Blog of Neodymium Magnet from Osenc

Magnet Stop Water Meter

May 30, 2018/in News /by Osenc

In the last post, we talked about “magnet fishing”, and explain why that is a treasure hunter game, and how to help people to find the lost money. (In fact, we like to say creat wealth.) So in this post, we talk about something save money.

All of us know lots of ways to save money. Someone told us they will use the neodymium magnets to stop the Electric meter or water meter, even that is illegal. So here is the question, does this method really working?

let s check it

1. Does it illegals if we sell such magnets?

The sale and advertising of neodymium magnets will not take any criminally punish. It’s not drugs, so the Internet is full of websites where they are advertised, and sold. Some time there someone explains you which magnet is suitable for which water meter or electric meter. Sometimes such sites will be closed. But by the data of the Internet, the most actively selling, buying and using the neodymium magnets is the regions of Russia and Ukraine. many information about how to use the neodymium magnets from these regions.

2. Neodymium magnet – is it not the same as usual?
Everyone knows the usual magnet – ferrite, that is, it is made of iron. But is not iron, just like a stone. There are also some magnets what the main material is cobalt or nickel. Neodymium magnets are approximately one-third of the rare-earth metal of neodymium, slightly less than two-thirds are iron, and about 2% are boron. In small quantities, other elements can be added. Powders of these metals are baked in forms, but the resulting mass is quite fragile and, moreover, is susceptible to corrosion, therefore, nickel, zinc or copper-nickel coatings, sometimes with the addition of gold, are used to protect it. In order for such a product to become a powerful magnet, it is subjected to a special electromagnetic influence at the final stage of manufacturing.

3. Where do they get it?
The main supplier country of neodymium magnets in the world is China. There are the largest deposits of rare-earth metals, and neodymium is rare-earth metal. There are also factories for the production of neodymium magnets, so most of them are wrestlers with counters in popular Chinese online stores. we must say, the scale of trade is impressive.
The booming trade in neodymium magnets is also in some countries’ online stores. The prices there are higher, but the buyer is advised on which counter to put a magnet.

4. Are neodymium magnets the most-most powerful? And expensive?
Of all the magnets that are currently produced, neodymium – really the most powerful. There are many classes of neodymium magnets, depending on the temperature resistance. And the main disadvantage of a neodymium magnet is that at a temperature of 80 degrees Celsius, it begins to lose its magnetic function. The most powerful neodymium magnet is a magnet of class N52 with a temperature of the application up to 80 degrees. At temperatures above 100 degrees, neodymium magnets begin to lose his strength, and the higher the temperature, the greater. In neodymium magnets, the magnetic properties persist at a maximum of 199 degrees, and in samarium-cobalt magnets, up to 299 degrees.
The price of a magnet is determined by the price of neodymium, it is approximately $ 81-99 per kilogram. The disk neodymium magnet of 52×32 mm size costs on the same Chinese site about 1100 rubles. By the way, samarium-cobalt magnets are about three times more expensive.

5. And what factor stop what counters?
With the help of neodymium magnets, it is possible to stop water meters, electric and even gas meters. Counters differ in the principle of operation, design and degree of protection against extraneous interference. Thus, water meters according to the principle of operation are divided into tachometric, which can be wet and dry, and ultrasonic. Of these, only dry ones can be stopped by a magnet. And for someone who decided to fight communal accounts in such an illegal way, we have bad news: the counters of this group – more than 90% of all water meters installed in the apartments. And there will not be a fast transition to another type.
Electric meters are induction and electronic. At the same time, electronic devices are made with both a mechanical counting mechanism and a liquid crystal display. In turn, counters with a liquid crystal display can be with or without a transformer coil. And only this last kind of neodymium magnets is beyond control. The rest can be stopped, only the power of the magnets and the location of their installation will be different. As digital electronic counters are becoming more popular, the applicability of neodymium magnets to steal electricity is decreasing, but the pace, says frankly, is not high.
As for gas meters, most neodymium magnets do not work for most of today’s models. But there are those that can still be stopped. To do this, use the most powerful neodymium magnets with a clutch force of more than 200 kg.j

What is gauss in magnet business

May 26, 2018/in News /by Osenc

In this business, we often hear about Magnet Gauss, but we have a question now, what is Gauss? How much can Gauss be achieved with magnetism? How do we know how much Gauss does the magnet have? How much can Gauss be used for the commonly used N35 and N38? In this post, we would like to explain it to you, one by one in an easy way:

1. What is Gaussian
Gauss is a unit of magnetic field. 5000 Gauss represents your magnet with a maximum magnetic field of 5,000 Gauss.
2. How much can Gauss be achieved by magnetism?
This question is very general, and we do n’t know how to answer it and make you satisfied. Because the magnet’s magnetic level is related to many factors, such as the grade of magnets, the specifications of the magnet, the thickness and so on.
But we have collected some common specifications of magnet Gauss for your reference
Such as 10 * 4 N35 Gaussian material can reach about 3000-3200 Gauss, 10 * 5 to about 3400-3600 Gauss.
The surface magnetic field of a single NdFeB magnet is 3000-5000G, ferrite 300-800G, samarium cobalt, and AlNiCo 2000G. Neodymium iron boron should be considered as a very high permanent magnet, but it is difficult to reach 5000 or more.
3. How many Gaussian magnets are the largest?
N35, N38 is probably up to 2000GS. If the size is bigger, N35 can reach 3500GS at most, N38 can reach 3800GS. If there anyone tells you that he/she has a magnet above 10,000 gausses, you must marry him first, because he has new technology.
In general, the Gaussian surface of the magnet is such that it is inversely proportional to the area and is proportional to the thickness.
4. How do you know how big a Gaussian magnet is?
We usually use a Gauss meter to measure the Gaussian magnet surface. However, the Gaussian values measured at different positions on the surface of the magnet are different, and the Gaussmeters have different measured data, and the error is relatively large.
5. What is the difference between a Gaussian magnet and a magnetic flux?
Both Gaussian and flux measurements are made to determine the performance of the magnet. The reproducibility of magnetic flux is better than Gaussian, more stable, and the error is not too big.
Note: Gaussian (Gs) is the unit of measure for magnetic field lines. 1T=10000 Gs

What Adhesives use for Magnet

May 24, 2018/in News /by Osenc

There are lots of magnet in the market, but how to work with the different types of magnets? Like the neodymium magnet, ferrite magnet.

In this post,we would like to share you that what is different if we use different glues and adhesives. Even we will mention some specific glues. But as a professional magnet manufacturer, we don’t recommend any brand or any pratical glues.

So before we start let us talk a little bit about our self-adhesive flexible magnetic strip. Ours is a premium product which uses the taser for 965 adhesives. This is protected by a pink or red plastic backing strip. The adhesive holds instantly but it achieves its maximum hold in about two days. Although taser for 965 is a strong adhesive， it can be defeated by the weight of whatever it is that it is stuck to. so the key to using self-adhesive flexible magnets is to keep it for lightweight applications.

Right we’re going to start now by looking at ferrite magnets. These are sometimes known as ceramic or craft magnets. When you see these in craft shops，they usually have a dimple or a white spot on one side and this is to show you which side to put your a TC bond. We hope you can see the dimple there. The reason this has to be present is because with traditional crafting magnets. They are only magnetized on one face, the non-dimple face. So they will stick together that way , when you try to put dimple to dimple they don’t stick. We stopped stocking these traditional crafting ferrite magnets in 2012 , because we were inundated with complaints that they were simply not strong enough.

We moved to using a much higher grader Ferrite called c8 which are 2 to 3 times stronger and these are magnetized.So that one flat face is north and the other flat face will be south.This is your true regardless of whether or not this is a disk or a block or a ring.Ferrite magnets are extremely versatile and you can use almost any adhesive you want to. If you look at the tested in your local hardware or DIY shop, you will see the packaging usually tells you what each adhesive will work with. Ferric magnets can be cast as ceramics so you can use anything that will work on a ceramic. You just need to make sure that the item you are sticking the magnet to will work with the same adhesive.

So, for example, you can use a traditional hot-melt glue gun， PVA crafting glue.

Then there is the choice of using a strong PVA glue ，such as the no more nails range. Contact adhesives .Two-part epoxy resins or even super glue. You can also use sticky craft dot type adhesives. We don’t know if you can see this very well. These are produced by a company called fantastic other brands.

Of course , magnets .available, you simply peel the backing and then stick the glue dot onto the magnet.

Lastly, we’re going to look at neodymium magnets.These are the strongest magnets you can get and they can be very thin .Before you start looking at adhesives. We just want to remind you that neodymium magnets are extremely brittle and can and do break if they are allowed to jump together. They may look like solid metal but they are made from a sintered powder . So please do not attempt to flex them, bend them. They will snap in half. We have a range of self-adhesive neodymium magnets . These are sold in pairs as you can see that one side has got 3M 467 adhesive which is protected by an easy to peel paper tabbed backing .

This is only available on a selection of thinner magnets and is usually really.

Only intended for card or paper crafting because the adhesive works best on card and paper.

When it comes to using adhesives with other new neodymium magnets. You need to look for something that is going to work with metal.So traditional PVA glue and hot melt glue is not going to work, the magnets are simply too strong.

So looking at adhesives that can work with metals.We’ve had very good results using our two different types of contact adhesives.This one is my current favorite product the serious glue, other brands are available.

You just need to make sure it was with metal. You can also use the two-part epoxy resin and our old friend the cyano-acrylic super glue.We tend to use either the contact adhesive or the super glue. We don’t tend to use the epoxy resin very often simply. Because of the fears these two contact adhesives we’ve used.

We’ve had great success with both and use them on magnets up to 12 millimeters in diameter by 3 mils thick much bigger than that.And you do need to use an epoxy resin .we’ve also got our glue dots from fantas-tak.

These we have also used with neodymium magnets and they work well. These are their permanent craft dots. And see here. They’ve worked well and are holding things on our office frigate as well as on our racking. Do a quick recap ferrite magnets almost any glue you like, neodymium magnets. You need to use a contact adhesive a super glue or an epoxy resin

Use Cube Neodymium Magnets For Magnetic Levitation

May 21, 2018/in News /by Osenc

This post is part of our series on how to handle cube neodymium magnets safely. In this post, we are showing you how to safely put cube magnets together with the poles in a checkerboard pattern that is suitable for magnetic levitation. What you see is pyrolytic graphite being repelled by four cube neodymium magnets.

So let’s start with some tiny ones.

These can be arranged by hand alone but don’t for a second think they are weak! Just one of these will hold over a kilogram of iron. The only tool that we recommend for these tiny magnets is this simple locking board.

The iron plates underneath locks the loose magnets in place – or at least dampens the acceleration when putting the magnets together. These thin cube magnets are very fragile and will easily break if just thrown together. Alright. Here’s the checkerboard

pattern of north and south poles I’m going to make.

Let’s go ahead and take the first magnet off the stack… and place it on the locking board. The next magnet you need to turn 180 degrees before putting it on. The poles of the cube magnets can’t face in the same direction since only opposites attracts. Continue doing this and remember to turn every second magnet upside down.

There you go…

And now just some hints for restacking the cube neodymium magnets without breaking them. OK – what you’ve seen so far may be basic to most of you so let me raise the ante. These are tricky little bastards. They are just the size where they don’t look impressive like a huge one in some of our other posts but these will draw blood if you get pinched by them. Who said nerds don’t work out?

we have marked the north poles on these cube magnets with dots around the edges so we always know which two surfaces are the poles. Let’s build a checkerboard: Take the first magnet off the stack using a splitter tool. Put the magnet on the locking board with one of the pole surfaces pointing upwards. For the next cube neodymium magnet, you need a large wedge to slide the two cube magnets safely together.

Remember to turn the next magnet upside down so you’ve got opposite poles attracting each other. we will make a 3×3 pattern so let me just put another one on – mind the poles. Repeat until you have three of these 3×1 bars. Remember to keep them far apart so they don’t smash together. Take one of the bars and mind the poles. Take the next bar and put it upside down on the locking board following the rule of attraction between opposite poles.

Bring the bars together with the wedge in between and make sure the bars are aligned. Finish the project with the last bar. There you have it: nine powerful cube magnets put together with no loss of blood.

And here’s what they can do. Now for some hints on how we restock them. As always: Mind the poles.

How to Combine two large neodymium magnets

May 19, 2018/in News /by Osenc

If you have experience with two large neodymium magnet, you must be known that it is very dangerous to combine them.

So we would like to show you how to safely put two large neodymium magnets together. And with a spacer in between the magnets. And the most important point, without any magnets splitting and shrapnel flying around.

So – what do you think we should need?

Well, we think we should use thick gloves. And The thicker well be better. Wearing gloves will not prevent you fingers from being crushed if they are caught between the magnets in an accident. But they might make it easier to get your fingers unstuck again.

Next, we need a security board. This is just a wooden plate with some metal plates glued to the bottom half. You will also need what I call a locking board. It’s just a wooden board with a hole in it. The diameter of the hole should be the same as that of the magnets. And the height of the board should be the same as the magnet plus the spacer. Next, in line, we have a large wedge. The width of the wedge should be the same as the diameter of the magnet or larger.

At last, we need wear safety glasses. If the magnets accidentally smash together. They could shatter or chip sending very sharp fragments all around. Personally, we suggest using a complete face shield with these larger magnets.

Okay – after we have collected all of the necessary equipment we need to clear our work area. Remove all metals. Ya, all metal, so it means that it includes the keys in our pocket, our wristwatch, and our mobile phone. Also be aware of lamps, radiators, and metal in the table that could interfere with our work.

And now for the part that we have been waiting for. Let’s combine the magnets and see if we can do it without hurting ourselves or chipping the magnets.

First, place the security board in our work area with the metal plates facing downwards and away from us. Next, put one magnet on the board with its north pole facing upwards and let it slide into secured position over the metal plate. If we don’t know the polarities of our magnets we will show you how to determine

it in an upcoming post. Now place the locking board over the magnet and put our spacer on top of the magnet. If anyone thinks the next step is to put the other magnet with the north pole facing upwards and sliding it over the spacer they would be completely wrong. If we thought that we are not ready to handle large neodymium magnets yet.

Let us show you why.

Here we have – somewhat simplified – drawn in green color two of the magnetic field lines from the first large neodymium magnet. Notice the direction of the magnetic field indicated with arrows. If we put the second magnet in this magnetic field with its north pole pointing upwards it would act like a compass and try to turn around with a large force. This is an uncontrollable position to combine the magnets from. Instead, we need to put the wedge over the spacer and guide the second magnet in from far above, Again with its north pole facing upwards. Hold the magnet and wedge firmly and make sure our fingers are not between the two magnets.

If anyone feels resistance in the second magnet your polarity is wrong.

Abort immediately by lifting the second magnet straight up and turn it 180 degrees around before trying again. And then slide the wedge slowly away making sure that the wedge and the second magnet are aligned directly over the spacer. The force needed will be higher and higher with the magnets coming closer and closer. Adjust the second large neodymium magnet so it’s centered over the hole in the locking board. Lift off the locking board and slide the magnets from the security board by pushing on the lower magnet. Do not push on the spacer or the upper magnet. Finally, we did it done. In an upcoming post, we going to show you how to take them apart again.

Combine 2 PCS Super Neodymium Magnet

May 17, 2018/in News /by Osenc

This is a post just want to show you our mad magnet experiments. This will be our craziest so far. We are sure you haven’t seen this before. We’ll attempt to combine two 6×2 inch neodymium magnets. It is very dangerous and a hard work. Because of magnets with a rated pull force of 1200 kg each. Is it even possible or will us fail and end up with an expensive pile of magnet crumbles? We will show you the result.

Before the testing, we should remind you that, Neodymium magnets are not toys! Do not handle magnets of the shown size unless you know and accept all the risks involved.So why would we even attempt this? Because we know most of the people will interested at that, but as it also a dangerous testing. So let us take the risk.

Both of them are 6x2inch. Since then we’ve been planning how to combine the two magnets in a controlled way.

Neodymium magnets are brittle like a ceramic dinner plate and with a ton of pull force – literally – this project is more difficult and dangerous than you might think. It takes some preparation to avoid chipping or even shattering the magnets.

We have used wedges made of hardwood in the past but they are not solid enough for larger magnets.we hope these felling wedges made of plastic are the solution.

They are designed to be solid and not pop out when the weight of a tree is pushing down on them.But our worry is not them falling out. Getting them stuck in the pinch between the magnets is the problem. So we will off with the spikes.So far it’s been a one-man project to combine our magnets.

As this testing is very dangerous and we worry about the magnet will stuck. So we call for a secret helper. Helper has absolutely no experiences in handling powerful magnets but will more than double our forces in men versus magnets.

The first magnet is placed with its south pole facing upwards. And the heavy wedge is placed over the magnet.

We double-check the polarity and notice the low gauss reading above the wedge.

25 cm or 10 inch from the magnet. It is only 1% of the gauss reading flat at the surface of the magnet. Nicely low for safety but we still secure the wedge with some old belts to make sure the bottom magnet isn’t suddenly set free. The other magnet is placed in a carrier to make sure we never have our fingers between the magnets – again with the south pole upwards.

After an easy lift on it is time for the slide. One man pulling the wedge and one man pulling the magnet in opposite direction and trying to keep everything centered over the bottom magnet. And we can hear a sound which is the bottom magnet lifting up from the ground.

The magnets are now pinned on each side of the wedge. After reaching the plastic part the forces are now too high for this to work.

Even with the secret helper pulling so hard that everything slides across the carpet the magnets are not coming any closer.

We are so worried about that is this where it ends?

Time to come up with a plan B.

We decided to turn it into a tug of war.

Two men at one end and the two magnets at the other.

By a flaw in our design, it is possible for the wedge to go off-center. So of course, it happens…Off-camera we managed to center the wedge a millimeter at the time with a lot of twisting and manhandling.

After the final pull! However, it didn’t last long before something shook us. The noise was loud and unexpected! Still not sure what made this sound?

Your guess is as good as mine. After checking nothing bad has happened, so we carry on.

What a relief at that moment. The magnets are not stuck on the wedge and no humans or magnets were harmed. Only damage is a bite to one of the felling wedges. A tiny bit is stuck between the magnets but it is so flattened that it isn’t a problem. The magnets aren’t perfectly centered but with an awkward technique, we manage to align them.

Once all of the edges are aligned the magnets will not move anymore.They feel like welded. So here it is a 6×4 inch neodymium magnet.

More compact and safer to store than the two separate magnets and with a solid magnetic field. As you can say our table isn’t all wood.

We are so happy that this experiment ended so well. Maybe in future, we will think about how separate it.

When the neodymium magnet meets the electronic product

May 15, 2018/in News /by Osenc

Most of the people were told that”Don’t put the magnet close with the electronic product. Because the electronic product will be damaged.” Is that true? And is there anyone know what the damage is?

In this post, we’ll test what happens when we put a very powerful 6-inch neodymium magnet close to the electronic product, like a PDA, a calculator, different TVs and a computer.

Some will survive, others… well let’s just see…

First up is the iPAQ.

No, not iPad – the iPAQ. The PDA which is like a smartphone but just without the phone. When we put it on the magnet, the PDA decides to turn itself on. It never did before. Other times it completely reboots. However, it does seem to work even when directly on top of the magnet. The magnet did break the battery lid into pieces but there was no instant electrical death.

The PDA did refuse to turn on at some point even though we held the battery in place. This was solved by taking the battery out and putting it back in. The li, however… never worked again…

The calculator worked flawlessly. It could do simple math, dividing by zero was still a major error. And even a sine-wave graph looked alright. It does help that the backplate and battery lid are held by screws. Very impractical when changing batteries but good for fighting a magnet.

Next on the test bench is a 21 inch TV.

Let’s first try our largest ferrite magnet on it. As you see that it is much smaller and ferrites are around 10 times weaker then neodymium magnets. So we should see a big difference in the effect on the TV. The four-inch ferrite magnet has an effect at around 30 centimeters from the TV. But the six-inch neodymium magnet at around 150 centimeters. And when there at zero distance the difference in strength is very noticeable and gives a quite beautiful show. That will be very cool, if you can watch it by video.

But why does the image react on the magnet?

Here’s the simplified explanation. The image is drawn using electrons that have an electric charge and therefore react in a magnetic field. A transformer delivers high voltage to a vacuum tube and this electron gun that emits electrons. The electrons coming out of the electron gun are focused to a beam using coils that are basically electromagnets. The coils can also guide the beam from side to side and up and down and in this way draw the image. But the electrons will also follow a strong external magnetic field. This almost looks like a screensaver – although it is doing anything but saving the screen. Flat screens don’t use electron beams so they are not affected in the same way. We did, however, manage to dim the background light on this LCD TV. Alright, this is the final fight.

We recommend at least two meters distance between this big magnet and

a computer but here we are at 1 meter. The monitor is reacting to the magnet but no instant death for the computer. Let’s go closer. At 60 centimeters the monitor has messed up but still no dead computer. It may have lost data but the picture We test with is still there.

No more mercy. Let’s try at 8 centimeters. This is dangerous. Not only for the computer. The monitor is throwing up all over the place. The computer is still working…

In order to avoid destroying ourselves, we wouldn’t go closer than four centimeters which is painful enough…After adjusting the screen we opened the picture again. But the picture folder seemed to be gone? And then, the result is it is dead. Later, the mouse pointer froze and we realized that the computer was dying. We killed it.

We have officially killed a computer with our 6-inch neodymium magnet.

And then something happens. Without any error message, the computer had restarted. After an error message about time and date not set we pressed F1 to boot and all we got were a blinking cursor and plinking hard drive. We hope maybe it would help if we removed the magnet. But the poor thing is the disk controller failure. That’s too bad. Later we tried to restart it again and received different errors. It never recovered.

The conclusion of this post is that neodymium magnets must be kept away from things you don’t want to destroy. But you can have a large neodymium magnet in your home without blowing all the electronics into your backyard.

At two meters distance from even the 6-inch magnet. The Earth’s magnetic field is the strongest so just keep a distance.

4 Guideline in Neodymium Magnet Purchasing

May 9, 2018/in News /by Osenc

This post about shows you how to handle large neodymium magnets safely and sometimes test their power just for the fun of it… we were often asked what neodymium magnet would be good for a beginner who would like to try the power of neo-magnets but has no experience with their power. In this post, we will try to answer this question based on our experience as the best Customize NdFeB Magnet Manufacturer. We don’t believe there is such a thing as a perfect beginner magnet that will suit you all. But we will set up some guidelines for what beginner should look for.

Don’t buy big neodymium magnet

Well, neodymium magnets are simply, and the most powerful permanent magnets ever invented. Only electromagnets can be stronger so if you have had fun with weak ferrite magnets you’ll most likely love neodymium magnets. However great power comes with great responsibility. A large neodymium magnet is dangerous. The big ones can easily crush the bones in your fingers beyond repair. Ya, beyond repair, in another word means that the bone will be crushed to be small pieces. So you should pay attention to the large neodymium. That does not a toy. For that reason, the most important thing to consider when you want to buy a neo-magnet is “size”. Do not buy a large one as your first time. Practice with smaller magnets and scale up as you gain experience. Large neo-magnets are powerful and expensive. So buying one as a beginner is like taking your driving license in a Ferrari. It could be fun but will most likely quickly end up being very expensive and bloody.

The size of magnet

So how big is large in this context? It may be smaller than you think. This is a 20 mm cubed neodymium magnet. It doesn’t look scary but this is more than enough to give you a nasty bite. In the past post, we showed how this magnet can lift over 20 kg. Imagine having skin pinched between the magnet and a solid metal bar. A 20 mm cube will easily give you blood blisters or even bite skin off. It will however not break your fingers but this magnet is the largest we can recommend for a beginner. If you’re not a responsible adult or don’t like the pain you should start smaller. This magnet is more controllable but still large enough to do some weight lifting. A typical fridge magnet will not lift 8 kg. So to sum up about size: buy smaller than you think and train yourself before going large.

The Shape of magnet

The next guideline is about the shape of a nice beginner magnet. There are a lot of shapes to choose. But we are only gonna show you the most common. Stay away from the more specialized shapes not shown. A beginner magnet should be simple, cheap, easily available and easy to handle safely. Here’s a common sphere magnet This is not recommended for a beginner. They are more difficult to produce than common shapes, so that is why their price is more expensive.

The poles are just tiny dots on the surface so they don’t have impressive lifting force. There’s simply not much magnet touching the material you want it to stick to. This also makes them self-destructive. There’s a lot of force on a tiny area on the poles so the coating will over time crack or wear off. The magnet will then corrode rather fast so sphere magnets need special handling and storage.

Not the easiest shape to handle. So how about a square magnet? It’s better since it has large pole surfaces that are easy to spot with the naked eye. However, it has sharp corners that will bite you hard if your skin is trapped. This one is also very thin. we don’t like thin magnets since all neodymium magnets are brittle. They look, feel and even sound very solid – like metal – but they are not! The shiny metal coating is very thin and only there to prevent corrosion. The magnetic material inside the magnet is a crystalline structure comparable to ceramic – like a dinner plate – so neo-magnets will easily break, chip or even shatter if they are not handled carefully. We always treat them like they were made of glass and never let thin or large magnets fly together or you could have sharp shrapnel flying around…

Here we have two disc magnets of roughly the same volume but we would prefer the thick magnet to the left. It is mechanically stronger and less prone to break in half. In practice, it will also feel magnetically stronger on small objects like a paperclip because there’s more magnet under each point on the pole surface. Okay, so a cube magnet would be a nice starter magnet? No… we do love cube magnets. They are our personal favorites but they are not nice beginner magnets. They still have sharp corners that bite hard and you can’t tell where the poles are with the naked eye. This can get you into trouble. Here are two cube magnets put together.

And then let’s see what happens when we try to turn them around. Here it is in slow motion. Notice how close we was to getting our skin pinched. It happens way faster than we can react. The problem was that they were not put together pole to pole like shown here with the south pole marked with blue. They were instead put together side to side like shown here. This should not be twisted but the magnets come unmarked from the factory so a beginner may mess it up. Not pleasant with 20 mm cubes like these. Therefore our recommendation goes to the disc magnet as the best shape for a beginner. No sharp corners, poles are easy to spot and it is a very common shape with a lot of sizes to choose from. Perfect!

The grade of magnet

Next up is the grade of the magnet. we have written a post about the magnet grade so we are not going to go into details about that. But all you need to know is: the higher number in grade the stronger the magnet. The higher grades are more expensive but since a beginner should look for a small magnet. we will recommend a medium to high grade. In smaller magnets, a higher grade does not add much to the price.

The coating of magnet

The last guideline is about coating and this is the least important. The standard for neodymium magnets is a triple-layer coating of nickel-copper-nickel. This is good for a beginner magnet. There are other more advanced options but you don’t need them and other coatings limit the selection of magnets and often add to the price. For example, you can find some with the fourth layer of gold. It looks great but it doesn’t make the magnet perform any better. So no need to go for the more specialized coatings. Alright, that was our guidelines for choosing your first magnet.

Where to buy magnet

But where can these magnets be bought? we haven’t heard of a dedicated shop where you can walk in and pick up a selection of neodymium magnets off the shelves. It would also be a nightmare to handle. we did however find a few neodymium magnets for sale in a physical shop in the section with whiteboards but these offers are generally of low grades N35 or so to keep them as cheap as possible. They can be an easy and fast solution if you just want to give neo-magnets a try but if you want a large selection and some strong grades you should search for dedicated web shops. But then you run into another problem. The shipping is expensive for a single magnet. They need to ship it as a package. They can’t just ship it in an envelope because it may get stuck to something before arriving at your place. And web shops have a minimum value that you have to order. They simply lose money if your order is only a single 50 cent magnet they have to spend time on handling and shipping. Fair enough. So for a beginner, we can recommend a sample selection of magnets which some web shops offer. Here are the best sets we found so far. Unlike other sample sets, I’ve seen these don’t just come randomly stacked in bubble wrap but in boxes with foam inserts. we really like this organized solution. This is the set with tiny magnets. A great collection but too small if you are aiming for a lot of power.

The medium set is more powerful and may be the best choice for most. But for the same price, you can get the set with larger magnets. This set includes some nice disc magnets and is highly recommended – just be careful when removing the magnets. They are packed a little closer and may attract each other if you’re not aware when lifting a magnet out of the foam. Pull the magnet straight up and away from the other magnets. Oh! By the way… This set is called the macho set and it is not for beginners.

Hopefully, this will all help you into the world of neodymium magnets without too much pain. Feel free to ask questions if you’re still in doubt.

What Are Grades of Magnets?

May 8, 2018/in News /by Osenc

When shopping for neodymium magnets you will meet a term called ‘grade’ which is typically shown as a capital N followed by a two digit number and maybe some extra letters. Look like, N45, N52, 38EH,40UH,30SH,33M, 33H. But what are grades of magnets?

what does grade mean?

OK, Let’s explain it to you. About the grade, it is a measurement of how strong the magnetic material used in the magnet is. People like to call it how concentrated the magnet is because a magnet’s total strength depends on much more factors than just the grade. But if you have two magnets with the same size and shape. And one is grade N45 and the other is N52, the grade N52 magnet will be the strongest since it is more concentrated.

The N stands for Neo which is short for neodymium and tells us that this is, of course, a magnet of the neodymium type. There are generally four types of magnets commercially available but we will focus on neodymium magnets and compare them a little with the ferrite magnets, which are the most common. The number after the N stands for maximum energy product in MGOe. It is really complicated for some people – and we think of it as the maximum strength of the magnetic material. And then, there one question. Does the N45 magnet is a neodymium magnet with an energy product of 45 MegaGaussOersteds?

The answer is Not necessarily. Neo magnets are made of a crystalline structure that is impossible to make perfect every time in all of the magnets at an atomic level. So no two magnets are exactly the same. Just like that no same leaf in the world. The industry has therefore accepted a range for each grade. The final energy product for an N45 magnet is between 43-45 MGOe. In the high-grade N52 – where the limit of mass production seems to be at the moment – it is even harder to achieve perfection. Especially in larger magnets. So if you just want to by a big size customize 100% N52 Neodymium in big quantity, the price will be very high. And hard to find the supplier. Most of the time, the range is sometimes 49-52 or even 48-53.

Check the seller’s specifications. These ranges for each grade also makes it very hard to predict how a similar sized N52 magnet is stronger over an N45 magnet. It isn’t just 16% but could be at least anything between 11-21%. In practice, it can be even lower. A practical rule of thumb is 1% more pull-force for every extra MGOe. That is 7% more strength in an N52 over the similar sized and shaped N45 magnet. In fact, they are both very strong.

Compare with other magnets

Let us just compare their strength with the ferrite magnets. That is most of the people are familiar with the fridge magnets. Let’s say that the ferrite magnet is equal to the strength of a beer. How strong is a neodymium magnet then? Well, we think it’s more like vodka. You can get work done with ferrite magnets – like beer will get you drunk. You just need a lot bigger volume compared to neodymium magnets and vodka. By the way: Do not drink while handling large neodymium magnets. They can crush you beyond repair. ok – let’s just test all this theory with a real life measurement. Using a small steel bracket and a fish weight scale we will test how much pull-force it takes before the magnet gives up. Hmm… the ferrite magnet gave up before we really got started. Now I’ll battle the neodymium magnet. Now that’s what we call a magnet. Given that this was a crude ghetto- style test and the ferrite magnet used was 50% thicker, we think it is fair to conclude that as a rule of thumb neodymium magnets are on average ten times stronger than ferrite magnets. So the conservative rule of thumb for comparing neodymium grades can’t be used when comparing neodymium and ferrite magnets. They are simply in different leagues.

Extra Letter on the grade

Finally, let us explain the extra letters that sometimes are at the end of the grading. These are codes for how well the magnet withstands high temperatures. The standard neodymium magnets with grades without letters after the number can generally withstand temperatures up to 80°C. If heated above this they will lose some of their magnetic strength even after being cooled down again. And we can call this anti-magnetic（demagnetize）. And our N38SH magnet can withstand up to 150°C. The disadvantages of these high-temperature magnets are their lower strength and often higher price. To make a neodymium magnet more heat resistant the perfect formula for the crystals: 2 atoms of neodymium, 14 atoms of iron and 1 atom of boron is thinned out by other elements. For example, some of the neodymium can be replaced by dysprosium or praseodymium and some of the iron can be replaced by cobalt. If you want to know more about size against grade you can visit our website.

Why so hard to find N52 magnet manufactory

May 6, 2018/in News /by Osenc

N52 Magnet, lots of people hear his name, and someone just confuses that is there really exist? And why it is hard to find N52 NdFeB magnet manufactory.

The N52 NdFeB neodymium-iron-boron magnet material is indeed existent, and there are indeed technologies that can produce such high-performance materials. However, the materials available on the market, and better than N48 and N50, it is the best in N grade. So N52 is the normal circulation material on the market. But was rarely used in the market.

And why it is so rarely on the market? Let ‘s introduce to you.

At first, we should know what does N stand for? As you know, if we divided the magnet according to the temperature, there are many grades, like N grade, M grade, H grade, SH Grade and so on. And the N grade means that the magnet will demagnetize if the temperature over 80 degrees.

Highest Magnetic

The N52 grade NdFeB magnet has the highest magnetic in N grade. So we can know that the surface Gauss of N52 5*5 is more Gaussian than the surface of N45 5*5. In the testing, if we take 3 magnet, same shape same size but different grade, and we will found that, the N52 neodymium magnet is stronger 14% stronger than the N45 neodymium magnet and 60% stronger than an N35 neodymium magnet. In normal, N45 magnet will be a good choice for lots of production solution.

N52 does not a good choice, because magnetic is too big, not too many customer need so big magnetic magnets.

Expensive

Compare with other grade magnets, the N52 grade is expensive. In normal, the material of N52 almost 10USD/KG higher than other grades magnet. Maybe you are wondering why the material is so high. That’s because N52 is not easy to produce. It needs a special formula to produce. In China, even lots of countries, not too company know how to produce it. But Osenc did it. In fact, Lots of customer from other countries buy N52 from us.

Hard to product

NdFeB magnets are as hard to find as antiques, and they are limited by the sintering technology of modern NdFeB magnets, and Japan’s Sintering technology is indeed able to sinter to produce materials that are truly compatible with N52 NdFeB magnets. Normally, the N35 NdFeB magnet material has a F64*54*35. Under normal circumstances, the magnetization direction of the NdFeB magnet material will not exceed the length and width of the material, because if the material is magnetized Once the direction is higher than the length and width of the material blank, the orientation of the magnetization of the magnetic molecules cannot be agreed.

In other words, magnets cannot be magnetized, so high-performance N52 neodymium-iron-boron magnets are used in production. The technical difficulty in the process and sintering process is more difficult than the production of the N35 material. So not too many manufactories can offer customer N52 Magnet.