NingBo BeiLun Meank Magnetics Co., Ltd
NingBo BeiLun Meank Magnetics Co., Ltd
Strong Magnets

Strong Magnets

Strong magnets can be made into certain shapes based on different application requirement.

These types of magnets include: disc magnets, square magnets/magnet blocks, ring magnets,  cylinder magnets, countersunk magnets, plastic coated disc magnets, cone magnets and arc magnets. All the shapes above are basic shapes for magnets of which  the material is neodymium, ferrite or SmCo.

We also have wide size range for each type of neodymium permanent magnets for sale.

Strong Neodymium Magnets For Sale

Strong Neodymium Magnets For Sale
  • Neodymium Disc Magnets
    Neodymium Disc Magnets
    disc neodymium magnets/disc NdFeB magnets/ neodymium magnet discs/ NdFeB disc magnets
  • Neodymium Blocks/Rectangle Magnets
    Neodymium Blocks/Rectangle Magnets
    Neodymium block/rectangle magnets also called as square/rectangular NdFeB magnets and NdFeB magnet blocks
  • Neodymium Ring Magnets
    Neodymium Ring Magnets
    Ring magnets means the magnets that in ring shape,someone call them magnet rings. Ring magnet is one of the common type for permanent magnets.The neodymium ring magnets (neodymium magnetic rings) are ...
  • Neodymium Cylinder/Rod Magnets
    Neodymium Cylinder/Rod Magnets
    Cylinder magnets express the same mean of rod magnets and magnetic rods.The neodymium cylinder magnets can be also called as neodymium rod magnets,they are cylinder magnets that made from rare-earth n...
  • Neodymium Cube Magnets
    Neodymium Cube Magnets
    Cube magnets(also known as cubic magnets) are special block magnets, which have the same sizes for length,width and height. They also also called as magnet cube blocks. The neodymium cube magnets are cube magnets that made from neodymium magn...
  • Neodymium Ball/Sphere Magnets
    Neodymium Ball/Sphere Magnets
    Sphere magnets are permanent magnet balls or magnetic balls. No matter ball magnet or sphere magnet,they just tell us the same shape for a permanent magnet.The neodymium ball magnets/neodymium sphere ...
  • Neodymium Countersunk Magnets
    Neodymium Countersunk Magnets
    Beside s of common shape—disc magnets, block magnets, cylinder magnets, ring magnets, neodymium countersunk magnets are also very important for daily life. Most of countersunk magnets /countersink ma...
  • Neodymium Tube Magnets
    Neodymium Tube Magnets
    Tube magnets are permanent magnets in tube shape. The tubes made of magnetic material are called magnet tubes of magnetic tubes. It becomes to be a tube magnet when make a hole through the axial of a ...
  • Neodymium Cone Magnets
    Neodymium Cone Magnets
    As neodymium magnets used more and more widely, common shape (such as disc magnets, block magnets, ring magnets, cylinder magnets ) can not meet all magnet application any more. For special situation,...
  • Neodymium Arc/Segment Magnets
    Neodymium Arc/Segment Magnets
    Arc magnet and magnetic tile
  • Plastic Coated Magnets
    Plastic Coated Magnets
    To realize the better effect of waterproof and resist abrasion, meank magnetics also developed out plastic coated magnets or plastic wrapped magnets. That is make neodymium magnets with plastic coated...
  • Adhesive Magnets
    Adhesive Magnets
    Adhesive magnets are used more and more in daily life. Someone ask what is adhesive magnet? Adhesive has not magnetism itself. Adhesive magnet(magnet with adhesive) is just magnet magnet with a 3M adh...

Different Types of Permanent Magnets

NdFeB magnets are divided into sintered and bonded types. Sintered neodymium magnet has the highest magnetic energy product, and known as the strongest permanent magnet.

Strong magnets can be SmCo material which known as rare earth magnets, when the working temperature is above 180℃, its maximum magnetic energy product (BHmax), coercivity, temperature stability and chemical stability are better than those of NdFeB magnets.The maximum energy product (BHmax) of SmCo magnets ranges from 16 MGOe to 32 MGOe, and its theoretical limit is 34 MGOe

The magnetic energy product of ferrite (ceramic) magnet is much lower than that of NdFeB and SmCo, but big ferrite magnets that have powerful magnetism are also called strong magnets.

Besides the above permanent magnetic material for sale, some permanent magnetic assemblies (such as pot magnets, strong fishing magnets, hook magnets) are also called strong magnets.

Here we just introduce some common shapes of neodymium strong magnets, and mainly for sintered neodymium magnets. Because of the high machinability, it can be machined into different shapes and very wide size range is available for each shape. Besides of disc, cylinder, ring and block, neodymium magnets can be machined into some special shapes, for example, countersunk neodymium magnets, sphere neodymium magnets, neodymium cone magnets, neodymium arc & segment magnets, and neodymium convex magnets.

How to Estimate Permanent Strong Magnets Qualified or Not?

Estimate strong magnets qualified or not, mainly decided by these aspects:

Magnetic performance property: magnetic performance of a permanent strong magnet depends on the formulation, which mainly includes remanence, coercivity, and magnetic energy product. Magnetic properties are the most important aspect of magnets and need professional instrument testing.

Tolerance of the magnets: the tolerance accuracy decided by the machineability of a factory. The machining equipment keeps updated as per market needs. Efficient devices and automation trends of industrial processing, not only meet the need of increasing magnets accuracy but also save manpower and cost.

Appearance of the magnets: appearance evaluation firstly depends on whether there are defects in electroplating; secondly, see if there is a lack of angle in the magnets.

Permanent Magnet Application

Neodymium strong magnets are more and more used for fabrics, such as neodymium sew-in magnets which can be sewed in curtains, and also sewed in clothes used as waterproof magnetic buttons.

Some small strong magnets are used for decorating fridges or used on fridges or whiteboards as memo magnets.

Strong neodymium magnets for heavy-duty hanging, the big neodymium hook magnets have hundreds of kilograms holding force and are used as magnetic ceiling hooks and wall hooks.

Strong magnets of neodymium are used for magnet fishing and searching, neodymium search magnets have a strong magnetic force and are used to get out the metal objects that fell to the bottom of the river and wall.

Strong neodymium magnets are widely used for producing motors, by using neodymium magnetic tiles, the performance of motors is more stable.

Strong neodymium magnets are used for making speakers, due to the outstanding magnetic performance, strong neodymium magnets make the size of the speaker the smallest.

Neodymium strong magnets are widely used for magnetic separating, by using magnetic separator of neodymium strong magnets, the metal impurities are filtered more thoroughly from food or grain.

Permanent Magnet Specification


International Unit

Standard Data

Curie Temperature(Tc)


Maximum Operating Temperature(Tw)





Electrical Resistivity (ᵨ)


1.8x10⁻⁴  ~2.0x10⁻⁴




Recoil Permeability(µ rec)


Magnetization Field Strength(Hs)





Bending Strength



Temp. Coefficient of Br



Temp.Coefficient of Hcj



Surface Treatments for Neodymium Magnets



Thickness (Microns)





Silver Grey

Temporary Protection




Bright Silver

Excellent Against Humidity





Bright Blue

Good Against Salt Spray


Shinny Color

Excellent Against Salt Spray





Superior Against Humidity





Superior Against Humidity





Superior Against Humidity





Temporary Protection





Excellent Against Humidity&Salt Spray







Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases, Fungi and Bacteria,FDA Approved




Silver Grey

Excellent Against Humidity

Best Temperatures to the Use of Permanent Magnet

Every grade of neodymium magnet has a specific maximum working temperature as the below list,the best temperature should not exceed the maximum of the neodymium magnets.

Neodymium Magnet Material Grade

Maximum Working Temp.

Curie Temp.


176°F (80°C)

590°F (310°C)


212°F (100°C)

644°F (340°C)


248°F (120°C)

644°F (340°C)


302°F (150°C)

644°F (340°C)


356°F (180°C)

662°F (350°C)


392°F (200°C)

662°F (350°C)


428°F (220°C)

662°F (350°C)

The maximum working temperature listed above are values just associated with each grade of permanent magnet materials.  Actual values in your application may vary depend other factors, including the shape of the magnet, the performance coefficient or load line, and how it is used in a magnetic circuit.

Strong Magnets

Common Machining Methods of Strong Permanent Magnet

Grinding machining: for sintered NdFeB magnets, grinding machine needed for the surface of rough delivered magnets. Common used grinding machine methods for block NdFeB magnets are plane grinding, two end face grinding, inner circle grinding, out circle grinding.  Cylinder NdFeB magnets adopt coreless grinding and two end plane grinding. Irregular magnets (arc magnets and segment magnets) adopt multi-station grinding.

Drilling machining: processing cylinder magnets and block magnets into round tube magnets and block magnet tubes.

Cutting machining: processing round magnet rod and magnet blocks into round magnet discs and square magnet discs.

Profile machining: processing rod magnets and rectangle magnets into arc magnets, segment magnets, cone magnets, countersunk magnets, convex magnets, ball magnets and other complex shape magnets.

FAQs about neodymium strong magnets:

FAQs about neodymium strong magnets:
  • Q.
    What is the safety distance between super neodymium magnet and other items?

    The safety distance is just demanded for ferromagnetic objects and electronics. Ferromagnetic objects and electronics should be placed outside the magnetic field of the neodymium magnets.

  • Q.
    How long do neodymium magnets last?
    As long as the working environment and preservation methods are appropriate, the magnetic force of neodymium magnets can be maintained permanently. That's why they are called as neodymium permanent magnets.
  • Q.
    What is the strongest magnet on earth?

    The strongest magnet on earth is the strong neodymium magnet which has the highest magnetic energy.

  • Q.
    What is the material used in permanent magnet?
    Permanent magnets are usually made from ferromagnetic material, which includes iron, nickel, cobalt, and minerals such as lodestone.
  • Q.
    Why are neodymium magnets so strong?
    Neodymium magnets are so strong because they are highly resistant to demagnetisation. Due to its strong saturation, we can use smaller sized neodymium magnet to generate the same magnetic fields.
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