If you are sourcing neodymium-iron-boron (NdFeB) magnets for a U.S. program, the honest starting point is this: most of the world's sintered NdFeB is still made overseas, domestic capacity is growing but small, and the right supplier depends heavily on your end-use and volume. This guide separates the companies that actually sinter NdFeB on U.S. soil from the established U.S. houses that machine and assemble it, from the international factory-direct suppliers that carry most commercial volume, so a buyer can match the source to the requirement instead of the marketing.
01 · What to look for
What buyers actually need from an NdFeB supplier
For a procurement engineer, the hard part isn't finding a company that will sell you magnets. It's finding one you can actually qualify: one that holds spec at temperature, ships certified to your industry, prices honestly, and keeps shipping when tariffs and export rules move. A supplier worth shortlisting covers:
End-use restrictions (defense/aerospace). If any part ends up in a U.S. defense system, DFARS 252.225-7052 restricts Chinese-origin rare-earth magnets, with a full supply-chain ban from January 1, 2027. Those programs require a domestic or allied-country source, so confirm end-use before you shortlist.
Certifications matched to your industry. IATF 16949 for automotive, AS9100 for aerospace, ISO 13485 for medical, ISO 9001 as a baseline. A supplier without the certification your industry demands cannot be qualified, regardless of price.
Magnet cost and GBD. On high-temperature grades, heavy-rare-earth (dysprosium/terbium) content drives cost. Grain-boundary diffusion (GBD) holds coercivity while cutting Dy/Tb content sharply (factory-verified: 75% less Dy), which is often the single largest lever on landed magnet cost.
Volume, MOQ, and lead time. Domestic producers are ramping and may favor large strategic offtakes; distributors serve small quantities at a premium; factory-direct international suppliers typically carry commercial volume with competitive lead times.
Assembly vs. bare magnets. A supplier that ships a finished, magnetized, balanced assembly to your drawing removes magnet handling, magnetizing, and balancing from your line, often worth more than the per-kilogram price on the magnet alone.
Supply continuity and second-sourcing. Tariffs and export controls move fast. A qualified second source, and a supplier with in-house export licensing, is the difference between a price negotiation and a stopped line.
The best magnet supplier isn't the one with the longest grade list. It's the one that can prove the grade holds at your operating temperature, certify it to your industry, and keep the line fed when the supply chain moves.
02 · The List
U.S. Magnet Manufacturers & Suppliers
Mainrich International
Est. 1994 · International, serving U.S. buyers (manufacturing partners in China)
Factory-direct sintered NdFeB grades N30-N58 through the AH high-temperature series, grain-boundary-diffusion (GBD) magnets, and finished, magnetized magnet assemblies built to drawing.
Best for: Commercial-volume NdFeB and assemblies, GBD cost reduction, second-source continuity
Certifications: IATF 16949 (production network), in-house export licensing
2.MP Materials
Est. 2017 · Las Vegas, NV (mine: Mountain Pass, CA; magnets: Fort Worth, TX)
Integrated mine-to-magnet: rare-earth mining and refining plus sintered NdFeB at its Fort Worth 'Independence' plant (first commercial magnets late 2025, ramping to automotive offtake).
3.Noveon Magnetics
Est. 2014 · San Marcos, TX
Sintered and bonded NdFeB produced domestically via a recycling-based process; the first and so far only operational U.S. sintered-NdFeB producer.
4.USA Rare Earth
Est. 2019 · Stillwater, OK (deposit: Round Top, TX)
Sintered NdFeB magnet line in Oklahoma (first commercial production commissioned 2026), paired with a domestic heavy-rare-earth resource.
Shortlisting suppliers for a U.S. program?
Send a drawing or a target spec and we'll quote the right grade or assembly, flagging any end-use restriction up front.
5.e-VAC Magnetics (Vacuumschmelze)
Sumter, SC (parent: Hanau, Germany)
New U.S. sintered-NdFeB plant (first U.S. magnets shipped late 2025); parent VAC is a century-old European rare-earth magnet maker.
6.Arnold Magnetic Technologies
Est. 1895 · Rochester, NY
Samarium-cobalt (RECOMA), alnico, bonded and flexible magnets, precision thin metals, and engineered NdFeB assemblies (machined and assembled, not domestically sintered).
7.Electron Energy Corporation
Est. 1970 · Landisville, PA
Vertically integrated samarium-cobalt magnets and assemblies, the only remaining U.S. sintered-SmCo producer; also NdFeB products and assemblies.
8.Thomas & Skinner
Est. 1901 · Indianapolis, IN
Cast and sintered alnico magnets, magnetic assemblies, and transformer laminations, manufactured in the U.S.
9.Bunting Magnetics
Est. 1959 · Newton, KS
Magnetic separation and metal-detection equipment, custom and bonded magnets, and magnetic assemblies.
Need a second source that keeps the line moving?
Mainrich qualifies as a factory-direct commercial source with in-house export licensing, so a qualified order keeps shipping through tariff and export-control disruption.
10.Dexter Magnetic Technologies
Est. 1951 · Elk Grove Village, IL
Engineered magnetic assemblies and circuits, sourcing, machining, magnetizing, and assembly (includes its MCE division for aerospace/defense).
11.Integrated Magnetics
Culver City, CA
Custom magnets and magnetic assemblies (Halbach arrays, rotors) across NdFeB, SmCo, alnico, and ferrite.
12.Stanford Magnets
Lake Forest, CA
U.S.-based supplier/distributor of NdFeB, SmCo, alnico and ceramic magnets sourced internationally.
13.Adams Magnetic Products
Est. 1950 · Elmhurst, IL
Custom fabricator and distributor of neodymium, SmCo, alnico, ceramic and flexible magnets and assemblies.
14.Master Magnetics (The Magnet Source)
Est. 1976 · Castle Rock, CO
Manufacturer and distributor of commercial, consumer and industrial magnets held in large domestic stock.
15.K&J Magnetics
Est. 2003 · Pipersville, PA
Online catalog distributor of stock NdFeB magnets with strong technical data tooling.
Suppliers are labelled by type so buyers can match a source to their end-use. Mainrich is listed first as our own recommendation for commercial-volume sourcing, and is labelled honestly as an international factory-direct supplier, not a domestic U.S. producer. Company facts (location, founding year, certifications) reflect public information and may change, so verify current certifications directly with each supplier during qualification.
03 · Market
The State of U.S. NdFeB Supply
Domestic sintered-NdFeB production in the United States is real in 2026 but starting from a very low base. A 2022 U.S. Commerce Department review found the country imported roughly 75% of its sintered NdFeB from China, and the IEA put China at about 94% of global rare-earth magnet production in 2024.
Against that backdrop, MP Materials is ramping integrated mine-to-magnet capacity in Texas, Noveon Magnetics in Texas is the first and so far only operational U.S. sintered-NdFeB producer (recycling-based feedstock), USA Rare Earth commissioned its first commercial line in Oklahoma in 2026, and Vacuumschmelze's e-VAC plant in South Carolina shipped its first U.S. magnets in late 2025.
Together these are a strategic foundation measured in a few thousand tonnes per year, material, but small next to China's hundreds of thousands of tonnes. In parallel, long-established U.S. magnet companies remain essential for samarium-cobalt, bonded and alnico magnets, precision machining, magnetizing, and finished assemblies, frequently importing the raw sintered NdFeB blank and adding the engineering value domestically.
The practical consequence for a buyer: for most commercial NdFeB volume you are choosing a supplier, not a country, and the qualification questions below matter more than the flag on the building.
04 · Our Position
Where Mainrich Fits
International factory-direct
Mainrich International is included here as what it is: an international, factory-direct NdFeB supplier serving U.S. buyers, not a domestic U.S. manufacturer. For U.S. defense and aerospace end-use bound by DFARS, a domestic or allied source above is the correct path. For commercial programs, EV traction, industrial automation, robotics, appliance, and sensor work, Mainrich competes on the things that move a commercial program: the full grade range (N30-N58 through the AH high-temperature series), GBD that cuts dysprosium/terbium cost (factory-verified: 75% less Dy) while holding coercivity, finished magnet assemblies built to your drawing rather than loose magnets, IATF 16949 quality across the production network, and in-house export licensing so a qualified order keeps shipping through disruption.
The honest role we ask for is the qualified commercial source, and, for buyers carrying single-source risk today, the second source that keeps the line moving.
FAQ · Questions
Frequently Asked Questions
Are there neodymium (NdFeB) magnet manufacturers in the USA?
Yes, but domestic sintered-NdFeB capacity is still ramping in 2026. Noveon Magnetics (Texas) is the first and only operational U.S. sintered-NdFeB producer, while MP Materials (Texas), USA Rare Earth (Oklahoma), and Vacuumschmelze's e-VAC plant (South Carolina) are bringing capacity online. Established U.S. companies such as Arnold, Electron Energy, Thomas & Skinner, Bunting, Dexter, and Integrated Magnetics manufacture magnets and assemblies domestically, often strongest in samarium-cobalt, bonded, and alnico magnets, and many import sintered NdFeB blocks that they machine, magnetize, and assemble in the U.S.
Can U.S. defense programs use Chinese-made neodymium magnets?
Generally no. DFARS 252.225-7052 restricts samarium-cobalt and NdFeB magnets of Chinese origin in covered U.S. defense items. Through the end of 2026 the restriction reaches magnets melted or produced in China; effective January 1, 2027 a full ban applies across the entire supply chain, mined, refined, separated, melted, or produced. Defense and aerospace programs should plan on a domestic or allied-country magnet source, and confirm a part's end-use early, because it determines which suppliers can even be shortlisted.
Is it cheaper to buy magnets from a U.S. manufacturer or to import them?
For most commercial NdFeB volume, factory-direct international supply is still the cost backbone, because the large majority of sintered-NdFeB capacity sits overseas. Domestic producers are ramping and often prioritize large strategic offtakes; U.S. distributors serve small quantities at a premium. The largest single cost lever on high-temperature grades is usually not the country of origin but the heavy-rare-earth content, which grain-boundary diffusion (GBD) can cut sharply while holding coercivity (factory-verified: 75% less Dy).
What certifications should a magnet supplier have?
Match the certification to your industry: IATF 16949 for automotive, AS9100 for aerospace, ISO 13485 for medical devices, and ISO 9001 as a baseline quality system. For defense end-use, ITAR registration and DFARS-compliant sourcing matter. A supplier without the certification your program requires cannot be qualified regardless of price, so screen on this first.
What is GBD and why does it lower magnet cost?
Grain-boundary diffusion (GBD) diffuses heavy rare earths (dysprosium and terbium) along the grain boundaries of a sintered NdFeB magnet rather than throughout the bulk. This achieves the same high-temperature coercivity using far less Dy/Tb, factory-verified at 75% less Dy with no Br loss, which directly lowers cost, since dysprosium and terbium are the most expensive and most supply-constrained inputs in a high-temperature magnet.
Should I single-source or second-source my magnet supply?
For anything but the smallest programs, qualify a second source. Tariffs, export controls, and capacity shifts move quickly, and a single qualified supplier is a single point of failure for your line. A common 2026 strategy is a domestic or allied source for restricted end-use plus a qualified factory-direct international source for commercial volume and cost, with a supplier that holds in-house export licensing so a qualified order keeps shipping through disruption.
Sourcing NdFeB for a U.S. program?
Send a drawing or a target specification. Our engineering team will quote the correct grade or assembly with real design margin, and flag any end-use restrictions up front. Human response within 1 business day; pricing within 2.