permanent magnets Archives - Magnets By JOFOV

How Magnets are used in Magneto Stators

by jofovon 4 June 2022in Application Of Magnets, Industrial Magnet, Magnetic Industry, Magnetic News, Magnetic Solution, Magnetic Technology, Motors, Permanent Magnet

How Magnets are used in Magneto Stators

You strap your helmet on, put in the key, and rev the engine of your motorcycle. Once your engine starts and you put it in gear, you are free to ride off into the sunset. But have you ever stopped to wonder how that all works? How is it possible for any engine to run for that matter? Well, part of the answer is magnets. JOFOV Magnetics is a permanent magnets manufacturer, and one of the amazing things about magnets is the diversity of their uses. Today we’d like to talk about magneto stators and the role that permanent magnets play.

What is a Magneto Stator?
A magneto stator is the stationary part of electromagnetic circuits in rotary systems, and it works together with a rotor. It has a laminated core with windings (insulated wires) that coil around it. Magneto stators are commonly used in electric direct current (DC) motors or alternating current (AC) motors, such as the motorcycle engine mentioned above, as well as electric generators, rotors, and even sirens.

How does a Magneto Stator Work?
As the rotary system is in motion and the rotor (the moving part of a rotary system) is moving, DC power is generated by the permanent magnets and the coil of wire in the magneto stator that create a magnetic field, which helps to drive the motor. To put it simply: the magneto stator is stationary, the rotor is rotating, and the magnets are the magic behind the electric currents that are generated. So, when you are revving your motorcycle engine, it is because of the magnetic field created by permanent magnets.

Key Takeaways
Magneto stators have three primary components: the outer frame, the winding (coils), and the core. Magneto stators consist of permanent magnets that are used to create a magnetic field. This magnetic field, when in contact with the rotor, generates DC power and creates an electromagnetic system. It is this electromagnetic system that helps a motor to function. Magnets play a crucial role in the function of a variety of rotary systems, and we hope the next time that you start up your motorcycle you pause for a moment and think about the magic of magnets.

N40 Powerful Neodymium Rectangular Magnet

High Performance Block Industrial Magnets

High Strength Rectangule NdFeB Magnet N42

N42 Strong Square Block Neo Magnet

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Custom Magnetic Solutions for Industry

Thin Plate Sqaure Neodymium Magnets

What are the Uses for Magnetic Actuators?

by jofovon 1 June 2022in Actuators, Application Of Magnets, Industrial Magnet, Magnet Knowledge, Magnetic Industry, Magnetic News, Magnetic Solution, Magnetic Technology, Motors, Permanent Magnet

What are the Uses for Magnetic Actuators?
What is the Purpose of a Magnetic Actuator?
If you’ve read our blog before, then you’ve heard us say it: magnets are everywhere. From speaker equipment to microwave ovens, magnets play a crucial role in our everyday lives. Actuators are responsible for controlling and moving different mechanisms within a machine, and magnetic actuators use magnets in the process. Magnetic actuators are found in a variety of different machines, from the automotive industry to healthcare. Here at JOFOV Magnetics we specialize in permanent magnets and their many uses, and we partner with you from concept to production for all your magnet needs. Let’s take a further look at the role of magnets in actuators.

What is a Magnetic Actuator?
A magnetic actuator, which uses the microelectromechanical systems, is a device that allows for electric currents in machines to be used to move the various components within the machine. Using both a control system and a source of energy they can move and control systems or mechanisms, such as opening a valve.

There are different types of magnetic actuators, including both linear and rotary, and they can have different types of motion, including limited or continuous.

ActuatorWhat Industries Use Magnetic Actuators?
As with most other permanent magnet products, magnetic actuators are used for a variety of different machines, covering a wide range of industries. These devices are most commonly used in the healthcare, industrial, automotive, aerospace, and computer industries. Many of these industries rely heavily on the use of electrical machines and drives that are controlled by magnetic actuators.

What are the Different Types?
The biggest group of magnetic actuators are based on the Lorentz Force Equation and are typically sorted into three different categories: moving magnet, moving coil, and moving iron.

Moving Magnet Actuators
Permanent magnets are placed between two polar magnets, and it can therefore be switched from pole to pole using the coils. These actuators are bi-stable, and while they do present a lot of force they are not as controllable.

Moving Coil Actuators
A mobile coil is placed within a static magnetic field and is driven by a current using the Lorentz Force Equation. The actuators are controllable because the applied current is the same as the force.

Moving Iron Actuators
Soft magnetic parts are placed into a coil system and. The way that they can move is very natural and minimizes the system’s magnetic energy. The reluctant force that is created is larger than the Lorentz Force, but it is only attractive and is not controllable.

N40 Powerful Neodymium Rectangular Magnet

High Performance Block Industrial Magnets

High Strength Rectangule NdFeB Magnet N42

N42 Strong Square Block Neo Magnet

What Is Electro Permanent Magnetic Technology ?

Custom Magnetic Solutions for Industry

Thin Plate Sqaure Neodymium Magnets

Safe and Effective Use of Electromagnetic Equipment

by jofovon 16 November 2021in Electromagnetic Magnets, Electromagnets, Magnet Knowledge, Magnetic Equipment, Magnetic Field, Magnetic Industry, Magnetic Separation, Magnetic Solution, Magnetic Technology, Permanent Magnet, Separator Magnets

Safe and Effective Use of Electromagnetic Equipment

The usefulness of electromagnetic equipment cannot be denied. Employed in everything from massive construction cranes to the doorbell in your house, electromagnets use a simple on/off function to perform complex tasks every day.

In the process of magnetic separation, electromagnets or permanent magnets are used to extract sources of potential contamination before it can damage machinery. In this capacity, electromagnets can help provide a boost to manufacturing efficiency. There are some things you should consider when choosing between the use of an electromagnet or a permanent magnet.

Need for a Constant Power Supply
One of the key advantages of using an electromagnet is the ability to adjust the magnetic force by adjusting the power, and the ability turn it on and off as required. But with that flexibility comes the need for a consistent, reliable source of power. It will also have some impact on operating costs, and electricity rates are not fixed. This power need doesn’t mean that an electromagnetic solution isn’t the right one for your business, but it is something to keep in mind.

Increased Equipment Weight
A suspended electromagnet is usually heavier than a permanent magnet. This trade-off is acceptable because of the deeper magnetic fields it can provide, but if you are incorporating new magnetic separation equipment in an old facility, the structural supports required for heavier equipment will be a factor in your ultimate purchasing decision. If in doubt, a magnetic separation specialist can assist in the work with a structural engineer to ensure that the equipment you choose can be safely implemented at your facility.

Ongoing Maintenance Requirements
When a piece of equipment has moving parts, it will automatically require more TLC throughout its lifespan than a piece with stationary elements. Oil conditions must be monitored for signs of degradation, and the equipment must be checked periodically for signs of coil wear. Again, these ongoing maintenance requirements do not mean that electromagnetic equipment isn’t the right choice for your company, it is simply a consideration to bear in mind when making your choice.

When deciding on the right equipment for your business, an essential step will be to contact a trained magnetic separation specialist. The time you spend on a thorough consultation and system design at the outset will benefit your business for years to come. Contact us today so we can assess your business needs and devise a magnetic separation system that is custom-designed for your company’s unique requirements.

NdFeB Grade N42 Flat Round Magnets

N52 Neodymium Round Magnets

Super Strong NdFeB Rectangular Magnets N45

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Zinc Plated NdFeB Sensor Magnet 5mmx1mm

N54 High Performance NdFeB Magnet for Motors

The Wonderful World of Magnetic Products

by jofovon 21 October 2021in AlNiCo Magnets, Bonded Magnets, Ferrite Magnets, Flexible Magnets, Holding Magnets, Industrial Magnet, Magnet Knowledge, Magnetic Lifter, Magnetic Products, Magnetic Solution, Magnetic System, Neodymium Magnets, Permanent Magnet, Rubber Magnets, Separator Magnets, SmCo Magnets

The Wonderful World of Magnetic Products

Permanent magnets
Custom-made magnets for your specific application: Permanent magnets made of hard ferrite, AlNiCo, samarium-cobalt, neodymium-iron-boron as well as plastic-bonded magnets of varying magnetic qualities.

Holding magnets
The ideal handling tool when it comes to the adhesion, tensioning and fixation of work pieces: Flat holding magnets, bar holding magnets, organizer magnets, decorative magnets, rubber coated magnet systems.

Material handling systems
Magnetic sheet separators, magnetic wheels, manual destackers and holding magnets are proven tools for the secure and efficient handling of materials in the metalworking industry.

Filter magnets
Single or multiple magnets. Magnetic filter bars are ideal for removing metal contaminations from liquid, granular or atomized product streams.

Lifting magnets
Permanent-magnetic lifting magnets are used to transport ferromagnetic loads and materials quickly and with maximum safety.

Magnetic tapes and magnetic foils
Magnetic tapes and magnetic foils are ideal for many industrial areas, both for labeling shelves, cabinets, and drawers as well as for presentation and planning tasks.

Measuring devices
Compact and practical tools that display the polarity, magnetization types and magnet fields, and measure the magnetic flux density and stray magnetic fields.

Whiteboards
High-quality whiteboards with a magnetic and writable surface for presentation and planning in private or professional environments. Equipped with frame and pen tray made of aluminum. Various sizes.

Popular Categories
With over 1000 magnets and magnetic products to choose from, you are sure to find the magnets suitable for your application! Browse our popular categories or contact us and our friendly staff would be happy to help with any questions you may have.

Rare Earth (Neodymium)

Magnetic Strips

Rare Earth Holding Pots

Home & Office Magnets

Magnetic Tools & Equipment

We have a variety of magnets and magnetic products in stock, ranging from small magnets for the home and office, to industrial and heavy-duty magnets, to be used mostly in warehouses and manufacturing environments. The magnets that are most applicable for industrial purposes are the Neodymium Rare Earth Magnets as these are the strongest magnets commercially available.

JOFOV Magnetics is Australia’s leading supplier of magnets, magnetic products, equipment and tools. We offer over 1000 different sizes and grades of Neodymium Magnets (Rare Earth Magnets), Ceramic Magnets, Magnetic Labels, Magnetic Strips, Samarium Cobalt, Alnico, and Magnetic Sheets. JOFOV Magnetics supplies all Australia, including Sydney, Melbourne, Brisbane, Perth, Adelaide, and Hobart. Our strong magnets are suitable for multiple purposes, servicing customers in the aerospace, manufacturing, mining, automotive, engineering, electronics, craft, therapeutic, signage, display, shop-fitting and printing industries.

A Brief Development History Of Magnet Materials

We Develop the Magnetic Solution

NiCuNi Coated Tile N52 High Performance NdFeB Magnet

Nickel Coated N48 Rare Earth Arc Magnets

Machining Metal Shell Eyelet Style Magnetic Hook Neodymium D34mm

NeoPad-2 Vehicle Roof Sign Magnet

Magnet Materials

Cylindrical Hole NdFeB Cup Magnet D38mm

What Kinds of Permanent Magnets

by jofovon 20 October 2021in AlNiCo Magnets, Bonded Magnets, Ferrite Magnets, Industrial Magnet, Magnet Knowledge, Magnetic Industry, Magnetic Materials, Neodymium Magnets, Permanent Magnet, Rare Earth Magnets, Rubber Magnets, SmCo Magnets

What Kinds of Permanent Magnets

Permanent magnets have become indispensable in today’s technology-focused world. The many different magnetic materials and their manifold characteristics have firmly established permanent magnets as important elements in countless application fields. In addition to the proven materials ferrite and AlNiCo, modern magnets are also made from rare earth materials such as neodymium-iron-boron and samarium-cobalt. Even small magnets made from these materials offer strong magnetic force and thereby cater to the growing demand for smaller and stronger magnets.
Permanent magnets also play a key role in the growing field of automation technology, where it is essential to continue the development of drives, actuators and sensors. A particular leap in the direction of future technologies was the discovery of the new materials samarium-cobalt and neodymium-iron-boron. Some of the particularly suitable applications are products that can only function with permanent magnets, including e-bikes, electric drives in the automotive sector and hybrid cars. The generation of green energy from wind and hydropower as well as other types of modern generators also depends on the use of permanent magnets.
Another important area that uses permanent magnets is sensor technology. Permanent magnets are in demand wherever measurements must be transmitted indirectly. Under difficult environmental conditions (dust, temperature, humidity etc.), they are frequently the only possible way of recording measurement data.

What Kinds of Permanent Magnets

Hard ferrite magnets

Hard ferrites are the least expensive and globally most commonly available of all magnetic materials. They are ceramic materials, and thus very hard and brittle.
Compared to other metallic materials, the magnetic properties of hard ferrite permanent magnets are fairly weak. Their benefits include lower costs as well as a higher resistance against corrosion and chemicals. They are also easy to magnetize and suitable for many different applications.

AlNiCo magnets

Permanent magnets made from AlNiCo are frequently used in applications that require a resistance to high temperatures of up to 500 °C (930 °F). They are metallic permanent magnets on the basis of an aluminum-nickel-cobalt alloy. Additional metals such as iron, copper or titanium are sometimes added to the alloy.
The great magnetic stability when exposed to temperatures, the temperature coefficient and a high remanence make this easily magnetizable material an interesting option for different applications.
However, one has to take into account that the low coercive field strength of AlNiCo magnets makes them easily demagnetizable.

Samarium-cobalt magnets

SmCo magnets consist of samarium (Sm) and cobalt (Co). With respect to the two possible alloy compositions, a distinction is made between Sm1Co5 and Sm2Co17, also referred to as 1/5 alloy and 2/17 alloy. These materials are part of the group of rare earth materials, and permanent magnets made from them offer a high temperature stability and corrosion resistance, a low temperature coefficient and a very high coercive field strength.
This makes samarium-cobalt (SmCo) an extremely versatile but expensive all-round material. Magnets made from samarium-cobalt alloys are used in applications that require very strong magnetic fields in extreme temperatures.

Neodymium-iron-boron magnets

Neodymium-iron-boron (NdFeB) is a material that is composed of the rare earth metal neodymium (Nd), iron (Fe) and boron (B). Magnets made from neodymium-iron-boron are often just called neodymium magnets; they boast the highest energy density of all magnetic materials and are used in applications that require extreme forces in the smallest possible space.
Permanent magnets made from neodymium can often be worked to conform with the desired geometry, which allows for the production of small quantities at reasonable prices.
When used in open spaces, it is recommended to apply metallic or non-metallic coatings to the NdFeB magnets in order to prevent corrosion and use them at higher temperatures of up to 200 °C (392 °F).

Plastic-bonded hard ferrite magnets

Plastic-bonded hard ferrite magnets are composite materials that consist of permanent magnetic powder made from hard ferrite and embedded in thermoplastic materials. Using injection molding, this material can be used to inexpensively produce complex or filigree shapes with different magnetic and mechanic properties. It is also possible to integrate axles, shafts and bearing bushes. Another advantage of plastic-bonded magnets is their high resistance against corrosion and breakage, although, of course, the magnetic performance of sintered magnets without plastic additives cannot be matched by plastic-bonded magnets.

Plastic-bonded neodymium-iron-boron magnets

Plastic-bonded neodymium-iron-boron magnets (NdFeB-p) are composite materials that consist of permanent magnetic powder made from NdFeB and embedded in plastic materials. Depending on the manufacturing technique, they can be either injection molded or pressed plastic-bonded magnets.

Compared to sintered NdFeB magnets, these plastic-bonded permanent magnets are particularly suitable for high-precision parts. It is also possible to integrate axles, shafts and bearing bushes.

Injection molding can be used to inexpensively produce complex or filigree shapes with different magnetic and mechanic properties. Another advantage of plastic-bonded magnets is their high resistance against corrosion and breakage. The highest magnetic performance within the product group of bonded magnets can be achieved by performing the injection within the magnetic field. However, due to the low fill quantity of magnetic powder, the performance of plastic-bonded neodymium-iron-boron magnets is still significantly lower than the performance of sintered magnets.

Neodymium Flat Pot Magnets with Threaded Neck Ø60x15mm

Ø50.8mm 2inch Dia Threaded Bushing Neodymium Pot Magnet

Neodymium Mounting Magnet Pot with Through Hole D25mm

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Customized Tile Shape Magnet Nickel N35AH

Nickel Coated N48 Rare Earth Arc Magnets

Neodymium Arc Magnets N38 Nickel Plating

What Is A Permanent Magnet

by jofovon 15 October 2021in AlNiCo Magnets, Bonded Magnets, Industrial Magnet, Magnet Knowledge, Magnetic Industry, Magnetic Materials, Neodymium Magnets, Permanent Magnet, Rare Earth Magnets, Rubber Magnets, SmCo Magnets

What Is A Permanent Magnet

A permanent magnet, namely a permanent magnet, can be a natural product, also known as a natural magnet, or manufactured artificially (the strongest magnet is a neodymium iron boron magnet). It has a wide hysteresis loop and high coercivity. High remanence, once magnetized, can maintain a constant magnetic material. Also known as permanent magnetic materials, hard magnetic materials. In application, the permanent magnet works in the demagnetization part of the second quadrant of the magnetic Ray loop after deep magnetic saturation and magnetization. The permanent magnet should have the highest possible coercive force Hc, remanence Br and maximum magnetic energy product (BH) m to ensure the storage of maximum magnetic energy and stable magnetism.

Permanent magnet classification
Classified by material
(1) Alloy permanent magnet materials

Including rare earth permanent magnet materials (neodymium iron boron Nd2Fe14B), samarium cobalt (SmCo), aluminium nickel cobalt (AlNiCo)

(2) Ferrite permanent magnet material (Ferrite)

Classified by the production process
The different production processes are divided into sintered ferrite, bonded ferrite, and injection-molded ferrite. These three processes are divided into isotropic and anisotropic magnets according to the orientation of the magnetic crystal.

The above are the main permanent magnet materials currently on the market, and some are eliminated due to production process or cost reasons, which cannot be used in a wide range, such as Cu-Ni-Fe (copper nickel-iron), Fe-Co-Mo (iron, cobalt, molybdenum)), Fe-Co-V (iron cobalt vanadium), MnBi (manganese bismuth)

Mainstream permanent magnet
Rare earth permanent magnet materials

Rare earth permanent magnet materials (NdFeB Nd2Fe14B) are divided into the following three types according to different production processes:

(1) Bonded NdFeB Magnet

Bonded NdFeB is a composite NdFeB permanent magnet made by uniformly mixing NdFeB powder with a binder such as resin, plastic, or low melting point metal and then using compression extrusion or injection molding methods. The product is formed once, without secondary processing, and can be directly made into various complex shapes. Bonded NdFeB has magnetism in all directions and can be processed into NdFeB compression molds and injection molds. High precision, excellent magnetic properties, good corrosion resistance, and good temperature stability.

(2) Sintered NdFeB Magnet

Sintered neodymium iron boron permanent magnets are smelted after airflow milling. They have a high coercivity and extremely high magnetic properties. Its maximum magnetic energy product (BHmax) is more than 10 times higher than that of ferrite. . Its mechanical properties are also quite good, and it can cut and process different shapes and drill holes. The maximum working temperature of high-performance products can reach 200℃.

Because of its material content, it is easy to cause rust, so the surface must be treated with different coatings according to different requirements. (Such as zinc plating, nickel, environmental zinc, environmental nickel, copper-nickel, copper-nickel, etc.). Very hard and brittle, with high resistance to demagnetization, high cost/performance ratio, not suitable for high working temperature (>200℃).

(3) Injection molded neodymium iron boron (Zhusu NdFeB)

Injection molded neodymium iron boron (Zhusu NdFeB)It has extremely high accuracy and is easy to make thin-walled rings or thin magnets with complex anisotropic shapes.

What Is A Permanent Magnet

Sintered Ferrite
The main raw materials of sintered ferrite include BaFe12019 and SrFe12019, which are divided into isotropic and anisotropic magnets according to the orientation of the magnetic crystals.

Because of its low price and moderate magnetic properties, it has become a widely used magnet at present. Ferrite magnets are manufactured by ceramic technology, and the texture is relatively hard, and it is also a brittle material. Because of their good temperature resistance and low price, ferrite magnets have become more widely used permanent magnets.

Rubber Magnet

Rubber Magnet (Rubber Magnet) is a kind of ferrite magnetic material series. It is made of bonded ferrite powder and synthetic rubber through extrusion molding, calendering, injection molding, and other processes. It has flexibility, is Flexible, and a twistable magnet. It can be processed into strips, rolls, flakes, and various complex shapes. Rubber magnets are made of magnetic powder (SrO6Fe2O3), polyethylene (CPE), and other additives (EBSO, DOP), etc., and are manufactured by extrusion and calendering.

The rubber magnetic material can be of the same sex or the opposite sex. It is made of ferrite magnetic powder, CPE, and some trace elements and can be bent, twisted, and rolled. It can be used without more mechanical processing, and the shape can be trimmed according to the required size. According to customer requirements, the rubber magnet can also be compounded with PVC, back glue, UV oil, etc. Its magnetic energy product is between 0.60 and 1.50 MGOe. Application areas of rubber magnetic materials: refrigerators, information signage racks, fasteners for fixing objects to metal bodies for advertisements, etc., magnetic sheets for toys, teaching instruments, switches, and sensors. Mainly used in micro-motors, refrigerators, disinfection cabinets, kitchen cabinets, toys, stationery, advertising, and other industries.

AlNiCo
Aluminium Nickel Cobalt (AlNiCo) is the first permanent magnet material developed. It is an alloy composed of aluminium, nickel, cobalt, iron, and other trace metal elements. Different production processes divide it into sintered aluminium nickel cobalt (Sintered AlNiCo) and cast aluminium nickel cobalt (Cast AlNiCo).

Alnico permanent magnet products are widely used in various instruments and other applications. The product shapes are mostly round and square. The casting process can be processed into different sizes and shapes; compared with the casting process, sintered products are limited to small sizes, and the produced blanks have better dimensional tolerances than cast products, and their magnetic properties are slightly lower than that of cast products, but they can Workability is better. Cast AlNiCo permanent magnets have the lowest reversible temperature coefficient among the permanent magnet materials, and the working temperature can be as high as 600℃.

Samarium Cobalt

The samarium cobalt (SmCo) composition is divided into SmCo5 and Sm2Co17, the first and second-generation rare earth permanent magnet materials. Because its raw materials are very scarce and expensive, its development is restricted. Samarium cobalt (SmCo), as the second-generation rare earth permanent magnet, not only has a high magnetic energy product (14-28MGOe) and reliable coercivity and exhibits good temperature characteristics in the rare earth permanent magnet series. Compared with NdFeB, samarium cobalt is more suitable for working in a high-temperature environment (>200℃).

Permanent magnets are widely used in various fields such as electronics, electrical, machinery, transportation, medical and daily necessities. Such as the permanent magnet of the speaker and telephone receiver; the magnetic system of the magnetoelectric meter; the magnetic pole of the generator and the permanent magnet motor; the permanent magnet device used in the machine manufacturing industry (such as the permanent magnet chuck of the surface grinder, etc.), the magnetic suspension system, and the magnetic bearing; Magnetic separation system, magnetic separation system, magnetic purification water system, magnetron, the magnetic system of a proton accelerator, etc.

Neodymium Flat Pot Magnets with Threaded Neck Ø60x15mm

Ø50.8mm 2inch Dia Threaded Bushing Neodymium Pot Magnet

Neodymium Mounting Magnet Pot with Through Hole D25mm

Affordable Neo Permanent Arc Motor Magnets

Customized Tile Shape Magnet Nickel N35AH

Nickel Coated N48 Rare Earth Arc Magnets

Neodymium Arc Magnets N38 Nickel Plating

History of Permanent Magnets

by jofovon 10 October 2021in AlNiCo Magnets, Magnet Knowledge, Magnetic Materials, Neodymium Magnets, Permanent Magnet, Rare Earth Magnets, SmCo Magnets

History of Permanent Magnets

Lodestones
The history of permanent magnets goes back to ancient times. Records from early Greek, Roman and Chinese civilisations make reference to rare and mysterious stones called lodestones. These lodestones could attract each other and also small pieces of iron. When suspended from a thread it was noted that they always pointed in the same direction. We now know that lodestones contain magnetite, an oxide of iron and that they are a naturally occurring magnet Although lodestones were considered an intriguing phenomenon by scientists of the day, they were not really utilised in any constructive way until around 1200 AD with the introduction of the mariner’s (magnetic) compass. The mariner’s compass is a device housing a pivoting magnetised needle, which freely and consistently points towards magnetic north. This enables travellers to consistently and safely navigate their way from one place to another. Modern research into magnetism is heading in many different directions involving a vast array of materials, however, at this time there are only four types of magnets that are commonly used throughout the world. They are Alnico, Ferrite, Samarium Cobalt and the most recently invented, Neodymium or “Rare Earth magnets”.

History of Permanent Magnets

Alnico Magnets
Alnico magnets came onto the scene in the 1940’s and they started a revolution in the use of permanent magnets. For the first time, it was now possible to replace electromagnets with permanent (Alnico) magnets. This provided a design flexibility that had previously been unthinkable. The Discovery of these magnets allowed Alnico magnets to replace electromagnets in devices such as generators, electric motors and microphones which was a major technological advancement Alnico magnets are made from Aluminium, Nickel and Cobalt. They have an excellent temperature tolerance of up to 550ﾰC and are relatively corrosion resistant. Alnico’s biggest downfall is its poor resistance to demagnetisation. This instability sometimes makes Alnico unsuitable for certain demanding engineering requirements. Although they are still widely used today, Alnico Magnets are gradually becoming priced out of the market with the availability of newer, high tech and lower priced magnets that are now commonplace.

Ferrite Magnets
In the early to mid-1950’s came the creation of Ferrite magnets. Often referred to as ceramic magnets, Ferrites quickly became the preferred choice over Alnico due to their low cost and their strong resistance to demagnetisation. The availability of Ferrite magnets rapidly increased the momentum in the abundance of inventions and improvements to existing products using magnets. Ferrite magnets are used in all manner of products including electronic sensing devices, electric motors, lifting devices and magnetic separators Ferrite magnets are low cost and they have excellent corrosion resistance. They are very hard and as such, they are very brittle. This also makes them difficult to machine or drill holes. They have a very good temperature tolerance with relative magnetic stability at temperatures of up to 250°C.

Samarium Colbalt Magnets
1970 saw the entrance of Samarium Cobalt magnets into the marketplace. In a similar way that Ferrite and Alnico magnets had done before, Samarium Cobalt magnets brought a whole range of new characteristics, applications and possibilities to the industry. Samarium Cobalt magnets have several features that made them far superior to any magnet available during the time. They have a magnetic strength that is several times greater than either Alnico or Ferrite magnets, while at the same time they offer a very high-temperature stability. Temperatures of 300ﾰ C can be easily withstood by Samarium Cobalt magnets and in addition to this, they also demonstrate excellent corrosion resistance. However, samarium cobalt does have its disadvantages two of which are that they are very brittle and therefore extremely fragile and they are a very expensive magnet to produce. Samarium Cobalt magnets properties make them a perfect choice for high strength and high-temperature applications such as stepper motors and furnace sensors etc. Their corrosion resistance opens up numerous opportunities in marine environments and also in chemical industries.

Neodymium (Rare Earth) Magnets
1983 saw the discovery of Neodymium Iron Boron Magnets. The invention of this new magnet was announced almost simultaneously by two separate companies, (General Motors and Sumitomo Special Metals) who were working independently of each other on very different production methods of a very similar product. This announcement created a huge amount of interest as magnet technology had now taken another leap forward to produce an entirely new magnetic material. Neodymium Iron Boron Magnets, or “Rare Earth” magnets as they are more commonly known, are the strongest type of magnet available on today’s market. Their manufacturing process is also considerably cheaper making Neodymium’s a very cost effective. Unfortunately, Rare Earth magnets do have two disadvantages. They have poor corrosion resistance and they are more temperature sensitive than other magnets. However new high-temperature tolerant grades of Rare Earth magnets are being created and released on a regular basis. Rare Earth magnets offer high magnetic energy and good stability making them the logical choice for many electronics and engineering projects. Rare Earth magnets are used in all manner of ways in almost every sector of the magnetics industry such as mining, health, construction, electronics, education and the food industry. They have become the industry standard when size, strength and efficiency are required.

N38 Grade Nd Arc Segment Magnets

N35SH Motor NdFeB Segment Magnets

Magnetic Filter Separator Bars

N42SH ARC Neodymium Magnet

Rare Earth Neodymium Motor Magnets N42UH

NiCuNi Coated Tile N52 High Performance NdFeB Magnet

A Brief Development History Of Magnet Materials

by jofovon 20 September 2021in AlNiCo Magnets, Magnet Knowledge, Magnetic Materials, Neodymium Magnets, Permanent Magnet, Rare Earth Magnets, SmCo Magnets

A Brief Development History Of Magnet Materials

Magnetic materials are ancient and very versatile functional materials. The magnetic properties of substances were recognized and applied as early as 3000 years ago, for example, natural magnets were used as compasses in ancient China. In recent times, with the development of industry and technology, a large number of new magnetic materials have been discovered, which are roughly divided into three generations according to their main applications: the first generation of AlNiCo, the second generation of ferrite, and the third generation of rare earth permanent magnets. The following is a brief history of the development of magnetic materials.

A Brief Development History Of Magnet Materials

1st century B.C. Sima Qian’s “The Records of the Grand Historian” describes that the Yellow Emperor used a compass in battle.

In 1086, Shen Kuo’s book of “Mengxi Pen-talk” of the Song Dynasty recorded the manufacturing method of the compass, etc.

Song Dynasty Compass -magnetic application

1119 The compass was used for navigation as recorded in Zhu or Pingzhou Kezhuan of the Song Dynasty.

1600 William Gibert of England, the earliest work “De Magnete Magnet”.

1820 H.C. Oersted, Denmark, first discovered that electric currents could produce magnetic fields.

1822 Lussac, France, invented the electromagnet, i.e. an electric current passing through a wound wire could magnetize an intermediate iron.

1826 France’s Ampere discovered Abe’s law, the right-hand spiral rule.

1831 Faraday demonstrated the phenomenon of electromagnetic induction and revealed the relationship between electromagnetism.

1832 A.H. Pixey, France, invented the permanent magnet rotating alternator made of natural magnets.

19th century to 20th century New types of DC and AC motors/generators were inundated in Europe.

1931 Japanese Tokushichi Mishima invented AlNiCo AlNiCo magnets. before the discovery of rare earth magnets in the 1970s, AlNiCo alloys were the strongest permanent magnet material. (First generation magnetic material)

1933 Japanese Kato and Takei discovered Fe2O3, a ferrite containing Co. By weight, ferrite is still the most widely used magnetic material in the world today. (Second generation magnetic material)

1935 Snoek of Holland invented soft magnetic ferrite

1965 Mader and Nowick prepared CoP ferromagnetic amorphous alloy

1967 Discovery of 1:5 SmCo by Strnat, USA, marking the era of rare earth permanent magnets (third generation magnetic materials)

1977 Ojima, Japan discovered 2:17 type SmCo with small amounts of Cu and Zr.

1983 Japan Sagawa discovered Nd2Fe14B, NdFeB was called the king of contemporary magnetism.

1983 NdFe14B was discovered by General Motors of USA and Japan, and each of them had a patent.

1984 NdFeB with magnetic energy product over 35MGOe was developed by China Iron and Steel Research Institute.

In 1992, some domestic companies bought the patent of Nd-Fe-B from Sumitomo in Japan.

In 2002, the annual output of Nd-Fe-B in China reached 8,000 tons, surpassing Japan to become the first in the world.

In 2008, the annual output of Nd-Fe-B reached 46,000 tons with more than 100 Nd-Fe-B manufacturers in China.

In 2011, the price of rare earth skyrocketed, and the downstream customers were affected, so the replacement and reduction of dysprosium became the trend. At the same time, the lobbying capital was flooded in the rare earth industry, causing a serious overcapacity in the whole industry chain, including NdFeB.

In 2013, the industry predicts that the domestic NdFeB production capacity has reached 335,000 tons, multiplied by 0.8 factor about 270,000 tons, while the actual annual demand is only 110,000 tons, so the production capacity is seriously overcapacity, especially the middle and low-end products.

In 2014, except for Hitachi Metals, Shin-Etsu Chemical, TDK and VAC in Germany, and a small amount of production by Molybdenum in USA, all other NdFeB factories are in China, and the annual output of NdFeB in China is more than 80% of the world, but the output value only accounts for more than half.

From the above development history, we can find some interesting phenomena.

First, China was the first to pay attention to magnetic materials, and the application of compass changed the world’s maritime history. But there was a gap in the middle, and finally, by the reform and opening up, it became the biggest manufacturing base of magnetic materials in the world. However, the grade of Chinese NdFeB products is quite low, and the gap between the added value and Japanese enterprises is large.

Secondly, in the 19th century, Europe developed science and technology, and the pioneering theories and practices of modern electromagnetism, engines and generators were initiated by Europeans.

Third, since the 1930s, the locomotive of the world’s magnetic material research and development has changed to Japan and the United States. Especially, Japan has been the world leader in magnetic material R&D before the war, so we have to admire the achievement of Japanese in the field of material science, which is worthy of Chinese people to learn.

Since the birth of Nd-Fe-B in laboratory, it has been more than 30 years. Due to the expensive price of rare earths, especially due to the lack of heavy rare earths of dysprosium and terbium, countries all over the world are competing to develop new generation of magnetic materials, such as samarium-iron-nitrogen permanent magnets, nano-composite rare earth permanent magnets, etc. However, the effect is still unsatisfactory, and the position of Nd-Fe-B is still unshakable in the next one or two decades. We will wait and see how the magnetic materials will develop in the future.

N45 Servo Motor Permanent Arc Magnet

Super Strong Segment NdFeB Magnets N50

Neodymium-Iron-Boron Magnets Arc N42

NiCuNi Coated Tile N52 High Performance NdFeB Magnet

History of Permanent Magnets

N42SH ARC Neodymium Magnet

Φ48mm Threaded Stud Pot Magnet Flat Round Base NdFeB

We Develop the Magnetic Solution

by jofovon 10 September 2021in Application Of Magnets, Magnetic Industry, Magnetic News, Magnetic Solution, Magnetic System, Magnetic Technology, Permanent Magnet

We Develop the Magnetic Solution by JOFOV (ShengDengShi) Magnetics

Magnets move us. From the very beginning.
You have a fresh idea and are looking for the right technical solution?

Magnetic force can set inventions in motion that make life easier. In a sleeping aid our magnets rock the pram and the baby gently and quietly to sleep.

What do you want to move? We can rock the baby together.

First, we listen. Then we develop the solution.
We will guide you through the wonderful world of magnets, their infinite variations, shapes and possibilities. Tell us about your task and we will find the key – regardless of whether it’s an AlNiCo magnet, plastic-bonded hard ferrite or a rare earth compound, standard article or complex magnet system.

We Develop the Magnetic Solution

We send out 300,000 magnets from Essen daily.
Some of them we send to the desert.
200 of our best permanent magnets drive the highly efficient wheel hub motors of the sleek JOFOV blue.cruiser on its way to the future. At the world championship for solar cars, our magnets leave the China heat and penetrating dust cold.

Our magnets make life easier.
And sometimes have to carry a heavy load.
Our products are everywhere, in the bathroom as well as in the cargo port. When they lift, hold and position things for us, they do so reliably and safely. Without drilling, without screws – solely with magnetic force. And in record time.

We dive deep into the topic of magnetic technology.
That’s when we really hit the heights.
Our specialists are heroes of magnetic power: The 200-meter cable of the high-speed elevators in the One World Trade Center was twisting and turning over and over again until our experts installed a reliable guidance system made of neodymium-iron-boron magnets – they guide the 400-kilogram cable in the elevator shaft as safely as if it were on rails.

What Kinds of Permanent Magnets

Rare Earth Neodymium Motor Magnets N42UH

Neodymium Arc Magnets N38 Nickel Plating

N35SH Motor NdFeB Segment Magnets

History of Permanent Magnets

What Is A Permanent Magnet

What is a Permanent Magnetic Lifter ?

by jofovon 10 June 2021in Industrial Magnet, Magnet Knowledge, Magnetic Lifter, Magnetic Materials, Magnetic System, Neodymium Magnets, Permanent Magnet

What is a Permanent Magnetic Lifter ?

Permanent magnetic lifter also named Manual lifting permanent magnet. Magnetic lifter is a tool that uses the principle of magnetic circuit to carry iron materials. The permanent magnetic lifter is provided with a switch, which controls whether the working pole surface at the bottom of the permanent magnetic lifter is magnetic to iron materials. Then control the handling and unloading of iron workpieces. The use of permanent magnetic lifters avoids the time of binding materials, saves labor costs, and realizes fast handling. Especially for large workpieces, only one operator can easily move them. Unlike binding and slings, magnetic lifters can handle finished parts without leaving any scratches.

Permanent magnet lifters mainly used to lift steel plates and round steel, and flat mechanical parts. Because the permanent magnet lift is light in weight, easy to operate and powerful in suction, the magnetic lifter is widely used in shipbuilding, storage, transportation, machinery manufacturing, etc. Permanent magnet lifters are widely used as lifting tools in factory docks, shipyards, processing centers and warehouses.

What is a Permanent Magnetic Lifter

How to use a permanent magnetic lifter？

Place the permanent magnetic lifter on the material to be transported, move the handle to the “on” position, the permanent magnetic lifter will be firmly adsorbed on the material. The upper part of the magnetic lifter has a rotatable ring, which can be used to lift, hook the hook of the crane, etc. for carrying.

The permanent magnetic lifter has a strong magnetic circuit generated by a NdFeB magnet that provides permanent power. Turn the manual handle to control the opening and closing of the magnetic circuit. When the handle is not in use, it is parked in the “non-magnetic area”. When it is needed, place the magnetic lifter on the material to be transported, and then press the button behind the handle while turning the handle to the other side of the “magnetic area” (similar to Manually gear the car’s handbrake). If there is no material as an attracting object, turning the handle completely depends on human power, which will be very laborious at this time. The permanent magnet lifter is permanently effective under normal temperature conditions and does not require electricity. Why is this happening? You will know after understanding the structure and principle of the permanent magnetic lifter.

The structure and principle of permanent magnetic lifter

The permanent magnetic lifter is made of high-performance neodymium iron boron permanent magnet materials to form a strong magnetic system inside the magnetic lifter. This is the key to attracting and transporting iron materials. The permanent magnet system is connected to the external handle, and the direction of the magnetic pole of the magnetic core is changed by turning the handle to the left and right, which affects the strength of the magnetic field of the magnetic system to hold and release.

The upper part of the permanent magnetic lifter has a hoisting ring for lifting the workpiece, and the bottom part has a V-shaped groove for sucking and holding the corresponding cylindrical object. Among them, after the handle is turned to the working state, it will be jammed by the safety bolt to prevent the handle from turning to the unloading state during the hoisting process to cause the workpiece to fall off, thereby ensuring production safety.

The magnetic field of the super permanent magnet connected to the handle will form a superimposed combined magnetic field with the permanent magnet inside the permanent magnet lifter. The position of the super permanent magnet connected to the handle is different, and the superposition effect is also different. When the permanent magnetic lifter is in the closed state, the direction of the magnetic field lines of the super permanent magnet connected to the handle and the permanent magnet inside the permanent magnet lifter is the same, and the magnetic field line is less than the working pole face of the permanent magnet lifter. The internal composition of a closed loop of the magnetic circuit. The strength of the magnetic field is weak, and there is no magnetic field line coming out from the working pole surface of the permanent magnet jack, so there is no attraction to the object. At this point, it can be uninstalled smoothly.

ON position of Magnetic Lifter

When the handle is turned to the “ON” position, the magnetic field direction of the permanent magnet connected to the handle turns to the state opposite to the “OFF” position. At this time, the two opposite magnetic fields are superimposed. Since the lines of magnetic induction cannot cross each other, squeezing causes the magnetic field strength to increase. In other words, the reverse magnetic field produces a stronger magnetic field instead. The magnetic field lines come out from the N pole of the magnet, pass through the yoke, pass through the ferromagnetic workpiece, and then return to the yoke to enter the S pole of the magnet,

OFF position of Magnetic Lifter

Permanent magnetic lifter size

The size of the permanent magnetic lifter varies greatly. The length of the small magnetic lifter can be less than 10cm, and it is also very convenient to carry. The maximum pulling force can reach 350kg. The super large can reach 0.8m, and the maximum tensile value can reach 18000kg. Multiple magnetic lifters can be used in combination to meet all your needs.

3 times the safety factor, safe and reliable. The 3 times safety factor means that the total weight required to pull the accessory away from the permanent magnetic lifter is usually 3 times the rated pulling force. For example: if the rated weight of the permanent magnetic lifter is 100kg, the maximum pulling force is 300kg. When the magnetic lifter has carried an iron plate weighing 100kg, if an object exceeding 200kg is added to the iron plate or a force exceeding 1960N is applied, the iron plate will fall off the magnetic lifter.

Because high-temperature permanent magnets will produce demagnetization, the permanent magnetic lifter will weaken and the pulling force value will decrease. Therefore, it is recommended that the temperature not exceed 80°C.

Permanent Magnetic Lifter Dimension

Model	L（mm）	W(mm）	H（mm）	R（mm）	Weight（mm）	Lifting capacity（kg）	Max Pull-off force(kg)
SDPML-100	94	62	72	160	3	100	350
SDPML-300	163	92	95	205	9	300	900
SDPML-600	208	114	115	220	19	600	1800
SDPML-1000	265	134	140	250	34	1000	3000
SDPML-2000	442	154	166	360	82	2000	6000
SDPML-3000	532	170	192	490	120	3000	9000
SDPML-5000	612	233	286	720	290	5000	15000
SDPML-6000	808	233	286	920	385	6000	18000

The magnetic elevator has the smallest external dimensions and is very compact. The recommended weight is 20 to 50 times its own weight, and the maximum tensile force is close to 6000 kg. Progressive design leads to modifications to the internal and external structure. This produces robustness and reliability that is unmatched on the market today.

Application of permanent magnetic lifter

It is used for processing steel plates, blocks, round bars, die and loading and unloading on the machine. Such as thick plates, such as flat plates, blooms, old iron, square billets, double-layer billets, rolled steel strips, bundled rebars and rod coils, metals and various scrap steels.

Can be used for near flame cutting.

Can be used for mobile cranes.

The magnetic elevator can be used with a spreader beam that suspends multiple magnets.

The large magnetic lifter can powerfully help to easily carry iron plates and other objects. The small magnetic lifter also has many convenient functions. For example, it is convenient to store the nails. When the nails are scattered on the ground, you only need to use a magnetic lifter to absorb them like a vacuum cleaner, and then place it on the top of the storage box and pull the handle to close the magnetic lifter, the nails will fall in the box.

Precautions for the use of permanent magnetic lifter

In order to determine the weight that any permanent magnetic lifter can lift, the load characteristics other than weight must be considered. This statement applies to all lifting magnets because they all follow the same basic laws of physics. The magnetic force is depicted as the lines of force flowing from the north pole to the south pole. Anything that restricts the flow of these magnetic lines of force will significantly reduce the lifting capacity of the magnet.

In this permanent magnet lifter, there is a magnetic system formed of a NdFeB magnetic material with strong magnetism. It can control the magnetic switch by rotating the handle. It has the characteristics of no power consumption, small size, light weight, large clamping force, simple and safe operation, and constant magnetic field.

But neodymium magnets are easily damaged by heat, so you need to use them in a temperature-controlled environment and in materials that are not too hot.

The permanent magnetic lifter and the materials it lifts should be kept away from debris. When using a lift, a huge force pulls the lift and the ferromagnetic material together. Anything in between may be crushed, cut into the hoist or material, or even burst and be kicked out of the open space, causing safety hazards.

It is recommended to use within the rated tension range to ensure safety. Especially for whether the surface of the object being transported is smooth and flat, ensure a large enough contact area. If it is a cylinder, pick a place with a large contact area at both ends for grabbing. If the surface contact area is too small, there is a risk of falling.

Advantages of permanent magnetic lifter

Suitable for flat and round materials. Reduce the transportation cost, for thin plates, irregular shapes and objects that are not easy to bind have great advantages.
The operation method is simple and does not require personnel cooperation.
The neodymium magnetic power system is small, compact and light, with super magnetism.
No manual handling is required, which saves costs and improves safety.

Pot Cap Neodymium Magnets Φ16mmX5mm w/ M4 Internal Thread S-pole

Φ75mm Neodymium Pot Magnet with A M10 Bolt in the Center

Φ10X5mm Rare Earth NdFeB Threaded / Tapped Screw Plain Magnet

AlNiCo Magnets Used on Teaching / Educational

Φ10X7mm Rare Earth Neodymium Cap Pot Screw Fixing Magnets

Ø32mm Countersunk Shallow Pot Neodymium Magnets

Φ16mmX7mm Neodymium Shallow Pot Magnets with Internal Threaded Stem

Φ40mm Shallow NdFeB Pot Magnets with Cylindrical Hole

AlNiCo Magnets Used on Teaching / Educational

by jofovon 9 June 2021in AlNiCo Magnets, Application Of Magnets, Educational, Magnet Knowledge, Magnetic Industry, Magnetic Materials, Permanent Magnet

AlNiCo Magnets Used on Teaching / Educational, The Application of AlNiCo Magnets, Teaching Magnets, Educational Magnets

Aluminum nickel cobalt permanent magnet (following shorted as AlNiCo magnets) is an alloy consisting of aluminum, nickel, cobalt, iron and other trace metal elements,It divided into sintered AlNiCo magnets and cast AlNiCo magnets. The magnetic properties of the cast aluminium-nickel-cobalt magnets are high and can be processed into different sizes and shapes. The process of sintered aluminium nickel cobalt magnets is simple and can be directly pressed to the required size. The corrosion ability of AlNiCo magnet is stronger, so surface plating treatment is not needed for it.

AlNiCo Magnets Used on Teaching Educational

Cast AlNiCo magnets are used to make teaching magnets. Teaching magnets(also called educational magnets) are used as teaching tools for the teaching experiment demonstration (physics science experiment curriculum, primary school middle school. The teaching magnets/educational magnets can also be used for students stationery, toys etc… It can make students intuitive feelings of the real existence and change of magnetic field, and can vividly express the specific physical characteristics, can arouse the students’ interest in learning, so that their attention, stimulate their thinking and imagination.Thus, it will help and promote the understanding and cognition of the magnetic field for primary and secondary school students and children. Magnetic field is beneficial and harmless to humans, the child may also use a magnet N pole; the S pole and the repulsion of the earth’s magnetic field, the magnetic attraction principle, make magnets into compass.In order to fully mobilize and develop their creative potential, develop thinking and willing to delve into the good learning attitude of inertia!

The commonly used teaching magnets/educational magnets are bar magnets, U magnet (also known as horseshoe type), and occasionally use with other special-shaped magnets, such as star magnets, ring magnets, heart magnets, triangle magnets and arrow magnets.

Neodymium Screw-on Pot Magnet D50.8mm

Ø13mm Extreme Strong Mounting Neodymium Cup Countersunk Magnet

Neodymium Countersunk U-profile Assembly Magnet Shielded System Ø20mm

Neodymium Cap Pot Magnet with Cylindrical Borehole D60mm

Ndfeb Flat Cup Notice Board Magnet Ø20mm

Magnetic Properties

The Application Of Rare-Earth Permanent Magnets

by jofovon 6 June 2021in Application Of Magnets, Automobile, Electric Vehicles, Loudspeaker, Magnet Knowledge, Magnetic Industry, Medical, Motors, Neodymium Magnets, Permanent Magnet, Rare Earth Magnets

The Application Of Rare-Earth Permanent Magnets

1. Rare-earth magnets application for micro-special motors

In America, Japan and West-Europe developed countries, rare-earth magnets application for motors takes up above 60% of the total sales volume of rare earth magnets. National conditions are different, rare-earth magnets application conditions are also different each other for motors field. For Japan, VCM application takes up about 50% of rare earth permanent magnet. For America,rare-earth permanent magnets are largely applied in the motors for the field of spaceflight, military project, automobile, computer number control etc. For Europe, rare-earth magnets mostly used in computer number controls.

In the year 2006, our country produced around 37000 myriad sets of rare-earth permanent magnet motors, 50000 sets of them are middle-large size energy-efficient motors.

The Application Of Rare-Earth Permanent Magnets

2. Rare earth magnets are important material base for automobile industry

Rare earth magnets are important material base for automobile industry

The latest survey report of market research firm shows that global car and light vehicle yield was up to 5490 myriad sets in the year 2004, and it reached 6000 myriad sets in the year 2005.

Automobile industry already becomes to be the fifth pillar industry in the national economy in China. Its development will surely drive series of industries, including magnetic material industry. One of the biggest application markets for rare-earth permanent magnet motors is automobile industry. The automobile industry is one of the largest fields for the application of neodymium permanent magnets. There are tons of parts that uses permanent magnets motor in everyone automobile. Along with the requirement of electronic technique constantly improved, the permanent magnets motor will be used more and more in automobiles.

3. Rare earth permanent magnets widely used on electric vehicles

Rare earth permanent magnets widely used on electric vehicles

Various countries in the world pay close attention to electric vehicles, some countries input a lot of money on electric vehicle development. Motor and drive system is the heart of the electric vehicle. Because of the advantages of small size, high efficiency and excellent property, rare earth permanent magnets became to be the first choice for every country when the develop the new electric vehicle.

It can be foresight, in the near future, the joint-power electric vehicle will mass enter normal families, it will be mass consumption. This is very substantial for driving rare earth permanent magnet motors and NdFeB permanent magnet material.

4. Rare-earth permanent magnets application for electric bicycle

Rare-earth permanent magnets application for electric bicycle

The bicycle is one of traditional pillar industries for China, as the standard of living improved these years, the demands for an electric bicycle is more and more. The yield was over 1000 myriad sets in 2006. Average 0.3kgs sintered NdFeB magnets need for everyone set of electric bicycle, and 3000tons sintered NdFeB magnets used in one year, convert into 6000 tons rough NdFeB magnetic material.

5. Rare earth permanent magnets are used on modern medical equipment, there are mass rare earth magnets in every set of NMR equipment.

Rare earth permanent magnets are used on modern medical equipment,there are mass rare earth magnets in every set of NMR equipment

Permanent magnet RMI-CT nuclear magnetic resonance(NMR)imaging equipment used ferrite permanent magnets in the past, magnetic body weight was up to 50 tons. Now it uses the latest neodymium permanent magnets, its magnetic field intensity increased by double, image clarity also improved too much and saved abundant raw magnetic material. Every set of NMR imagines equipment need about 0.5-3 tons of neodymium permanent magnets. According to the 1000sets of world demands, 500-3000 tons NdFeB permanent magnets needed per year.

6. Loudspeaker rare earth magnets, headphone rare-earth magnets, rare earth permanent magnets for the electroacoustic component.

Loudspeaker rare earth magnets,headphone rare-earth magnets, rare earth permanent magnets for electroacoustic component

Loudspeaker and headphone are traditional application field of permanent magnets. After rare earth permanent magnets appeared, with the same output power and tone, the size can be reduced and property can be improved by using neodymium permanent magnets. At present, rare earth permanent magnets loudspeaker and headphone already used in the advanced personal stereo field. As electroacoustic component develops toward high definition and miniaturization, the higher property magnets are needed, in this field, NdFeB magnets material already got widely used.

7. Rare earth permanent magnets abundantly used on magnetic suspension train

Rare earth permanent magnets abundantly used on magnetic suspension train

The principle of magnetic suspension train is use combined the action of the repulsive force and attraction force which produced between on-board magnets and orbital magnets, so that produce levitation force upward, make the train running out of orbit. The used magnets are rare earth permanent magnets.
China No-06 magnetic suspension train appeared in Dalian in the year of 2005,3Kms permanent magnetic suspension train line that uses neo-iron-boron magnets included in the construction schedule.

Recent years，Magplane International Ltd recommended America magnetic suspension plane system. It adopted new type suspension design which uses neodymium magnets. It needs to match 2 sets of magnetic suspension plane(train) for every one kilometer, each set will use about 10 tons sintered neodymium magnets. Testing is underway.

Ø75mm NdFeB Flat Cup Magnet with Threaded Hole

Holding Mounting Neo Pot Magnet with Screw Hole Ø38mm

NdFeB Internal Thread Pot Magnets Ø60mm

Flat Pot Magnet Cylindrical with Internal Thread NdFeB Ø63mm

Ø36mm Countersunk Bore NdFeB Cup Cap Magnet

Ø32mm Countersunk Shallow Pot Neodymium Magnets

Neodymium Female Threaded Pot Magnet Ø50mm

Rare Earth Neodymium Magnets NdFeB

by jofovon 30 April 2021in Neodymium Magnets, Permanent Magnet, Rare Earth Magnets

Rare Earth Neodymium Magnets NdFeB

Rare earth neodymium magnets (NdFeB), commonly known as neos, are the strongest permanent magnets available. Neos are created from an alloy that primarily consists of neodymium (Nd), iron (Fe) and boron (B) and are used across numerous industries and applications from mobile phones and computers to wind turbines.

Neodymium magnets are powerful yet discreet magnets, providing a far greater magnetic hold than other magnets at a fraction of the size. This makes neos a versatile option and particularly suited to applications where an unobtrusive solution is required or where space is at a premium.

Rare earth neodymium magnets (NdFeB)

Our range of rare earth neodymium magnets is made up of an array of shapes and sizes to facilitate multiple uses, including but not limited to holding and hanging functions and closure applications.

All our neodymium magnets are finished with a triple coating of nickel-copper-nickel to prevent corrosion and provide optimum performance up to 60°C.

Our standard stock neodymium magnets are graded at N35, this is the most cost effective rating for use in retail displays, POS, exhibitions and closures. We can also supply higher rated magnets for specialist applications, including magnets for use in high temperature environments.

PRODUCT OPTIONS

NEODYMIUM DISC MAGNETS
Pull Forces from 0.21kg to 20.63kg.
Standard Diameters from 3mm to 25mm.
Standard Depths from 0.5mm to 10mm.
Self-Adhesive versions:
10mmØ x 1mm, 0.3kg pull force.
20mmØ x 1mm, 1.5kg pull force.

NEODYMIUM BAR BLOCK MAGNETS
Pull Forces from 1.05kg to 43.13kg.
Standard Lengths from 10mm to 50mm.
Standard Widths from 4mm to 22mm.
Standard Thickness from 1.5mm to 18mm.
Self-Adhesive versions:
50mm x 10mm x 1.5mm, pull force 2.5 kg pull force.
25mm x 10 mm x 1 mm, 1.5 kg pull force.

NEODYMIUM RING MAGNETS
Pull Forces from 2.082kg to 18kg.
Standard External Ø from 12mm to 136mm.
Standard Internal Ø from 4mm to 84mm.
Standard Thickness from 5mm to 10mm.

COUNTERSUNK NEODYMIUM MAGNETS
Standard External Ø 12mm or 20mm.
Standard Internal Ø 4mm or 6.4mm.
Standard Thickness 5mm.

NON STANDARD SIZES & RATINGS
For specialist industries or applications, we can supply neodymium magnets of different sizes and strengths with different operating tolerances. Please contact us for advice on which neo would best suit your application.

Whiteboard Fridge Holding Eyelet Magnet D6mm

D8mm Fridge Message Board Eyebolt Pot Anchor Magnet

Small Office Home Memo Loop Pot Magnets D10mm

D25mm NdFeB Pot Eyelet Mounting Magnet Secure Fastening

Neodymium Eyebolt Magnet with Loop Dia 48mm