16 Bonded Magnet Manufacturers in 2023
This section provides an overview for bonded magnets as well as their applications and principles. Also, please take a look at the list of 16 bonded magnet manufacturers and their company rankings. Here are the top-ranked bonded magnet companies as of September, 2023: 1.GMB, 2.Ashvini Magnets Pvt. Ltd., 3.Evitron.
Table of Contents
What Is a Bonded Magnet?
Bonded magnet is a generic term for magnets that are processed and molded by kneading fine-grained magnets into rubber or plastic.
Regular ferrite magnets are used as door seals for refrigerators and showcases or as whiteboards by making them into boards and processing their surfaces with plastics.
Rare earth magnets with high magnetic force, such as neodymium magnets, are molded into various shapes and used in industrial applications such as small motors, electronic components, and train drive motors.
Uses of Bonded Magnets
Bonded magnets can be freely designed, manufactured, processed, and molded after production.
Ferrite magnets are easily used in daily life as magnetic tape and magnetic sheets and are also used for refrigerator doors and whiteboards.
Magnets with high magnetic force, such as neodymium magnets and samarium iron nitride magnets, are incorporated into small motors, used in hard disks, and are also used in drive motors for automobiles, trains, and elevators.
Principle of Bonded Magnets
Permanent magnets currently in industrial use are classified into a cast, sintered, and bonded magnets.
Bonded magnets (polymer bonded magnets) are manufactured from magnet compounds made by kneading and dispersing a high concentration of fine powder (magnetic powder) of ferrite magnets or rare earth magnets in a binder such as a polymer resin or rubber.
After manufacturing, they can be processed and molded into complex structures with high precision. They not only have excellent mechanical properties, such as resistance to cracking and chipping but can also be easily integrated with thin, long, and wide metal, which is impossible with cast or sintered magnets.
It can be mass-produced and has many advantages as an industrial material.
In particular, using rare earth magnets with high magnetic force is indispensable for small motors and electronic components widely used today. Further miniaturization and efficiency can be achieved by improving the performance of the bonded magnet itself.
Rare earth-bonded magnets are also helpful in making generators smaller and more powerful, and their use in the energy generation field is expected to expand in the future.
Difference Between Bonded Magnets and Sintered Magnets
Bonded magnets are made by solidifying magnetic powder with resin. On the other hand, sintered magnets are made by pressing magnetic powder and baking it at high temperatures.
In terms of magnetic properties and heat resistance, sintered magnets are superior to bonded magnets made by mixing resin. This is because the resin mixed in bonded magnets is a non-magnetic substance.
However, regarding dimensional accuracy, bonded magnets are superior because they are capable of more complex processing. This is because sintered magnets are subject to more significant sintering shrinkage during the manufacturing process.
Bonded Magnets Support the Evolution of Motors
Today, as environmental issues become more serious, the market for motors is also changing dramatically. Motors are used in various settings, including automobiles and home appliances, accounting for a large percentage of total power consumption in Japan. Saving electricity for motors is a critical issue for realizing a low-carbon society.
Against this backdrop, demand for PM motors is increasing.
PM motors with permanent magnets are more energy-efficient and efficient than non-permanent magnet motors (e.g., induction motors) because PM motors use permanent magnets in the rotor. This is because PM motors do not generate losses in the rotor. After all, the secondary current does not flow in the rotor.
PM motors are divided into two types according to the structure of the rotor: SPM motors and IPM motors. SPM motors have permanent magnets "stuck" to the rotor, and IPM motors have permanent magnets "embedded" in the rotor. IPM motors, with embedded magnets, can have higher speeds and increased mechanical safety.
Rare earth magnets with strong magnetic force support the technology of these PM motors. Still, rare earth magnets have been pointed out as a procurement risk due to soaring prices and unstable supply due to export restrictions in China and other factors.
In recent years, however, new technologies have been developed, such as the invention of IPM motors that utilize bonded magnets made from samarium, which are not rare earth magnets. Bonded magnets support the evolution of motors.
List of 16 Bonded Magnet Manufacturers
*Including some distributors, etc.
Sort by Features
- Default
- Company Size: largest first
- Year Founded: oldest first
- Year Founded: earliest first
Sort by Area
- United States of America
- China
- Germany
- India
- Japan
- Poland
-
-
-
DEXTER MAGNETIC TECHNOLOGIES
BONDED NEODYMIUM IRON BORON MAGNETS
Company Overview
DEXTER MAGNETIC TECHNOLOGIES, a renowned manufacturer of magnetic solutions, was established in 1951 in the United States. The company excels in producing an array of magnetic products, including precision magnetic assemblies and custom magnets. With a calling to innovation, DEXTER MAGNETIC TECHNOLOGIES has maintained a pioneering stance in magnetic technology advancement. Their expertise lies in offering cutting-edge magnetic solutions across industries like aerospace, medical, and automotive, resulting in elevated performance and efficiency. DEXTER MAGNETIC TECHNOLOGIES shines in devising tailored magnetic answers to address distinctive challenges. Notably, their precision magnetic assemblies play a crucial role in medical imaging equipment, ensuring precise diagnosis.
-
-
-
-
-
Alliance LLC
Bonded Magnets
Company Overview
Alliance LLC is a supplier of permanent magnets and a manufacturer of customized magnetic assemblies for the automotive, industrial, medical, alternative energy, and communication industries. The company has several locations in the US, including Indiana, Kentucky, California, and Texas, and one outside the US, Mexico. Additionally, the company has ISO9001:2015 certification, and all suppliers within the Alliance LLC group are certified with ISO14001 Environmental Standards. Alliance LLC offers various neodymium discs and blocks for developmental and prototype projects. In addition to manufacturing custom designed magnetic assemblies, the company also has an extensive inventory of Ferrites, NdFeB, and Bonded magnets.
-
-
-
-
-
Arnold Magnetic Technologies
Bonded Magnets
Company Overview
Arnold Magnetic Technologies is a manufacturer of magnets, magnetic assemblies, and precision thin metals based in New York since 1895. The company deals in permanent magnets, flexible composites, electromagnets, magnetic assemblies, and precision thin metal foils. The permanent magnets, such as L-Type Laminated ones have various applications in the aerospace, automotive, motorsport, and industrial markets. Similarly, alloy strips and foils are used in industries that need to improve the power density of motors, transformers, and batteries. The composite sheets and strips are used for X-ray and gamma-ray radiation absorption, and RFI/EMI shielding and electromagnets are vital for defense projects.
-
-
-
-
-
-
-
-
-
Bunting-DuBois
Bonded Magnets
Company Overview
Bunting Dubois began in 1959 as Bunting Magnetics, Co. in Chicago, Illinois as a magnet manufacturer. Today, the company is based in Bunting, Pennsylvania, has attained ISO 9001:2015 certification, and manufactures a full range of magnetics manufacturing with both ferrite and rare earth compounds for consumers around the world in industries spanning aerospace, automotive, medical, and industrial manufacturing. The company seeks to source magnetic material outside of China in conflict-free areas and performs 100% of manufacturing inside the United States. The company assists customers by providing engineering and application support to produce solutions, especially in the case of rare earth magnets.
-
-
-
-
-
CITIZEN FINEDEVICE CO.,LTD.
bonded neodymium magnet
Company Overview
CITIZEN FINEDEVICE CO., LTD. is a Japanese manufacturer headquartered in Fujiyoshida, Yamanashi. It was established in 1959 through the merger of three Japanese companies: Citizen Miyota Co., Ltd., Citizen Finetech Co., Ltd., and Citizen Seimitsu Co., Ltd. The company specializes in precise metal parts for automobiles and other products, including quartz oscillators and ceramic components. Production processes are supported by various technologies, such as precise metal part machining, thin-film technology, and sealing technology, catering to different applications. Since 2019, CITIZEN FINEDEVICE, along with its holding company CITIZEN Group, has actively implemented Responsible Minerals Procurement Policy and Environmental Policy.
-
-
-
-
-
Daido Steel Co., Ltd．
NITROQUENCH
Company Overview
Daido Steel Co., Ltd., originally founded in 1916 in Japan, is a manufacturer of alloy and tool steels. The company offers a wide range of products that include mechanical construction steels, superalloys used in engine components, welding wires, alloy powders, and permalloy foil. Daido Steel Co., Ltd.'s specialty steel products are used in the automotive parts, industrial machinery parts, electrical machinery parts, and welding markets. The company has diversified to include businesses in real estate, insurance, and the provision of welfare services and has expanded operations outside of Japan in North America, Asia, and Europe.
-
-
-
-
-
Shin-Etsu Chemical Co., Ltd.
N Series
Company Overview
Shin-Etsu Chemical Co., Ltd., founded in 1926 in Japan, is a manufacturer and distributor of synthetic chemicals and electronic materials, such as semiconductor silicon and rare earth quartz. The company offers a wide range of products, including silicone sealants and rubbers, as well as cellulose derivatives used in foods and pharmaceuticals, and rare earth magnets. The company has four core business segments, including infrastructure chemicals, electronics materials, silicone-based functional agents, and specialized engineering for the development of plant design, construction, and maintenance.
-
-
-
-
-
Sagami Chemical Metal Co., Ltd.
Neodymium Bonded Magnets
Company Overview
Founded in 1968, Sagami Chemical Metal Co., Ltd. is a Japanese manufacturer and distributor headquartered in Sagamihara, Kanagawa, specializing in permanent magnets. Rare-earth magnets, the strongest permanent magnet, are offered under the NEOFLUX lineup, comprising neodymium magnets that retain magnetism even with size and weight reduction. The company also provides samarium-cobalt magnets, a type of rare-earth magnets which is resistant to rust and high temperatures. Other product offerings include cast magnets, neodymium magnets, made from plastics and metal powder for flexible shaping, as well as corrosion-resistant ferrite magnets. Furthermore, the company offers magnet-based products such as vibration motors for mobile phones.
-
-
-
-
-
-
Dailymag Magnetic Technology
Bonded NdFeB Magnet
Company Overview
DailyMag Magnetic Technology, established in 2005, and based in Ningbo, China, is a manufacturer and supplier of professional magnets and tools. The product portfolio includes permanent magnets, magnetic assemblies, sharps containers, magnetic equipment, linear actuators, and magiko. The company also offers product development with innovation and high-performance technology. The products are used in various applications which include magnetic separators, torque drives, magnetos, generators, alternators, eddy current brakes, motors, meters, and other applications.
-
-
-
-
-
-
-
-
-
-
Bonded Magnet Manufacturer Ranking
*Including some distributors, etc.Ranking as of September 2023 in United States of America
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | GMB |
42.9%
|
| 2 | Ashvini Magnets Pvt. Ltd. |
14.3%
|
| 3 | Evitron |
14.3%
|
| 4 | HGT Advanced Magnets Co.,Ltd |
14.3%
|
| 5 | MMC Magnetics Corp |
14.3%
|
Ranking as of September 2023 Globally
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | GMB |
42.9%
|
| 2 | Ashvini Magnets Pvt. Ltd. |
14.3%
|
| 3 | Evitron |
14.3%
|
| 4 | HGT Advanced Magnets Co.,Ltd |
14.3%
|
| 5 | MMC Magnetics Corp |
14.3%
|
Derivation Method
The ranking is calculated based on the click share within the bonded magnet page as of September 2023. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
- Shin-Etsu Chemical Co., Ltd.: 24,954
- Daido Steel Co., Ltd．: 12,605
- Sagami Chemical Metal Co., Ltd.: 22
Newly Established Company
- Dailymag Magnetic Technology: 2005 (18 years ago)
- GMB: 1996 (27 years ago)
- Sagami Chemical Metal Co., Ltd.: 1968 (55 years ago)
Company with a History
- Daido Steel Co., Ltd．: 1916 (107 years ago)
- Shin-Etsu Chemical Co., Ltd.: 1926 (97 years ago)
- DEXTER MAGNETIC TECHNOLOGIES: 1951 (72 years ago)
List of Bonded Magnet Products
2 products are listed.
Daido Electronics
Equel SMFEN Bond magnet Nitroquench-P
It is an anatomic bond magnet in which the SM-FE-based alloy is made into a powder having a fine crystal grain by an ultra-cooling method, and a SM...
