Neodymium Magnets

Professional Neodymium Magnet Supplier

Zhaobao Magnet Group is one of China's earliest enterprises engaged in the production of rare earth permanent magnet products. Through years of development, we have grown into a large-scale, comprehensive supplier of permanent magnet products, integrating R&D, manufacturing, and sales. Our products include Neodymium iron boron magnets, Samarium cobalt, Ferrite magnets, Bonded neodymium iron boron magnets, Rubber magnets, and requirements of a variety of permanent magnets and its components.

Neodymium Disc Magnet
We manufacture high-performance N45/N52 grade neodymium disc magnets for consumer electronics, industrial automation, and building applications. With vertically integrated production processes and...
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Strong Disc Magnet
A special type of NdFeB magnet that has become popular in recent years is the N52 disk magnet. The energy product of N52 strong disc magnet is the highest grade. So they can generate incredibly...
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Powerful Disc Magnet
Powerful disc magnet is currently the highest performing permanent magnet , which is widely used in aerospace, defense, electronic communication, and other fields. We have a complete industrial...
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Rare Earth Disc Magnet
Rare earth disc magnet has different temperature resistances depending on their manufacturing materials. Rare earth disc magnet is classified based on their manufacturing materials. The higher the...
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Neodymium Ring Magnet
The neodymium ring magnet is a specialized type of permanent magnet, typically manufactured from high-strength magnetic materials like neodymium or samarium cobalt. Its distinctive donut shape,...
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Strong Ring Magnet
Strong ring magnet is a special shaped magnet, usually made of strong magnetic materials such as neodymium or samarium cobalt. Its main features include the circular magnet is shaped like a donut...
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Powerful Ring Magnet
Powerful ring magnet is a special type of permanent magnet, typically made from high-strength magnetic materials such as neodymium or samarium cobalt. Their distinctive circular shape, with a...
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Rare Earth Ring Magnet
Rare earth ring magnet is a special type of magnet that is made of strong magnet raw materials, for instance neodymium or samarium cobalt. Its main characteristics include a annular magnet shape...
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Neodymium Block Magnet
Neodymium block magnet has extremely powerful magnetic properties and can adsorb metal objects far exceeding their own weight. They also have steady magnetic properties and can maintain their...
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Strong Block Magnet
Strong block magnet has extremely strong magnetism and can attract metal objects far heavier than themselves. Their magnetic performance is stable, and they can maintain magnetism over a long...
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Powerful Block Magnet
Powerful block magnet products release exceptional magnetic force, capable of attracting metal objects more heavier than their own weight. Powerful block magnet keeps stable magnetic...
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Rare Earth Block Magnet
Rare earth block magnet offer exceptional magnetic strength, capable of attracting metal objects much heavier than themselves. Rare earth block magnet maintains stable magnetic properties over...
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Why Choose Us

Quality Assurance
The company has a variety of advanced production, inspection equipment more than 3000 sets, effectively ensure the quality of our products and delivery requirements. The purity of our products can reach over 95%, compared to the industry average of only 80%.

Customization Services
High quality grades from N28 to N52, even high-temperature resistant magnets, with geometric shapes of various thicknesses. Magnetic direction, coating material, size and material can be customized according to customer requirements.

Production Market
We have extensive and deep cooperation with many world famous enterprises in China and even the world. Such as: Ge Ford Samsung Hitachi Haier Xiaomi Foxconn Disney, etc.

Technical Certification
The Group has passed IATF16949, ISO9001, ISO14001, ISO45001 and other international authoritative system certifications.
The products of the group have obtained various authoritative certificates such as CE, CPC, ROHS, REACH, EN71, CP65, ASTM, CPSIA, etc., and are the only magnet factory in China that has the ability to pass CHCC certification.

Specification

Product Name	Neodymium Magnet, NdFeB Magnet
Material	Neodymium iron boron, Neo Magnet, Nd Magnet, Rare earth Magnet
Grade & Working Temperature	Grade	Working Temperature
	N30-N55	+80℃ / 176℉
	N30M-N52M	+100℃ / 212℉
	N30H-N52H	+120℃ / 248℉
	N30SH-N50SH	+150℃ / 302℉
	N25UH-N50UH	+180℃ / 356℉
	N28EH-N48EH	+200℃ / 392℉
	N28AH-N45AH	+220℃ / 428℉
Tolerance	Lowest can reach ±0.01mm

Types of Neodymium Magnets

Neodymium Disc Magnet

Neodymium disc magnets utilize axial magnetization, meaning that one of the circular faces serves as the North Pole, while the other circular face serves as the South Pole.

Neodymium Ring Magnet

The neodymium ring magnet is a specialized type of permanent magnet, typically manufactured from high-strength magnetic materials like neodymium or samarium cobalt.

Neodymium Block Magnet

Neodymium block magnet has extremely powerful magnetic properties and can adsorb metal objects far exceeding their own weight.

Neodymium Arc Magnet

Neodymium arc magnet is usually curved, mostly in the form of segments or tiles, and are typically considered arc-shaped magnets.

Neodymium Countersunk Magnet

Our neodymium countersunk magnet is a cornerstone of modern industrial design, offering unmatched holding power in a compact form factor.

Neodymium Special-shaped Magnet

Our neodymium special-shaped Magnet represents the pinnacle of custom magnetic engineering. Unlike standard blocks or discs, these magnets are designed and manufactured to meet unique spatial and magnetic flux requirements.

Advantages of Neodymium Magnets

Strongest magnet: Neodymium magnets are the strongest permanent magnets available commercially. They have a high magnetic field strength and can generate a powerful magnetic force, even in small sizes.

Compact size: Neodymium magnets have a high energy density, meaning they can store a large amount of magnetic energy in a small volume.

Wide temperature range: Although neodymium magnets perform optimally at room temperature, specific grades are capable of withstanding high-temperature environments.

Magnetic stability: Neodymium magnets possess exceptional magnetic stability; they exhibit extremely strong resistance to demagnetization, thereby ensuring long-term performance and reliability.

Improved efficiency: Neodymium magnets deliver higher power output, thereby enhancing performance, reducing energy consumption, and improving overall efficiency.

Precise control: Neodymium magnets offer precise control over magnetic fields due to their strong magnetic force.

Application of Neodymium Magnet

Electronics
Neodymium magnets are extensively used in electronic devices due to their compact size and strength.

Medical
Neodymium magnets are used in MRI machines to generate the strong magnetic fields necessary for detailed internal imaging.

Automotive Industry
Neodymium magnets play a crucial role in the automotive sector, contributing to improved efficiency and performance.

Aerospace and Defence
Utilised in various military applications, including sensors, actuators, and communication devices, neodymium magnets are valued for their performance and reliability.

Lifting Machinery
In industrial settings, neodymium magnets are used in lifting machinery. It's used to move heavy ferrous objects, such as steel plates and beams.

Surface Coating Options

Ni Plating Magnet

The surface of stainless steel color, anti-oxidation effect is good, good appearance, internal performance stability.

Zn Plating Magnet

Suitable for general requirements on surface appearance and oxidation resistance.

Gold-plated

The surface is golden yellow, which is suitable for appearance visibility occasions such as gold crafts and gift boxes.

Epoxy Plating Magnet

Black surface, suitable for harsh atmospheric environment and high requirements of corrosion protection occasions.

Comparison of Magnetic Field Distributions

The table below helps you understand how the magnetic field distributions of magnets differ:

Magnet Shape	Magnetic Field Lines Pattern	Field Distribution	Attracting/Repelling Behavior
Disc Magnet	Lines loop from face to face	Concentrated at faces and edges	Strong attracting and repelling
Bar Magnet	Lines spread from end to end	More spread out, less focused	Good for attracting, less for repelling
Ring Magnet	Lines loop through center hole	Uniform around ring, less at center	Balanced attracting and repelling

Physical and Mechanical Characteristics

Density	7.4-7.5 g/cm3
Compression Strength	950 MPa (137,800 psi)
Tensile Strength	80 MPa (11,600 psi)
Vickers Hardness (Hv)	560-600
Young's Modulus	160 GPa (23,200 ksi)
Recoil Permeability	1.05 µrec
Electrical Resistivity (p)	160 µ-ohm-cm
Heat Capacity	350-500 J/(kg.°C)
Thermal Expansion Coefficient (0 to 100°C) Parallel to magnetization direction	5.2 x 10-6 /°C
Thermal Expansion Coefficient (0 to 100°C) Perpendicular to magnetization direction	-0.8 x 10-6 /°C

Manufacturing Process of Neodymium Magnets

Sourcing Raw Materials
The journey of a neodymium magnet begins with the sourcing of raw materials. Neodymium magnets are primarily composed of neodymium, iron, and boron, along with small amounts of other elements to enhance their properties.

Melt Spinning
The raw materials are then melted together in a controlled environment to create an alloy. This process, known as melt spinning, involves rapidly cooling the molten mixture to form a thin ribbon of the magnetic material.

Milling and Pressing
The cooled alloy is then milled into a fine powder. This powder is subsequently pressed into the desired shape of the magnet, such as bars, discs, or more complex configurations.

Sintering
The pressed magnet is then sintered, a process that involves heating the compacted powder to a temperature below its melting point.

Magnetization
After sintering, the magnet is magnetized, or oriented, in a strong magnetic field.

Coating
To protect the magnet from corrosion and enhance its durability, a coating is applied.

Quality Control
Throughout the entire manufacturing process, we implement rigorous quality control measures. Every batch of magnets undergoes testing for magnetic field strength, uniformity, and physical integrity to ensure compliance with our high standards.

Packaging and Shipping
Once the magnets have passed all quality checks, they are carefully packaged to protect them during transit.

Customization Process

Custom Requirements

Start by provide your requirements for custom neodymium magnet product. This can include information on the magnet’s size, shape, strength, coating, and any other special features that the customer may need.

Scheme Design

Based on the your requirements, design the magnet using specialized software such as SolidWorks or AutoCAD. This will allow our to create a 3D model of the magnet, which can be used to verify that it meets the your requirements.

Select the Materials

Choose the appropriate neodymium magnet materials for the specific application of the custom magnet, as well as any other materials needed for the manufacturing process, such as adhesives or coatings.

Sample Confirmation and Production

Before officially commencing mass production, we will first send you samples for your confirmation. Using the design and material selections as a guide, begin fabricating the magnet.

Package and Deliver the Magnet

Once the magnet has been tested and approved, package it carefully to ensure that it is protected during shipping. We will unconditionally resend the product if there are quality issues.

Shipping and Delivery

Packing	1. White inner box with cotton plastic. 2. Strong suitable outer carton size. 3. Fully anti-magnetized packaging. 4. Recommend the best solution of shipment for your reference according to order quantities.
Shipping Time	If in stock, free sample and send out on the same day; Out of stock, delivery time is same with mass production.
Transportation	We support express, air, sea, train, truck etc. and DDP, DDU, CIF, FOB, EXW trade term.
Payment Method	Flexible payment methods include T/T in advance and western union and L/C at sight or others.

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Our Factory

The main magnet factory covers an area of 60000 square meters with well-equipped facilities and has over 500 employees.

FAQ

Q: How long will neodymium magnets last?

A: A permanent magnet if kept and used in optimum working conditions will keep its magnetism for years. It's estimated that neodymium magnets only lose approximately 5% of their magnetism every 100 years.

Q: Do neodymium magnets weaken over time?

A: However, they are still susceptible to some degradation over time. One way that neodymium magnets can lose their strength is through a process called demagnetization, which occurs when the magnet is exposed to high temperatures.

Q: How to make a neodymium magnet stronger?

A: To potentially increase the strength of a neodymium magnet, you can consider stacking multiple magnets together, exposing them to cold temperatures, or using a stronger magnet to remagnetize them.

Q: Do neodymium magnets mess up electronics?

A: Yes, it is a good practice to keep strong magnets, especially neodymium magnets, away from electronics. They can interfere with magnetic sensors, erase data from magnetic storage devices, or damage sensitive components. Even though modern devices have some protection, it's best to err on the side of caution.

Q: Can you Remagnetize a neodymium magnet?

A: Yes, you can remagnetize a neodymium magnet, but it requires a strong magnetic field, often achieved through a specialized magnetizer or by using a very strong electromagnet.

Q: Are thicker neodymium magnets stronger?

A: If two magnets made from Neodymium have the same height dimension eg. 5mm, a wider diameter magnet will always have more magnetic power. Similarly, a thicker magnet with a larger height dimension will contain more volume and more magnetic material than a thinner magnet of the exact same diameter.

We're well-known as one of the leading neodymium magnets manufacturers and suppliers in China for over 30 years. With abundant experience, we warmly welcome you to buy high quality neodymium magnets made in China here from our factory. We also accept customized orders.

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