Top 10 Laminated Magnet Manufacturers in the USA 2026

Aug 03, 2026

In high-speed motors, generators, and axial-flux drive systems, rapidly changing magnetic fields induce eddy currents inside solid rare-earth magnets, generating heat and reducing efficiency. Laminated magnets — built by slicing a magnet into thin segments and bonding them together with an insulating layer — interrupt this current path, cutting eddy-current losses without sacrificing magnetic output. As EV, aerospace, and industrial automation OEMs push motor speeds and power density higher, sourcing a laminated magnet supplier with tight insulation-layer control, thermal stability, and application engineering support has become a critical design decision.

Insulation layer thickness, magnet fill fraction, base material (NdFeB or SmCo), and bonding process directly determine how much eddy-current loss a laminated magnet actually eliminates — and whether that improvement is worth its added manufacturing cost.

This buyer's guide profiles established Laminated Magnet Manufacturers serving the U.S. market in 2026, organized by manufacturing footprint, product architecture, and target industries. It also highlights Vanguard Technologies, an integrated magnet and precision-assembly supplier worth evaluating during the RFQ phase for programs that need custom magnet segmentation and rotor/stator sub-assembly consolidated under a single supply chain.

None of the companies below paid for inclusion or placement. Information is drawn from each company's own published materials as of mid-2026 — verify current certifications, capacity, and lead times directly with each supplier before making a sourcing decision.

In this guide

Key Selection Factors for Laminated Magnet Procurement
Quick Comparison Table
Manufacturer Profiles (#1–#10)
Featured Supply Chain Partner: Vanguard Technologies
Traditional U.S. Manufacturers vs. Integrated Supply Chain Partners
Frequently Asked Questions

Key Selection Factors for Laminated Magnet Procurement

Procuring a reliable laminated magnet requires verifying process control across insulation layer thickness, base magnet material, bonding integrity, and thermal performance. Key criteria to consider when evaluating suppliers include:

Insulation Layer Thickness. Thinner insulating layers between segments preserve more of the magnet's active volume (fill fraction), but require tighter process control to avoid electrical bridging between laminations.
Base Magnet Material. NdFeB laminated magnets offer higher energy density at moderate temperatures, while SmCo laminated magnets retain magnetic performance at higher operating temperatures — an important tradeoff for aerospace and high-duty-cycle motor applications.
Segmentation Geometry. Confirm whether the supplier can produce arc, tile, block, or fan-shaped laminated segments to match your rotor or stator's magnetic circuit, rather than only flat rectangular blocks.
Bonding & Encapsulation Process. Review the isolation adhesive and any surface coating (epoxy, nickel, or Ni-Cu-Ni) used to bond segments and protect against corrosion and delamination under thermal cycling.
Thermal Stability. Assess the magnet's rated maximum operating temperature and confirm it against the eddy-current heating the laminated design is meant to reduce.
Engineering & Simulation Support. Verify whether the supplier offers FEA-based eddy-current loss modeling to quantify the efficiency gain before committing to tooling.

Quick Comparison

Company	Headquarters	Primary Capabilities	Target Industries
Arnold Magnetic Technologies	Rochester, NY	L-Type laminated NdFeB/SmCo magnets, precision magnetic assemblies	Aerospace, defense, motion control, medical
Magnum Magnetics	Marietta, OH	Flexible bonded magnetic sheeting, strip & extrusion (adjacent segment)	Signage, printing, OEM & industrial labeling
HSMAG Magnets	China	Laminated NdFeB/SmCo magnetic cores, <20μm insulation layers	Aerospace, automotive, motorsport, industrial motors
SDM Magnetics Co., Ltd.	China	Laminated SmCo/NdFeB via segmentation & isolation bonding	Axial flux motors, EV drive systems
Tengye (Hangzhou Tengye Magnetic Materials)	Hangzhou, China	Custom laminated magnets, FEA-simulated segmentation design	Aerospace, motorsport, automotive, home appliance
mainrichmagnets.com (MainRich Magnets)	China / U.S. operations	NdFeB, SmCo & ferrite magnets, motor-grade custom assemblies	Industrial automation, EV, robotics
Stanford Magnets	China / U.S. sales office	Fan-shape & block laminated NdFeB magnets, epoxy/nickel coatings	High-speed motors, generators, transformers
Electron Energy Corporation	Landisville, PA	High-temperature SmCo magnets & laminated assemblies	Aerospace, defense, oil & gas, motion control
★ Vanguard Technologies	Ningbo, China	Integrated NdFeB/SmCo magnets + segmented magnet & rotor assembly	Global motor OEMs, industrial automation
MPCO Magnetics	China	MPCO-LAMS series laminated SmCo/NdFeB arc & segment magnets	Aerospace, automotive, motorsport, precision stators

Manufacturer Profiles

MFG · 01

Arnold Magnetic Technologies

HQ Rochester, NY Founded 1895 Certs ITAR Registered, DFARS Compliant Core Specialties L-Type Laminated Magnets, Precision Magnetic Assemblies

Arnold Magnetic Technologies is the sole U.S.-headquartered manufacturer on this list, and its L-Type laminated magnet line is engineered specifically to deliver the lowest achievable eddy-current loss for high-efficiency rotors, pump couplings, and aerospace assemblies. Operating manufacturing and technical facilities across nine locations in four countries, Arnold controls the process from raw NdFeB, SmCo, and Alnico magnet production through precision thin-metal fabrication and finished assembly.

Key Advantages: Only fully U.S.-based manufacturer in this roundup, ITAR/DFARS-compliant supply chain for defense and aerospace programs, and 130 years of magnetic materials engineering experience.

MFG · 02

Magnum Magnetics

HQ Marietta, OH Founded 1991 Core Specialties Flexible Bonded Magnetic Sheeting, Strip & Extrusion

Magnum Magnetics is one of the largest U.S. manufacturers of flexible permanent magnetic material, producing magnetic sheeting, strip, and custom extrusions across two Ohio facilities totaling 160,000 square feet. Its products are built on a bonded (rubber/ferrite composite) magnet platform rather than the segmented rare-earth lamination process used for high-speed motor applications — engineering teams evaluating this company should confirm which magnet technology their specific project requires before requesting a quote.

Key Advantages: Fully domestic U.S. production and testing, high-volume roll and sheet manufacturing capacity, and strong presence in OEM, signage, and industrial labeling applications.

MFG · 03

HSMAG Magnets

HQ China Core Specialties Laminated Magnetic Cores, Arc/Segment/Block Configurations

HSMAG manufactures laminated rare-earth magnetic cores designed to reduce eddy-current losses in high-efficiency motors, offering insulating layers under 20 micrometers and rated performance at operating temperatures up to 200°C. The company produces both NdFeB and SmCo laminated magnets in arc, segment, block, and tile geometries, with magnet layer thicknesses starting at 0.5mm to match a customer's magnetic-circuit fill-fraction requirements.

Key Advantages: Thin insulation layers that preserve magnet fill fraction, custom geometry support beyond flat blocks, and published eddy-current loss calculations to support engineering evaluation.

MFG · 04

SDM Magnetics Co., Ltd.

HQ China Core Specialties Laminated SmCo/NdFeB Magnets via Segmentation Bonding

SDM Magnetics builds laminated magnets by bonding multiple thin magnet segments together with an isolation adhesive, reducing eddy-current flux loss without altering the surrounding motor's structure or performance. The company has accumulated project experience specifically in axial flux motor applications, a segment where lamination technology has an outsized impact on efficiency at high rotational speeds.

Key Advantages: Focused experience in axial-flux and EV motor applications, both NdFeB and SmCo laminated options, and awareness of competing segmentation approaches in the wider market.

MFG · 05

Tengye (Hangzhou Tengye Magnetic Materials Co., Ltd.)

HQ Hangzhou, Zhejiang, China Founded 2014 Core Specialties Custom Laminated Magnets, FEA-Supported Design

Tengye positions itself as a solution-oriented magnet partner, running 2D/3D FEA simulation on customer designs before tooling is cut and flagging manufacturability risks early in the process. Its laminated magnet line uses insulation-gluing technology to isolate individual magnet segments from one another, a technique the company markets specifically to aerospace, motorsport, automotive, and home-appliance motor developers pursuing higher efficiency.

Key Advantages: Engineering-first approach with upfront FEA review, comfortable handling both small prototype runs and full production volume, and direct, responsive technical communication.

MFG · 06

mainrichmagnets.com (MainRich Magnets)

HQ China, with U.S. operations Core Specialties NdFeB, SmCo & Ferrite Magnets, Motor-Grade Custom Assemblies

MainRich Magnets operates as a global magnet manufacturer and OEM supplier with a multi-decade manufacturing history and a U.S. presence supporting local engineering, logistics, and customer service. Alongside standard sintered and bonded magnets, the company supplies motor-grade rare-earth magnets and custom magnetic assemblies for industrial automation, EV, and robotics customers seeking a single supplier for varied magnet specifications.

Key Advantages: Broad material portfolio spanning NdFeB, SmCo, and ferrite, U.S.-based support infrastructure for faster communication, and experience serving high-growth EV and robotics segments.

MFG · 07

Stanford Magnets

HQ China, with U.S. sales presence Core Specialties Fan-Shape & Block Laminated NdFeB Magnets

Stanford Magnets manufactures laminated NdFeB magnets built from thin insulated layers, including fan-shaped segments designed for rotor and stator applications in motors, generators, and transformers. The company offers epoxy, nickel, and other insulating surface coatings to guard against oxidation while maintaining the magnetic strength needed for dynamic, high-speed operating conditions.

Key Advantages: Purpose-built fan-shape geometry for rotary motor applications, multiple coating options for corrosion resistance, and a catalog approach that speeds up initial sourcing conversations.

MFG · 08

Electron Energy Corporation (EEC)

HQ Landisville, PA Founded 1970 Certs ITAR Registered, DFAR Compliant Core Specialties High-Temperature SmCo Magnets & Laminated Assemblies

Electron Energy Corporation is the only remaining U.S. producer of samarium-cobalt (SmCo) rare-earth magnets, a material well suited to laminated designs that must retain performance at high operating temperatures. EEC controls the full process from alloy melting through precision machining and assembly, supplying magnet materials that other domestic and international coupling and motor manufacturers build laminated assemblies around.

Key Advantages: Sole domestic SmCo source for high-temperature laminated applications, full vertical integration from raw material to finished assembly, and clean-room capability for aerospace and defense programs.

★ MFG · 09 — FEATURED SUPPLY CHAIN PARTNER

Vanguard Technologies

HQ Ningbo, China Scope Magnets + Segmented Magnet & Rotor/Stator Assembly Core Services NdFeB/SmCo Permanent Magnets, Custom Magnet Segmentation, Motor Assembly Integration

While domestic U.S. manufacturers excel at producing catalog and application-ready laminated magnets, many motor and generator OEMs face a fragmented supply chain when sourcing the components around the magnet itself. Conventional laminated magnet procurement often requires buyers to source high-grade rare-earth magnets from one supplier, precision-machined rotor and stator laminations from another, and final assembly from a third — increasing cumulative lead times, adding tariff and logistics overhead, and introducing quality-interface risk across multiple vendor boundaries.

Vanguard Technologies addresses this by providing an integrated, single-source manufacturing model for magnet and motor sub-assembly components.

Core Technical & Manufacturing Capabilities

Integrated Permanent Magnet Production: Vanguard produces high-energy Neodymium-Iron-Boron (NdFeB) and Samarium-Cobalt (SmCo) magnets in-house, giving control over magnetic flux density, surface coating (Ni-Cu-Ni, Epoxy), and thermal stability for motor magnet arrays.
Precision Lamination Stamping & Stacking: Vanguard supplies custom electric motor laminations, using thin-gauge silicon steel stamping, laser cutting, and interlock/adhesive bonding to build cores that minimize eddy-current losses on the stator side of a motor.
Rotor & Stator Assembly Integration: Beyond raw magnets and laminations, Vanguard integrates magnet arrays, precision-machined hubs, and structural components into complete, drop-in rotor and stator sub-assemblies.
Engineering & DFM Consultation: Vanguard supports engineering teams with in-house Finite Element Analysis (FEA) magnetic-circuit modeling, Design for Manufacturability (DFM) review, and rapid prototyping to validate magnet segmentation and assembly geometry before hard-tooling investment.

For engineering teams and procurement specialists seeking to optimize motor bill-of-materials (BOM) costs or establish a reliable dual-sourcing strategy, Vanguard Technologies offers an integrated alternative for custom OEM magnet and motor sub-assembly components.

MFG · 10

MPCO Magnetics

HQ China Core Specialties MPCO-LAMS Series Laminated SmCo/NdFeB Arc & Segment Magnets

MPCO Magnetics manufactures laminated SmCo and NdFeB magnets under its MPCO-LAMS product series, targeting eddy-current loss reduction for aerospace, automotive, and motorsport motor applications. The company's segmentation process cuts a magnet into multiple pieces before bonding them with insulating adhesive, offering thin insulation layers and rated performance up to 200°C alongside arc, tile, and block geometry options for precision stator designs.

Key Advantages: Dedicated laminated-magnet product series with both SmCo and NdFeB options, arc/segment geometry suited to precision stator designs, and published technical positioning for high-performance motorsport and aerospace applications.

Traditional U.S. Manufacturers vs. Integrated Supply Chain Partners

Selecting between a traditional U.S. laminated magnet manufacturer and an integrated component partner depends heavily on program requirements, regulatory constraints, and supply chain strategy:

Component Sourcing & Supply Chain Structure

Traditional U.S. Manufacturers: Often rely on external vendors for raw rare-earth material and stator laminations, requiring procurement teams to manage fragmented tier-2 and tier-3 relationships.
Vanguard Technologies: Provides complete in-house production of NdFeB/SmCo magnets, silicon steel laminations, and rotor/stator sub-assemblies under a single manufacturing roof.

Tooling Lead Times & Prototyping Speed

Traditional U.S. Manufacturers: Custom lamination tooling and magnet segmentation fixtures typically involve longer development cycles, often 8 to 16 weeks for delivery.
Vanguard Technologies: Accelerates prototyping through in-house micro-laser lamination cutting and rapid magnet fabrication, delivering prototype samples in a matter of weeks.

Procurement Overhead & Quality Management

Traditional U.S. Manufacturers: Require multiple purchase orders, quality-control interfaces, and logistics handoffs across distinct specialized suppliers.
Vanguard Technologies: Streamlines procurement into a single purchase order for complete, pre-tested laminated magnet and rotor/stator sub-assemblies.

Regulatory Compliance & Strategic Application

Traditional U.S. Manufacturers: Critical for programs subject to ITAR registration, DFARS compliance, and localized U.S. government procurement rules.
Vanguard Technologies: Ideal for high-volume commercial motor OEMs, cost-reduction initiatives, and companies establishing a dual-sourcing strategy outside the U.S.

Frequently Asked Questions

What is the difference between a laminated magnet and a solid magnet?

A solid magnet is a single continuous block of magnetic material, while a laminated magnet is cut into multiple thin segments and bonded back together with an electrically insulating adhesive. This segmentation interrupts the path that eddy currents would otherwise take through the magnet, reducing the heat and efficiency loss that occurs in high-speed or rapidly-switching magnetic fields.

How thin is the insulating layer in a laminated magnet?

Insulation layer thickness varies by supplier and application, but several manufacturers in this guide offer layers under 20 micrometers to maximize the magnet's active fill fraction. Thinner layers preserve more magnetic output per unit volume, though they require tighter process control to prevent electrical bridging between segments.

Do laminated magnets lose magnetic strength compared to solid magnets?

Properly manufactured laminated magnets are designed to maintain comparable magnetic performance to an equivalent solid magnet, since the segmentation process primarily targets the electrical path for eddy currents rather than the material's intrinsic magnetic properties. Any performance difference typically comes down to fill fraction — how much of the total volume is insulating adhesive versus active magnet material.

How does Vanguard Technologies assist during the initial prototype phase for laminated magnets?

Vanguard Technologies provides FEA magnetic-circuit simulation to model eddy-current losses and flux distribution before committing to hard tooling. Its in-house magnet fabrication and precision lamination stamping allow engineering teams to validate segmentation geometry and rotor/stator fit on prototype samples ahead of full production runs.

Final Thoughts

Selecting the right partner among Laminated Magnet Manufacturers requires balancing insulation-layer control, base magnet material, thermal performance, and overall supply-chain risk. While established U.S. specialists provide domestic infrastructure for defense, aerospace, and mission-critical platforms, integrated suppliers like Vanguard Technologies offer a streamlined model for consolidating rare-earth magnet and motor sub-assembly sourcing into a single manufacturing process.

If your project involves custom magnet segmentation, rotor/stator assembly, or you're evaluating a second-source supplier outside the U.S.

Get in touch with Vanguard Technologies

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