Supply chain investments, expanded samarium cobalt capacity, and sustainability support growth and reshoring initiatives in U.S., Europe, and Asia Pacific Regions.

Rochester, NY: Arnold Magnetic Technologies Corporation (“Arnold”), a subsidiary of Compass Diversified (NYSE: CODI) and leading global manufacturer of high-performance magnets and precision components, announces its readiness to meet growing demand as U.S. and European industries accelerate onshoring along with global reduction of dependence upon China. Over the past five years, Arnold has invested over $50 million for facility improvements, manufacturing technology upgrades, and capacity expansion to ensure customers continue to receive the outstanding service and exceptional quality they’ve come to expect from Arnold.

In parallel, the Company entered into a strategic agreement with supply chain partners to ensure a reliable source of supply for samarium raw material outside of China. This rare earth element is critical in manufacturing the world’s highest performing magnets designed to meet mission critical applications under the toughest of operating environments. Given the uncertainty as to the future of China’s severe rare earth element export controls, Arnold has secured continuity of supply for this raw material to ensure our customer’s continued growth.

Arnold is also excited to announce the commissioning of a new permanent magnets manufacturing facility in Thailand to reduce dependency upon China while maintaining commercially competitive cost efficiency, access to skilled labor, proximity to growing markets, and strong supply chain ecosystems. With this investment, Arnold is poised to more than double the output of samarium cobalt (SmCo) magnets and to remain the pre-eminent leader for the industry.

“Our investment strategy has significantly strengthened our manufacturing capabilities and expanded capacity, positioning Arnold to confidently meet the growing demand as more companies move to onshore their supply chains. We are ready and excited to pursue new business opportunities and continue delivering the quality and innovation our customers expect.” said Aaron Williams, Chief Commercial Officer of Arnold Magnetic Technologies.

About Arnold Magnetic Technologies

Based in Rochester, NY with an operating history of over 130 years, Arnold is a leading global manufacturer of engineered solutions for a wide range of specialty applications and end-markets, including aerospace and defense, general industrial, motorsport, oil and gas, medical, and energy. From its Technology Center and manufacturing facilities located in the United States, the United Kingdom, Switzerland, Thailand, and China, the company produces engineered magnetic assemblies in addition to high-performance permanent magnets, precision foil products, and highly loaded composites that are mission critical in motors, generators, sensors, and other systems and components. Based on its long-term relationships, the company has built a diverse and blue-chip customer base totaling more than 2,000 clients worldwide. For more information on Arnold, specifically the Precision Thin Metals division, visit https://www.precisionthinmetals.com.

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Recent export restrictions from the United States and China have created global supply chain instability, leading to growing concern regarding the seven rare earth elements used to manufacture Samarium Cobalt and Neodymium Iron Boron permanent magnets. These critical magnets are used in a variety of applications including electric motors of all sizes, pipeline safety tools, telecommunications and medical devices, as well as defense projects.

Thanks to Arnold’s well-established and proactive global team, Arnold Magnetic Technologies has been able to secure licenses for a variety of our customers’ programs. Ensuring minimal supply chain disruption and stability is part of Arnold’s promise to delight our customers and consistently deliver World Class Service; and we take pride in our ability to deliver on those goals even during this time of global volatility.

Arnold has shown that our 130 years of relationships and industry connections that have been forged continue to provide our customers with assurance and security. Despite a constantly changing atmosphere, Arnold can provide the magnets and assemblies customers need without cutting corners on compliance or quality.

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Rochester, NY: Arnold Magnetic Technologies Corporation (“Arnold”), a leading global manufacturer of high-performance magnets, electric motors and precision thin metals, announces a significant leadership transition. Matthew Blake has assumed the role of Chief Executive Officer effective March 31, 2025. Blake succeeds Dan Miller, who held the position for the past nine years.

During his tenure, Dan Miller made substantial contributions to Arnold’s growth and success. Under Miller’s leadership, the company strengthened its position as a leading solutions provider, successfully navigated the COVID-19 pandemic, and oversaw a recent facility relocation. Miller’s strategic vision was instrumental in spearheading the launch of the world’s strongest Samarium Cobalt magnet grade, RECOMA 35E, and instilling a culture that fosters teamwork, communication, and operational excellence.

Matthew Blake brings his extensive global operations experience across various industrial end-markets to his new role as CEO. His career includes leadership positions at DwyerOmega, Alpha Packaging, Cleaver-Brooks, and ESAB Welding & Cutting Products. Blake holds a Master of Science in Engineering and Global Operations Management from Clarkson University, as well as an MBA from Webster University.

As CEO, Blake will leverage his substantial industrial experience and strategic acumen to drive Arnold into its next stage of growth and innovation. His strong track record in driving expansion, operational excellence, and strategic execution positions him well to build upon the strong foundations laid by his predecessor.

“I’m thrilled for the privilege to lead the exceptional team at Arnold Magnetic Technologies as CEO,” Blake states. “The opportunity to build on our rapid growth while partnering with customers to scale technology solutions that will reshape industries, is one I simply could not refuse. I was further impressed by the Company’s remarkable 130-year history of innovating, engineering, and manufacturing world-class products with the highest standards for quality, reliability, and performance.”

To ensure a smooth transition, Dan Miller will continue to serve in an advisory role until April 30, 2025.

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About Arnold Magnetic Technologies Based in Rochester, NY with an operating history of over 130 years, Arnold is a leading global manufacturer of engineered solutions for a wide range of specialty applications and end-markets, including aerospace and defense, general industrial, motorsport, oil and gas, medical, and energy. From its Technology Center and manufacturing facilities located in the United States, the United Kingdom, Switzerland, Thailand, and China, the company produces engineered magnetic assemblies in addition to high-performance permanent magnets, precision foil products, and highly loaded composites that are mission critical in motors, generators, sensors, and other systems and components. Based on its long-term relationships, the company has built a diverse and blue-chip customer base totaling more than 2,000 clients worldwide. For more information on Arnold, visit https://www.arnoldmagnetics.com.

Compass Diversified Announces Appointment of Matthew Blake

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Rochester, NY: Arnold Magnetic Technologies Corporation (“Arnold”), a leading global manufacturer of high-performance magnets, electric motors and precision thin metals, marks its 130th anniversary in 2025, celebrating a storied history of engineering excellence and a forward-looking approach to innovation. Founded in 1895 by renowned electrical engineer Bion J. Arnold, the company has grown from designing power systems for electric railroads to becoming a global leader in engineered solutions. As a subsidiary of Compass Diversified (CODI), Arnold benefits from the strategic support and leadership of its parent company.

This milestone anniversary comes as Arnold unveils two major investments: the opening of a state-of-the-art facility in Woodstock, IL, and the launch of a new production site in Thailand. These developments underscore the company’s commitment to its customers, employees, and the environment, reflecting its enduring mission to “Engineer Solutions Together.”

“Arnold’s 130-year legacy is built on innovation, collaboration, and continuous improvement,” said Dan Miller, CEO. “Our recent expansions in Woodstock and Thailand showcase how we’re not only honoring our past but also preparing for an exciting future of global growth and technological leadership.”

Arnold traces its roots to the late 19th century, when Bion J. Arnold, a close associate of Thomas Edison and Charles Steinmetz, patented the first magnetic clutch in 1898. This invention revolutionized electric power generation and laid the foundation for decades of advancements. In the 1940s, Arnold contributed to World War II efforts by producing Alnico magnets for Sherman tanks and proximity fuses for motor and anti-aircraft shells.

The post-war years saw further innovation, including the introduction of ceramic magnets, samarium cobalt magnets, precision thin metals, electromagnetics, and bonded magnets used in aerospace, automotive, and medical applications. In 2016, Arnold launched the RECOMA® 35E, the world’s strongest samarium cobalt magnet grade, enabling unparalleled performance in high-temperature environments.

Arnold’s commitment to cutting-edge technology and sustainability continues to drive its growth. Recent highlights include:

• Woodstock Facility: Opening in January 2025, this 130,000-square-foot facility will be the new home for Arnold’s Alnico and Precision Thin Metals divisions. The facility reflects the company’s focus on modernization and efficiency while easing the transition for its team from Marengo, IL.
• Thailand Expansion: In 2024, Arnold opened a 26,250-square-foot manufacturing site in Chonburi, Thailand, producing magnet assemblies, rotors, and motors to meet growing demand in the Asia-Pacific region.
• Technology Centers: With a flagship R&D center in Middleton, WI, and additional locations in Sheffield, UK and Switzerland, Arnold remains at the forefront of innovation in magnetic materials and systems.

As a key supplier for the electrification of transportation, Arnold plays a critical role in advancing sustainable energy solutions. By producing materials for electric vehicles, aerospace, and renewable energy systems, the company is driving change in industries critical to a greener future. With plans to further invest in its employees, facilities, and cutting-edge technologies, Arnold Magnetic Technologies continues to solidify its place as a trusted partner in shaping the future of Aerospace, Defense, Energy, Transportation, and beyond.

About Arnold Magnetic Technologies

Based in Rochester, NY with an operating history of 130 years, Arnold is a leading global manufacturer of engineered solutions for a wide range of specialty applications and end-markets, including aerospace and defense, general industrial, motorsport, oil and gas, medical, and energy. From its Technology Center and manufacturing facilities located in the United States, the United Kingdom, Switzerland, Thailand and China, the company produces engineered magnetic assemblies in addition to high-performance permanent and electromagnets, precision foil products, and highly loaded composites that are mission critical in motors, generators, sensors, and other systems and components. Based on its long-term relationships, the company has built a diverse and blue-chip customer base totaling more than 2,000 clients worldwide. For more information on Arnold, visit https://www.arnoldmagnetics.com.   

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What is fusion?

In this context, nuclear fusion is the process whereby smaller atomic structures combine — fuse together — to form a larger atom, releasing a tremendous amount of energy. This type of reaction takes place…

Related: Financial Times – Nuclear fusion power edges from fantasy to reality

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Electric motors and marine propulsion are a natural fit. An electric motor has a wide efficiency band and delivers full torque at zero RPM. Plus, it produces zero direct emissions, is quiet and requires almost no maintenance compared to a motor with an internal combustion engine.

Converting a boat from gasoline to electric isn’t as straightforward as dropping in a battery and motor from a car, though. Since boat drag increases with speed, the energy to move a boat through water is far greater than required for an equivalent electric vehicle. Developing a marine electric motor takes specialized expertise in electric motor design; this is where Arnold excels.

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March 07, 2022

There is a longstanding, general trend of replacing internal combustion engines, hydraulic or pneumatic motors and drives with advanced electric motor systems. The driving force behind this is the need for more energy-efficient systems, which typically lower operating costs, reduce overall emissions and enhance performance.

The main selection criteria are energy efficiency, power density and cost of electrical motor technology. There are three main electrical motor topologies to consider, with vast potential for surface permanent magnet (PM) motors to provide performance and energy efficiency required to unleash the latest electrification application.

Motor topology selection

Of the various modern electrical motor technologies, the most common three are induction machine, surface PM and switched reluctance. As indicated by Figure 1, both induction machine and switched reluctance topologies allow for relatively simple construction, low cost and no need for PM excitation when compared to surface PM topologies. However, neither induction machine nor switch reluctance topologies can deliver the same level of energy efficiency, torque control and torque-inertia ratio as surface PM topologies.

With surface PM topologies, however, PMs are necessary and present several considerations and challenges that must be overcome. A pertinent consideration with surface PM motors is that PMs generally reduce magnet field strength as temperature increases.

Features of surface PM electrical motor topologies

Fortunately, there are adequate design-freedom and surface PM variations that can boost surface PM motor efficiency, manufacturability and other features altogether. For instance, when comparing Halbach and parallel magnet surface PM motors, parallel magnet torque is dictated by magnet width, where torque ripple is also sensitive to magnet width (Figure 2). This relationship limits parallel surface PM motor design when designing for optimal flux.

However, a multi-segment Halbach magnet array can provide high flux in a compact space, especially if wedge-shaped magnets are used. Although linear Halbach array behavior is well defined, precision magnetic finite element analysis (FEA) is needed to optimize the performance of round rotor Halbach arrays. It can be seen in Figures 3 and 4 that the overall magnetization pattern results for the radial flux density at 1 mm distance from the rotor surface indicate that the lowest flux density option is the parallel magnet pattern, and that the all wedge-shaped pole and tangential magnet four-segment Halbach array perform close to the ideal Halbach array pattern. This demonstrates that a four-segment radial Halbach array rotor can provide greater performance while minimizing manufacturability difficulty and even cost.

Figure 5 shows an example four-segment Halbach array with wedge shaped pole and tangential magnets. The following data comparing various configurations of a four-segment Halbach array is used as an example of how surface PM motor topologies can be configured to optimize manufacturability, cost and power density. In this comparison, the graph results are normalized based on the ratio of the pole magnet (Spm) at the outer radius of the rotor and the arc length divided by the pole pitch (Spp). For reference, an Spm/Spp ratio of 0.0 would indicate only tangential magnets are used and a ratio of 1.0 would be that only pole magnets are used.

The results of the study show that using a combination of wedge/rectangular tangential and pole magnets and even a combination of Recoma ^(R) 35E and lower strength Recoma ^(R) R30 can enable high performance surface PM motors that benefit from lower cost and greater ease-of-manufacturing while also enhancing torque compared to the all-wedge and all Recoma ^(R) 35E configuration (Figure 6).

Conclusion

Radial and multi-segment Halbach array surface PM electrical motors exhibit excellent performance characteristics while providing energy efficiency for emerging automotive, aerospace and other applications. With thoughtful design, material selection and the latest magnetic technologies, these motors can be made to fit an extremely wide range of use cases and can even be optimized for cost and manufacturability as well as performance. 

Originally Published on Engineering360

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Arnold provides materials and products used in aviation, satellites, and a wide range of critical applications where quality and performance are of utmost importance. Extreme temperatures and corrosive environments call for RECOMA® Samarium Cobalt; an ideal choice for permanent magnetic applications which are expected to perform flawlessly for extended periods and with little or no maintenance. Aerospace and defense customers also choose our thin and ultra-thin titanium to create lighter-weight structural sections and Arnon, our Non-Grain Oriented Silicon Steel (NGOES) to increase the efficiency of permanent magnet motors. (Nadcap certified for Heat Treatment.)

Attendees can meet with Arnold representatives to explore possible solutions for their designs using permanent magnets, magnetic assemblies and thin metals like titanium.

If you’re planning to attend, you can use the SpaceTech Expo’s B2B meetings portal to schedule an appointment with Donna Yon or Scott Huang today.

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