Industrial Rare Earth Magnets

Powerful rare earth magnets for a wide range of applications

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Rare earth magnets in different shapes

Overview

Industrial rare earth magnets, or rare earth permanent magnets, are magnets made from alloys of rare earth elements, including neodymium iron boron or samarium cobalt.

They are currently the strongest type of permanent magnet, producing significantly stronger magnetic fields than other types, such as ceramic or alnico magnets. 

This quality has led to them replacing alnico and ferrite magnets in many applications, including head actuators for computer hard disks, magnetic resonance imaging (MRI) systems, loudspeakers and headphones, motors, and more. 

At Adams Magnetic Products, we’ve engineered and manufactured magnetic products for over 75 years. 

This extensive experience as a rare earth magnet supplier provides us with the knowledge and skills needed to deliver magnet solutions for nearly any customer application. 

Below, we highlight the industrial rare earth magnets our magnet company offers and outline some of their typical applications.

When you need magnet assemblies and permanent magnets that perform optimally over the long term in the toughest conditions, Adams delivers. 

Let us employ our knowledge of the physical and mechanical properties of magnetic materials from the earliest stages of your design to suggest the most effective, lightest, and cost-effective options.

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Neodymium Magnets

If you need neodymium rare earth magnets, give us a call. We will answer your questions and guide you toward the most effective magnetic solutions.

Whether it’s selecting a rare earth permanent magnet for a particular application and environment, choosing the most cost-effective material, or reviewing the available options of industrial rare earth magnets, we are here to help with:

  • Highest power-to-weight ratio
  • High resistance to demagnetization
  • Low machinability (no conventional drilling, turning, or milling)
  • Suitability for magnetization in any direction and multiple-pole magnetization

In many cases, neodymium magnets are a less brittle and more economical alternative to samarium cobalt magnets. 

However, they are only suitable for certain applications because of their sensitivity to high temperatures and susceptibility to oxidation. 

As an industrial rare earth magnet supplier, we offer the following types of neodymium magnets:

Periodic table graphic highlighting the Nd element.
Two stacks of round brown discs with white spacers.

Samarium Cobalt Magnets

Like neodymium iron boron, samarium cobalt is a rare earth material available in both sintered and bonded forms.

The two materials share many attributes, including high Br, high Hc, relatively high BHmax (approximately 18–33 MGOe), high resistance to demagnetization, low machinability, and suitability for multiple-pole magnetization, given that the proper magnetizing fixture is available.

However, compared to neodymium iron boron, samarium cobalt offers greater corrosion resistance and thermal stability, making it better suited for applications involving corrosive chemicals or extreme temperatures.

We offer the following types of samarium cobalt magnets:

Demagnetization Curves of Rare Earth Magnet Products

It’s important to know that many factors influence how industrial rare earth magnets will perform within a magnetic circuit, such as their permeance coefficient and operating environment. 

Permanent magnets that are fully magnetized have magnetic domains that are aligned in a specific way. 

Certain conditions can cause some domains to fall out of alignment, triggering the magnet to lose some or all of its magnetic field. 

The two primary ways a permanent magnet can be demagnetized are by:

  • Heating: All magnetic materials have a temperature limit known as the Curie temperature, even industrial rare earth magnets. At this point, the thermal agitations within the material apply more force than the resistance to movement provided by the magnetic domains. When the bulk of the material reaches this temperature, it shows virtually no net magnetization.
  • Applying a demagnetizing field: A magnet can be partially demagnetized by applying a reverse magnetic field to it. This effect can be studied by looking at its demagnetization curve, which provides information about the magnetic characteristics, including how strong its magnetic field is and how resistant it is to demagnetization.

Click to view the demagnetization curves for our rare earth magnets.

Metal blocks, rings, and a curved piece with overlay.
A long-winged aircraft above clouds at dusk.

Applications of Industrial Rare Earth Magnets

At Adams Magnetic Products, we offer a wide range of nickel-plated neodymium and samarium cobalt magnets available in disc, block, and ring shapes.

These rare earth permanent magnets are available in various diameters, thicknesses, and grades to suit different magnet applications. 

Our magnets are used for the following:

If the application requires the magnet to be glued in or on the assembly, several factors must be considered to ensure the effective performance of the magnet, the adhesive, and the resulting bond. 

These include the chemical and physical properties of the magnets and the surfaces to which they are affixed.

Industrial Rare Earth Magnets from Adams Magnetic Products

Our Adams technical experts are ready to answer your questions and recommend the best type of magnetic components for your specific application.

Whether you need fabricated magnetic products built to exact specifications, help identifying a problem, or simply want to discuss the pros and cons of available options, we aren’t just a rare earth magnets supplier. We’re here to help, and this is how:

  • Application and Design Engineering Assistance
  • Testing/Analysis of Magnetic Materials
  • Magnetic Circuit Analysis/FEA
  • Value Analysis/Value Engineering Support
  • Inventory Management Programs

By partnering with us for your magnet needs, you benefit from our expertise in providing rare earth permanent magnets that meet the highest standards for durability and strength. Adams is dedicated to:

  • Commitment to value. We define value as having the right industrial rare earth magnets and magnetic products available at the right time and delivering them as promised, defect-free, at competitive prices. We are committed to delivering outstanding value to customers at every opportunity.
  • Commitment to quality. We maintain ISO 9001:2015 certification, reinforcing our strong operational processes and commitment to continuous improvement. As rare earth magnet suppliers, we have a standard of zero defects in everything we do.

For more information on rare earth magnets, check out our rare earth resource library or use our magnetic field calculator. 

To get started on choosing industrial rare earth magnets for your application, request a quote.

Man operating blue and yellow industrial machinery.

Interested in Learning More?

Adams Magnetic Products is ready to be a part of your products with off-the-shelf and custom applications. Contact us to find out more.

Frequently Asked Questions

Can rare earth magnets be remagnetized if they lose strength?

In many cases, yes. We use specialized equipment for this, but we still recommend proper use to avoid demagnetization entirely if possible.

That selection depends on factors like environment and assembly method. For instance, nickel-copper-nickel is the default for corrosion protection; zinc is economical; epoxy improves salt spray resistance; and gold is used when biocompatibility or solder-wetting is needed.

Standard NdFeB grades typically operate to about 80°C (higher for special high-temperature grades). SmCo retains magnetization much better at elevated temperatures and is commonly used at temperatures up to 250°C to 350°C.

Absolutely. They can be fabricated into blocks, discs, rings, rare earth magnet strips, or specialty forms depending on the design and application.

To find the right rare earth magnet fabricator, look for a magnet company that adheres to the highest quality technical standards and has ISO 9001:2015 certification and ITAR registration. Choose a company with extensive experience that offers engineering support and that can fabricate magnetic products to meet exacting and demanding specifications.