыл бұрын

Thank you very much! I've always loved science and have never understood why so relative few people are interested in it. I try to share my fascination of it and hope people can see that science can appeal to most people. Luckily it looks like people are beginning to realize that there's more to KZfaq than just music videos and people failing ;)

@jenniferreynolds9521 3 жыл бұрын

Hello

@sitarnut 11 жыл бұрын

Best Channel on KZfaq for making things clear about science. Wish you a long and fruitful career as an educator of folks who've been curious about science since junior high school. Love the common sense and humor put into your demonstrations. Wish that it was mandatory for all high school students to watch- we had "Mr. Wizard" back then- you're the wizard now my friend!

@tomsmiek4953 2 жыл бұрын

Hell yes. THANK YOU. I was a bit curious about magnets but could not have wished for a more thorough introductionary video. You rock.

@riotpoliec 11 жыл бұрын

Wow, great video. Glad to see you are still making videos, I always enjoy watching them even if they don't have anything to do pertaining to my life!

@Waelsa2008 10 жыл бұрын

Very nice and informative. I couldn't find all this information in one place and easily explained as you did. Thank you for taking the time to teach and inform others.

@machielste1 10 жыл бұрын

Just wanted to say that your vids are REALY well made , and very nice to watch :D

@skyblair6608 4 жыл бұрын

Wow!!! Thank you, thank you, thank you!!!I have been looking for something to explain magnets, because I'd like to go magnet fishing as a hobby.

@javibel 11 жыл бұрын

I really enjoy ALL your videos! They're amazing.

@whispergb 8 жыл бұрын

Great info with tongue in cheek humor. Thanks!

@brainiac75 8 жыл бұрын

+Greg Barnett Thanks for watching :)

@Pph0n1x 3 жыл бұрын

i love these vidos, with the apocalypse at hand they are very comforting. thank you!

@tosbossthinkorswimmplatfor3842 6 жыл бұрын

Good vid .. simple ... a true Kraut comparison - magnetic strength to alcohol - LOL it was great ..and a good way to understand it simply .. thank you ...

@cvejic25 11 жыл бұрын

Nicely done.

@tommygombar22 4 жыл бұрын

Valuable footage that enlightens the audience.

@alexgreene8931 10 жыл бұрын

Great video man! Funny and informative.

@marcomosna6261 8 жыл бұрын

Brian Bro... Your voice is calming :)

@brainiac75 8 жыл бұрын

Thanks Marco :) I am a calm person, so my voice doesn't lie :D

@brainiac75 11 жыл бұрын

Thanks :) It is neodymium magnets they use/used in MRI-scanners. They just use a lot of single magnets in them (up to 1 to 3 tons of them for each scanner according to Avalon Rare Metals!) stacked in a special configuration. Most likely some sort of halbach array - I don't really know.

@RoseMagpie 4 жыл бұрын

This was really informative and helpful! Thank you

@davidchanget2563 2 жыл бұрын

Thank you for this video. It helped tremendously

@dgamezonu2693 10 жыл бұрын

Love your videos!

@ver64 11 жыл бұрын

Awesome information,thanks

@kat2873 10 жыл бұрын

Wow very interesting, and you made it easily understandable for an idiot like me.. Your poor beer!.. Now off to watch more of your cool videos.. Keep them coming please.

@brainiac75 10 жыл бұрын

Thanks for watching :) I will upload as often as possible - but this is only my hobby and my free time is limited. But I really enjoy making these videos so more will come.

@The_Joker_ 6 жыл бұрын

Brainiac75 Have you ever successfully drilled a neodymium magnet? Bar under flowing coolant of course. Love your videos please keep em coming 👌

@brainiac75 10 жыл бұрын

Thanks for the support! More videos to come so stay tuned ;)

@claaaaams 11 жыл бұрын

These are fantastic. Thanks for uploading.

@Agap0r 9 жыл бұрын

very cool explanation, thanks!

@1stFaris 11 жыл бұрын

Great video as always. I was wondering how do Neodymium magnets compare to magnets used in MRI scanners. Not the superconductive magnets but the permanent-magnet used in older MRI scanners.

@sachinmundra 10 жыл бұрын

another well made vid! :) Cheers.

@wa4aos 9 жыл бұрын

Very helpful video. Many Thanks!!!!!

@caaarl2707 5 ай бұрын

the ohh my beer got me. been watching you for years but now that i even know for sure youre german you got a sub😂

@brainiac75 10 жыл бұрын

Thanks for watching! I have more magnet videos coming when I find time for making them so stay tuned :)

@yangyupeh382 11 жыл бұрын

Your vids are awesome!

@zowsk4527 10 жыл бұрын

Awesome videos! You should use meat or ballistic gel to demonstrate how dangerous metal objects and these types of magnets can be! Personally I don't know whether it would damage it but from what I've seen your largest one should make for an interesting video!

@brainiac75 11 жыл бұрын

Thanks for the support from all of you! I have the best subscribers :)

@1stFaris 11 жыл бұрын

1-3 tons of neodymium magnets, no wonder they switched to using super conductive magnets. Thank you for the reply, I really appreciate it :)

@abdullah32592 11 жыл бұрын

man , we love you too ^_^ keep up the good work , i mean you educate the humanity . thanks

@MichaelsTechCenter 11 жыл бұрын

Well look who finally uploaded a video.

@DirtyAssa 11 жыл бұрын

Great! I'm interesting find some magnet material for build audio coils & transformers! I'm also interested many kind of things! All the best! Assa!

@uivideo7637 5 жыл бұрын

Very useful thank you.

@khebnaccountgemaakt 10 жыл бұрын

Love how you compare magnets to alcohol!

@Eastsae 11 жыл бұрын

Informative and comical :)

@brainiac75 11 жыл бұрын

There's an interesting project about 'transformational nanostructured permanent magnets' that expect up to 80 MGOe (the equivalent of a N80 neodymium magnet!). I really hope they succeed! As far as I know the strongest neodymium magnet ever created in the lab was around N59 - the theoretical limit for Nd2Fe14B is N63-64 but that will probably never be achieved (you cannot get 100% pure neodymium or iron for that matter as ingredients for the magnets). Thanks for watching!

@brainiac75 10 жыл бұрын

Because they are awesome!

@spydercrypto8068 5 жыл бұрын

Can you do some vids on using mags to deflect end & radiation?

@giannababb6626 7 жыл бұрын

Thank you so much!!

@jasonmiller8839 7 жыл бұрын

All of your videos are fantastic. I work in aerospace as an FAA/EASA inspector of jet engine components and I am about to go back to school for metallurgy and polymers, so these are a great learning tool. About your gold watch-band test; is it better to do that with a spherical magnet, and what if the size and RHmax of the one you were using?

@brainiac75 7 жыл бұрын

Thanks :) Any shape of magnet will work for the test but I often use a spherical magnet because it focuses its magnetic force to a smaller spot on its pole. This gives it an intense field suitable for detecting the magnetic susceptibility of the material being tested. The shown magnet is a 1 inch N45 magnet. Bigger size and stronger grade will give a faster, more visible reaction.

@chrisawesome3091 5 жыл бұрын

How strong is a proton’s positive magnetic pull?

@DavidChristmas 11 жыл бұрын

Thanks for new video

@mikeatona69 4 жыл бұрын

I have a question about my 40x20 mm neodymium-magnet. I think that grade n35 is stronger than grade n45. How is this possible?

@brainiac75 11 жыл бұрын

That's very generous of you!. I may have to arrange a trip to Aarhus ;)

@alizein5794 2 жыл бұрын

Good work. Thanks for this wonderful video which u entitled " Buyer's Guide " whilst u did not refer to where one can buy such magnets or price rates . Will u please do ?

@HyperSpeed84 10 жыл бұрын

Thank you.

@roycezaro1998 6 жыл бұрын

How did you make the magnet attacking the beer look so much like a horror movie? It's almost like stop motion- super uncanny

@genericchannelname2061 3 жыл бұрын

does anyone know where i can get the n45 magnet he was using in the video

@JLM32007 7 жыл бұрын

thx. it helped me for what i need to know

@brainiac75 11 жыл бұрын

It's actually from magnetportal'de but both are selling the exact same magnet from the same surplus stock from a German generator company that changed the way they make generators (Siemens??).

@jordanpick3731 9 жыл бұрын

Hiya. Great Video thanks. I am creating a hexagonal spice jar rack that I intend on placing a magnet into the lid so it can attach to the fridge. Do you think a 10mx2mm N35 will be strong enough for this? Thanks in advance for your help

@brainiac75 9 жыл бұрын

Attaching a spice jar rack to a fridge is not that easy with magnets. The magnets will easily be pulled down - the fridge has thin sheets and is quite 'slippery'. So no, I believe you need larger magnets or other tricks. Here's some info: www.kjmagnetics.com/blog.asp?p=leverage

@jordanpick3731 9 жыл бұрын

Thank you for your help

@Kalanchoe1 11 жыл бұрын

always interesting :)

@alexhsu190 10 жыл бұрын

Can you please make a video on how you store your magnets?

@std808 8 жыл бұрын

What size/grade/ type would you suggest for an excellent fridge magnet. Something that will hold 10 pieces of paper easily

@brainiac75 8 жыл бұрын

+st D It actually depends a lot on the thickness of the sheet plate that your fridge is made of. On my modern Samsung fridge a 12x8 mm N45 disc magnet will easily hold 10 sheets of A4-paper.

@WayneJohnsonZastil 11 жыл бұрын

Do think it's possible to create even stronger magnets in the future any ideas?

@brainiac75 10 жыл бұрын

That's not a bad idea. I may make such a video. In my video 'How is a 6" neodymium magnet delivered?' you can see how my big magnet is stored in the original packaging. There are also some short clips in my video 'Testing my magnet collection'. Feel free to ask if there is something in particular you would like to know.

@kevinnistor1954 10 жыл бұрын

where do u buy ur magnets

@roborobo8370 3 жыл бұрын

Now ik which magnets i want for my cube :)

@TucsonDude 9 жыл бұрын

I'm thinking of buying two 50mm (diameter) X 25mm (thickness) magnets. Is there anyway to separate them if they are stuck together without a spacer? I've seen a guillotine method and the tool costs around $50.

@brainiac75 9 жыл бұрын

Yes, you can separate that size with a large 'guillotine' even without spacer. In this video I do it with two 70x20mm: Spacer or No Spacer 50x25mm is quite a size so I would definitely recommend using a solid tool for separating them.

@brainiac75 11 жыл бұрын

Yes, I'm from Denmark :)

@brainiac75 11 жыл бұрын

If I had access to supercooling I would experiment with superconductors :) Neodymium magnets improve their strength down to around -138*C but lower than that and they start loosing some power. Replacing the neodymium completely with praseodymium (Pr2Fe14B) makes some strong magnets that increase in strength the more you cool them - even at very, very low temperatures. I wish I had access to a lab...

@snowthemegaabsol6819 7 жыл бұрын

Two magnets with the same physical density will have a similar magnetic acceleration, though the field strength will diminish far quicker with distance on one that is smaller, and being the same distance relative to the ratio of the diameters of the two magnets will give you some complicated formula that basically tells you that it's weaker than one would think

@bindujollyshibu9146 6 жыл бұрын

What is the name of that strong magnet

@brainiac75 11 жыл бұрын

That is actually quite tricky if you have a magnet of unknown grade. A gaussmeter is my only idea but those are expensive.

@jokerwhy8 5 жыл бұрын

Whats the 2 balls fighting called

@JLConawayII 10 жыл бұрын

I want a magnetar-grade magnet. Where can I buy one of those?

@brainiac75 11 жыл бұрын

The magnetic field still penetrates the pyrolytic carbon even though it is highly diamagnetic. So you would have a quite normal magnet except for a fragile coating that would constantly try to escape the magnet :)

@iRhinoPro 9 жыл бұрын

Like your videos

@brainiac75 9 жыл бұрын

iRhinoPro Thanks! Stay tuned - more to come :)

@adnanmlivo5885 7 жыл бұрын

how did you do that scene ??? on 2:50 you moved magnet with another on under the table but did they crush each other ??????????? so many questions

@brainiac75 7 жыл бұрын

Yes, I did move the magnet by using another magnet. But there was only one magnet on top of the table, when I did it. The rest is video editing ;)

@adnanmlivo5885 7 жыл бұрын

Brainiac75 oooo Thank You for response

@RizLazey 7 жыл бұрын

So basically ferrite magnets are x10 weaker then neodymium magnets, is that correct?

@brainiac75 7 жыл бұрын

Yes, that is a good rule of thumb.

@abhimasnale9908 3 ай бұрын

Hi How to get Nd38SH magnet? Is any supplier in india?

@lontheadventist426 8 жыл бұрын

Do you have any online shop for all super and bigger size of magnets? How can I order even I'm here in UAE?

@brainiac75 8 жыл бұрын

+Lon Revadenera Sorry, I don't sell magnets - I'm just a collector. I think magnet4less.com will ship to UAE, but you have to ask them first and expect a high delivery cost at slow speed. Shipping large magnets is done by sea freight - putting them on an airplane needs a lot of expensive shielding.

@lontheadventist426 8 жыл бұрын

Ok....thanks brother.

@tomjeffersonwasright2288 8 жыл бұрын

Beer and Vodka. Something we can all relate to ! ! !

@LazlaTheFallen Жыл бұрын

the prizes really gone down since this, could you do maybe new video aobut magnets of today and prizes

@jamessims1072 10 жыл бұрын

I used to work for a company that did computer upgrades and refurbishment. I would take the old 5.25" floppy drives home and cannibalize them for the magnets inside. They made great fridge magnets, but I would never place them away from an edge area of the fridge(where they could be pried off). Could you tell me if they were most likely, historically ferrite or neos? I have no idea. They were incredibly strong for their relatively small thickness, so I would guess neodymium.... I wish I could still get my hands on some of these.

@brainiac75 10 жыл бұрын

You can still cannibalize hard disk drives for neodymium magnets :) I have no experience with the old 5.25" floppy drives but neodymium magnets were invented in 1982 so they could easily be part of the drives made in the 1980's - especially if you found them very strong for their size. If they had a silvery, metallic coating they were not ferrite magnets. Thanks for sharing your story!

@yvonneeibeck6581 Жыл бұрын

you should make your slide (@:52) as a downloadable slide -- very nice for teachers -- thanks

@caterscarrots3407 5 жыл бұрын

Why did the neodymium magnet get attracted to the beer? Was there iron oxide in it or what?

@SleepBabySleep30 3 жыл бұрын

Do you have an email address? I have some questions as to the drop off distances when using permanent magnets and electro magnets. Cheers

@TheMCCraftingTable 11 жыл бұрын

but how can you tell the grade of a magnet? thanks :)

@TheMCCraftingTable 11 жыл бұрын

thanks

@tathaagatssiddhartth3439 8 жыл бұрын

i have a headphones. it says it has neo magnet.. so is there a way i can take it out from there?

@brainiac75 8 жыл бұрын

Yes, but it will be destructive for the headphones ;) The neo magnets in the headphones are probably glued into a metal structure, so it could be tricky to get them out. Remember that neo magnets are brittle and will not accept too much brute force.

@tathaagatssiddhartth3439 8 жыл бұрын

+Brainiac75 thnx i will try to get them out tommrow!

@tathaagatssiddhartth3439 8 жыл бұрын

+Brainiac75 and yess just 2000 subscribers left.. if u remember me i asked about that will u do on 100000 subscribers... i know its a suprise!

@brainiac75 8 жыл бұрын

tathaagat s siddhartth Yep. A little more info about the 100k video in my latest video I just uploaded ;)

@undefinednull5749 Жыл бұрын

why working temp is so low compared to magnet Curie temperature ? A.k.a. the max temp before demagnetisstion begins?

@alphadextroxanthriem8267 9 жыл бұрын

Where do you get the neodymium magnets

@brainiac75 9 жыл бұрын

Android User I buy them online (eBay, magnetportal.de, supermagnete.de etc.). More about my recommendations in this video: kzfaq.info/get/bejne/n85dpcpnu9uudJc.html

@alphadextroxanthriem8267 9 жыл бұрын

Thanks

@anthonylumaad1454 10 жыл бұрын

can we use any kind of iron making magnets?

@SuperNuclearDeath 10 жыл бұрын

What do you mean by iron? For Neodymium magnets, you use Neodymium, Iron, and Boron.

@anthonylumaad1454 10 жыл бұрын

where can i purchase a neodymium magnets ? im from philippines please guide me... thank you

@Therapor 11 жыл бұрын

loooong time since your last video :(

@alexhsu190 10 жыл бұрын

I was just wondering because my apartment is really small and the only place I can place the magnet box is in my kitchen, and there is like a bunch of metal knives and electronics there :)

@BBadCraft 7 жыл бұрын

2:54 you should start a magnet asmr series

@TheMCCraftingTable 11 жыл бұрын

usually neodymium magnets are nickel plated, but what happens if a large neodymium magnet is coated by pyrolitic carbon?

@TheMCCraftingTable 11 жыл бұрын

wow thanks :)

@thelamb288 7 жыл бұрын

It would be great if you had a scale that had a maximum pressure guide. It would provide accurate PSI (or whatever) as to when the metal broke free of the magnet. You simply slide it back down to zero for the next test. Cheers

@brainiac75 7 жыл бұрын

I may be able to find an electronic scale that stores/holds the maximum weight measured if I ever need this measurement again in a future video.

@thelamb288 7 жыл бұрын

Brainiac75 Knowing you it will look and function perfectly :D Cheers

@Muonium1 11 жыл бұрын

I don't think there are any videos on youtube exploring the reduction of magnet power at very low temperatures. That might be interesting to see with a magnet put in liquid nitrogen. I would like to see someone do a nuclear magnetic resonance measurement of the free induction decay of protons in earth's magnetic field and then compared to the higher frequency when immersed in the intense field of one of these magnets.

@DRSDavidSoft 8 жыл бұрын

The dear beer! lol

@jesusjosegonzalezmeraz8645 10 жыл бұрын

Thanks for the intel, sorry about the beer.

@brainiac75 11 жыл бұрын

Quality over quantity ;)

@SoulFoxie 4 жыл бұрын

1:15 *Me: "Yep that seems 100% safe right there"*

@maxshootsfilm306 9 жыл бұрын

wot is the grad of your bigest magnet?

@brainiac75 9 жыл бұрын

Max Persson My largest magnet (6x2" disc magnet) is N45. In large magnets it is harder to reach the commercial limit at N52 since you need very high purity of the used chemicals and perfect crystal formation in the entire magnet simply is harder the larger the magnet is.

@maxshootsfilm306 9 жыл бұрын

wow dat is an strong magnet