China Customized NdFeB Square Round Magnets Manufacturers, Suppliers and Factory

Your Professional NdFeB Square Round Magnets Supplier

DongGuan Golds-magnets Technology Co., Ltd. was established in 2012, is a professional manufacturer of NdFeB permanent magnets, high temperature resistant SmCo magnets and customized magnets. The products are widely used in information technology, automotive industry, machinery manufacturing, aerospace, electromechanical systems, medical equipment and other fields. Our goal is to be your truly reliable partner of magnet assembly in China. With professional customization service, competitive price, quality assured products, we are a good choice as your one-stop partner for long-term business.

Why choose us

Strict quality control process
We have our own production plant and adhere to the highest quality control process in the industry to ensure that every link from raw material procurement to product manufacturing is strictly tested and inspected. We are committed to providing customers with neodymium magnet products that meet expectations and requirements.

Testing equipment
Our factory is equipped with a variety of advanced reliability testing equipment, such as salt spray chambers, constant temperature and humidity chambers, high temperature testing machines, magnetic property analyzers, two-dimensional projectors, as well as comprehensive methods such as drop tests and pull tests to meet various product testing requirements.

Our certifications
Dongguan Golds-magnets Technology Co., Ltd has proudly achieved ISO9001 and ISO 14001 certifications, showcasing its dedication to maintaining the highest standards of quality and environmental management.

Cost saving & fast delivery
Owning 3 subsidiaries for raw materials, finish processing and magnets production, we ensure you low cost and short lead time.

Ring Shaped Magnets
Material: Neodymium
Material Grade: (can be customized)
Application: Sensors, Position Detection, Speakers, Permanent Magnet Energy Storage Systems, Magnetic Levitation Trains,...
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Magnate Ring
Material: NdFeB
Material Grade: (can be customized)
Application: Lipstick Tubes, Water Bottles, Dispenser Bottles, Wallets, Home Storage
Specification: Ring shape,...
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Bluetooth Headset Accessories
Material: NdFeB
Material Grade: (can be customized)
Application: Bluetooth Headsets, TWS Headphones, Headset Charging Cases, Headband and Neckband Headphones, Speakers, Headset Case...
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Strong Cylinder Magnets
Material: NdFeB Magnet
Material Grade: (can be customized)
Application: Electric Motors, Generators, Transformers, Headphones, Speakers, Magnetic Fixtures, Sensors, Medical Equipment...
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Spherical Rare Earth Magnets
Material: NdFeB
Material Grade: N50
Application: Electric Motors, Magnetic Suction Cups, Magnetic Levitation Trains
Specification: Spherical shape, uniform magnetic field,...
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Advantages of NdFeB Square Round Magnets

Magnetic energy area
NdFeB square round magnets have extremely high magnetic energy area, which is one of the highest among all commercial magnets.

Stability
NdFeB square round magnet's magnetic properties are stable, not easy to demagnetize, suitable for long-term stable use of the occasion.

Temperature resistance

Although ferrite magnets have better temperature resistance, NdFeB square round magnets can also maintain better magnetic properties at higher temperatures with proper surface treatment.

Shape

NdFeB square round magnets can be made into a variety of shapes and sizes, from simple cylindrical to complex customized shapes to meet the needs of different applications. While ferrite magnets can also be made into a variety of shapes, they are slightly less flexible than NdFeB square round magnets in terms of shape and size.

Corrosion resistance

After appropriate surface treatment, NdFeB square round magnets can have good corrosion resistance, and can operate stably for a long time in harsh environments. And ferrite magnets are not easy to corrode because the main raw material is oxide.

Applications of NdFeB Square Round Magnets

Magnetization
Using a magnetic field to magnetize an object can change the properties and bonding state of the object, change the state of atoms and electrons, and catalyze chemical reactions.

Magnetic separation
Magnetic separation, also known as magnetic separation technology, can extract magnetic substances from non-magnetic substances, and is commonly used in mineral processing, coal, medicine and chemical industry, and water treatment.

Lift the load
Magnetic cranes are very suitable for objects that can be adsorbed such as iron blocks, steel, mechanical parts, etc., such as cranes, which use magnetic force to attract objects.

Audio
The neodymium-iron-boron magnets in our daily audio also play a very important role. The speaker is a device that converts electrical signals and sound signals, and an important part of it is the neodymium-iron-boron magnet.

Microwave communication
NdFeB square round magnets are also of great use in communications. NdFeB square round magnets are required for magnetrons, satellite communications, radar detection, and electronic tracking.

Permanent magnet motor
In the cars we see every day, there are many motors. NdFeB square round magnets are an important part of the motor. Its appearance allows the motor to achieve a technological leap in more energy-saving, smaller size and higher specific power.

Magnetic therapy
In medicine, NdFeB square round magnets are used to develop magnetic therapy equipment for people to treat joint inflammation, hypertension, coronary heart disease and other diseases.

Feature of NdFeB Square Round Magnets

01/

Pull force information
The pull force rating of NdFeB square round magnets is a useful reference point for comparing different magnet strengths. Outside factors such as the placement coatings, rust, surface irregularities, environmental conditions, and the presence of air gaps or other materials between the magnet and the object can lead to a noticeable reduction in performance.

02/

Coating options
This helps protect the magnet from environmental elements that could otherwise compromise its performance over time. While this coating protects the magnets in most normal use cases, repeated or extended exposure to moisture will cause them to rust. For applications that require corrosion resistance, we have both epoxy and plastic-coated magnets available.

03/

Magnetization directions
The vast majority of the disc magnets available for sale are axially magnetized, meaning the magnetic field runs through its thickness, and each pole resides on the disc's flat surfaces. We also have several disc magnets that are diametrically magnetized, meaning that the poles are on the rounded sides of the disc rather than the flat top and bottom.

04/

Sizes & tolerances
Our disc magnets range in size from tiny diameters like 0.10 inch all the way up to large sizes as big as 1.50 inches. The tolerance on all our NdFeB square round magnets is + / - 0.004" unless otherwise noted.

05/

Maximum operating temperature
The maximum operating temperature for NdFeB square round magnets is generally 80°c (176°f). If your application requires that the magnet exceed that temperature, there are high-temperature grades that May work for you. Learn more about the various grades of neodymium material available on the NdFeB square round magnet grades page.

06/

Safety information
It's important to handle NdFeB square round magnets carefully. Magnets are not toys, and should be kept away from children and pets. Small disc magnets can pose a choking hazard, while large powerful magnets can pinch your fingers or cause other injuries.

How We Test the Quality and Performance of NdFeB Square Round Magnets

Dimensional measurements and visual inspection
The visual evaluation of NdFeB square round magnets is an important initial step in determining their quality. Magnets are extensively checked at this step for any evident faults that May impact their performance or structural integrity. Cracks, chips, anomalies in form or surface finish, and inconsistencies in coating or plating are all common faults to check for. Identifying these flaws early in the quality control process ensures that only high-quality magnets are utilized in applications, reducing the chance of failures or malfunctions.

Evaluating magnetic performance using a hysteresis graph
A hysteresis graph, also known as a b-h or magnetization curve, is useful for visualizing and analyzing a NdFeB square round magnet’s magnetic characteristics.

Measurement of pull force and gauss
Pull force tests are critical for determining the magnetic strength of NdFeB square round magnets. By determining the pull force, we May better understand the magnet’s performance in real-world applications such as holding or lifting things.

Salt spray test
The coated or plated magnet is subjected to a controlled saltwater mist. The period of exposure and the appearance of corrosion are then utilized to evaluate the coating or plating’s corrosion resistance.

Humidity test
This test entails exposing the magnet to a high-humidity environment for a prolonged time to evaluate the coating or plating’s resistance to moisture-induced corrosion.

Scratch test
A pen or a sharp item is used to scratch the coated or plated surface to measure abrasion and wear resistance. Under typical scratch pressure, the coating or plating should stay intact and not flake off.

Impact test
An impact force is applied to the magnet to assess the coating’s or plating’s ability to bear mechanical stress without cracking, chipping, or delamination.

Thermal cycling test
The magnet is repeatedly heated and cooled within a certain temperature range during this test. The test reveals how well the magnet preserves its magnetic properties and structural integrity when exposed to frequent temperature variations.

Customization Options of NdFeB Square Round Magnets

Size and dimension customization
The first step in customization is determining the size and dimensions of the magnet. The dimensions should be chosen based on the application's requirements and the space available.

Magnetic grade selection
NdFeB square round magnets come in different grades, each with varying levels of maximum energy product (bhmax). The choice of grade depends on the strength of the magnetic field required for the application. Higher grades are suitable for applications that demand stronger magnetic fields.

Surface treatment
Surface treatments are essential to enhance the magnet's durability and performance. Common surface treatments include:
Nickel plating: Provides a smooth and shiny surface, improves corrosion resistance, and offers a degree of protection against demagnetization.
Zinc plating: Offers excellent corrosion resistance, especially in harsh environments.
Gold plating: Provides a high level of protection against oxidation and corrosion, suitable for applications where long-term stability is crucial.
Epoxy coating: Enhances the magnet's resistance to chipping and cracking, making it suitable for applications involving high impact or vibration.

Magnetic orientation
The orientation of the magnet's magnetic poles can be customized based on the application's needs. This involves aligning the north and south poles in the desired direction to ensure optimal magnetic performance.

Adhesive backing
For applications where the magnet needs to be attached to a surface, adhesive backing can be added. This involves applying a strong, durable adhesive to the magnet's surface, allowing for secure attachment to various materials.

Certificate

FAQ

Q: What is information we need before quotation for NdFeB square magnet?

A: Before our quotation, usually we need the following information. The grade of NdFeB square magnet and size and coating requirement.

Q: How do black epoxy coating and nickel-copper plating differ in terms of corrosion resistance?

A: Both offer good corrosion resistance, but their mechanisms differ. Black epoxy coating relies on a dense oxide film to isolate corrosive agents, while nickel-copper plating utilizes its alloy's chemical stability and passivation film formation.

Q: Does zinc plating affect the NdFeB square round magnet properties of a magnet?

A: Zinc plating itself does not directly impact the NdFeB square round magnet properties of a magnet, as it serves primarily as a corrosion barrier. However, an excessively thick plating may slightly increase the magnet's weight and volume, indirectly affecting its performance in certain applications.

Q: How do I choose the right plating for my magnet?

A: Choosing the right plating for a magnet involves considering factors like the usage environment, aesthetic requirements, budget constraints, and NdFeB square round magnet performance specifications.

Q: How is the strength of a magnet measured?

A: Typically, NdFeB square round magnet strength can be measured in one of two ways. Magnet grades are most useful for permanent NdFeB square round magnet materials, however, pull strength is also available for raw materials.

We're professional ndfeb square round magnets manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to buy customized ndfeb square round magnets at competitive price from our factory.

Spherical Rare Earth Magnets, Bluetooth Headset Accessories, Strong Cylinder Magnets