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Neodymium iron boron magnet

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Neodymium iron boron magnet
Neodymium iron boron magnet

neodymium iron boron magnet, china ndfeb supplier manufacturer exporter, super strong, fast delivery, good quality, low price, online sale, disc ring block


Neodymium Iron Boron magnets, referring to Ndfeb, Neo magnets also, have been used commercially in industrial field for over 30 years since 1984 in the world. Japan, USA, Europe was the main production base of ndfeb magnets. In the past 20 years, Chinese magnet industry stepped into fast-growing period due to rare earth raw material development, international neo magnet patent expiration, technical innovation. In 2003, China became the biggest supplier of sintered ndfeb, the total annual output up to 15000Tons.


Type of magnet of NdFeB magnets

As per manufacturing ways, neo magnets can be manufactured in the 4 following forms:

.Sintered – it is the strongest magnet among all magnets, called as “king of magnet”.  Raw matieral including Nd, Fe, B, other rare earth material mixed together as per certain proportion. Then it will be milled into fine powder. In oxygen isolation room, the fine powder is put into small die and pressed by hydraulic press machine or isostatic pressing machine. Then by high temperature sintering, the fine powder will be a solid material. This sintered material can be machined into different shapes with good tolerance. Coating is usually necessary for sintered ndfeb to resist rust.

 .Bonded – it is much lower in magnetic force, the magnetic energy is in the range of 10MGOe. NdFeB powder is blended with a plastic carrier material, die pressed and then heated. Bonded neo magnets can be in complicated shapes by die press , and no need further finish machining. Most importantly, the Bonded NdFeB materials are isotropic - i.e. they can be magnetized in any direction.

.Injection Molded – NdFeb powder is blended with plastic material like nylon 6, nylon 66, PS, et . Then it goes into special plastic injection machine and get wanted shapes. Injection molded NdFeB  have low energy in the 5 MGOe range, but can be made with extremely intricate shapes with multiple magnetized direction.

 .Extruded - though not popular at present, NdFeB based flexible magnets can be made by binding NdFeB powder with a carrier material and extruding the material into sheet or strip form. Its magnetic energy up to about 6 MGOe.


Advantages of sintered Neodymium Iron Boron magnets

--high strength

--Relatively small volume (by weight about 20 times Ferrite magnets to get same magnetic strength).

--Relatively easy to machine, compared to Alnico and SmCo magnets.


Disadvantages of sintered ndfeb

--Having maximum working temperature limits depending on grade. Higher temperature materials, however, tend to have lower maximum energy products.

--Most grades of NdFeB magnets need to be protected against oxidation - by coating or plating the magnets.


Surface Treatments

Painting, coating, or plating is generally recommended for NdFeB. Plating NdFeB require specialized plating techniques. The new plating factory is not able to achieve plating with good adhesion on Neo magnets. The sintered neo magnets are sent to plating plants. By chemical acid clean, the ndfeb magents will receive rolling plating or hanging plating as per shapes or different coating. Currently, zinc , nickel, gold, silver, epoxy coating is very successful and widely used.


Warning & Caution

1. The neodymium magnets are extremely strong. Fingers and other body parts can get severely pinched between two attracting magnets. Please handle with care to avoid personal injury and damage to the magnets.

2. The strong magnetic fields of neodymium magnets can also damage magnetic media.. Never place neodymium magnets near electronic appliances.

3. Never allow neodymium magnets near a person with a pacemaker or similar medical aid.

4. Children should not be allowed to handle neodymium magnets as they can be dangerous. Small magnets pose a choking hazard and should never be swallowed or inserted into any part of the body.

5. Neodymium magnets are brittle and prone to chipping and cracking.


Neodymium Iron Boron magnets for sale

We are professional supplier and manufacturer of neodymium iron boron magnets for sale for over 10 years. Our main products are for export. We can make all kinds of neodymium iron boron magnets for sale, strong neodymium iron boron magnet  , even super strong neodymium iron boron magnets for sale. All those grades including N35, N38, N40, N42, N45, N48, N50, N52, M, H, SH, UH, EH, AH, etc are available to you. We can accept  your custom made magnets including all kinds of shapes like block, square, ring, round, disc, cylinder, rod, arc segment. And we can carry out many kinds of magnetization ways on different magnets.  The necessary coating for protecting magnets are subject to your choice like zinc, nickle, gold, silver, sn, epoxy, etc.  Even small orders are acceptable. 

We only advise and supply suitable and good quality neodymium iron boron magnets to our clients.  


Magnet properties of Sintered NdFeb 

Below is pdf file for downloading or save it as magnetic-property-of-neodymium-magnet.pdf


How to send inquiry

Firstly, we 'd like you to send us your detailed requirement including magnetic grade, shape, size, tolerance, coating, magnetization direction, application, quantity, transportation ways, etc. Below are simple format, you may copy and fill it with your actual requirement , and send to us. So we will understand what you need exactly and give you favorable reply. 

Subject: Neodymium iron boron magnets
Grade: Like N35, N38, N40, N42, N45, N48, N50, N52, M, H, SH, UH, EH, AH.  
Shape: like Block, ball, ring, tile, disc, cylinder, special shape, etc
Size: L*W*H(for block), D*H(for cylinder), OD-ID*H(for ring),
Coating: like Nickle, Zinc, Epoxy, Sn, etc.
Magnetization ways: like through thickness, axial, radial, etc
Tolerance +/-0.1mm, +/-0.05mm, etc.
Quantity: 50000, 10000, etc. 
Transportation ways: Like by air, by sea, by courier, etc. 
Destination : Like air port, sea port, your city or company address, etc

For your conenience, please fill the below form and copy the above (remember to replace with your actual magnet demand), paste it.. Only by simple click" summit" , your inquiry will soon arrive at our sale staff and you will get soon professional response. If you want to know further about our " manufacturing capacity, quality control, price& payment, delivery terms" , please kindly check our

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