High-performance permanent magnets customized to meet the demanding requirements of Korean industrial engineering, machinery, and retrieval systems.
Since 1999, we have established our position as a high-tech rare earth magnet manufacturing powerhouse, serving global Tier-1 companies and Korean industries.
Founded at the turn of the millennium in 1999, Zhejiang Laysun Magnetics Ltd. has evolved from a pioneering visionary into an industry pacesetter in the field of rare earth permanent magnets and custom magnetic assemblies. Our vast manufacturing complex, encompassing over 100,000 square meters of production area, operates with advanced automated sintering furnaces, high-precision slicing tools, and advanced surface coating lines.
Specializing in the development, research, production, and sales of high-performance rare earth NdFeB magnets, we cater to a diverse range of applications. Our magnets are integral to various sectors, including electric vehicles (EVs), industrial automation, smart robotics, power tools, and consumer electronics, significantly enhancing operational efficiency and reliability.
Unlocking competitive advantages in South Korea's highly competitive tech-corridors through precision magnetic engineering.
South Korea’s industrial sector stands as one of the world's most sophisticated hubs for technology and manufacturing. Driven by conglomerates in Seoul, Suwon, Ulsan, and Daejeon, the Korean market demands top-tier performance for magnet assemblies. From high-speed electric vehicle traction motors to precision semiconductor robotic pick-and-place lines, the technical tolerances required are highly rigorous.
As a premier magnet assembly factory and supplier for the Korea market, Zhejiang Laysun Magnetics Ltd. provides the critical technological advantage Korean engineers require: high remanence ($B_r$), outstanding thermal stability, and low weight. With Korea’s strategic transition toward eco-friendly mobility and Smart Factory architectures, our customized sintered Neodymium-Iron-Boron (NdFeB) magnet assemblies serve as a cornerstone of performance optimization.
High-coercivity NdFeB assemblies designed for steering assist motors (EPS) and traction motors, offering stable performance up to 220°C.
Multi-pole ring magnets and complex rotor assemblies optimized for high-speed robotic joints and servo-mechanism controllers.
Full engineering support, providing Halbach arrays, high-speed balancing, and advanced simulation for next-gen magnetic layouts.
Standardized magnet properties and chemical coatings customized to perform in harsh, humid, and high-temp environments.
In precision assemblies, magnetic stability determines the operational life of the final motor or sensor. We implement Grain Boundary Diffusion (GBD), diffusing Dysprosium (Dy) or Terbium (Tb) directly into the magnet's crystal interfaces. This method maintains high coercivity without lowering the remanence, reducing reliance on heavy rare earths and stabilizing raw material pricing.
| Material Grade | Remanence (Br) / kGs | Coercivity (Hcb) / kOe | Intrinsic Coercivity (Hcj) / kOe | Max Energy Product (BH)max | Max Working Temp / °C |
|---|---|---|---|---|---|
| N52 | 14.3 - 14.8 | ≥ 10.5 | ≥ 11.0 | 50 - 53 MGOe | 80 |
| N45SH | 13.2 - 13.8 | ≥ 12.0 | ≥ 20.0 | 43 - 46 MGOe | 150 |
| N40UH | 12.5 - 13.0 | ≥ 11.8 | ≥ 25.0 | 38 - 41 MGOe | 180 |
| N38EH | 12.0 - 12.5 | ≥ 11.3 | ≥ 30.0 | 36 - 39 MGOe | 200 |
| N35AH | 11.7 - 12.2 | ≥ 11.0 | ≥ 33.0 | 33 - 36 MGOe | 220 |
*Note: Custom geometries, specialized multi-pole ring magnetization patterns, and specific coatings (Epoxy, Ni-Cu-Ni, Everlube, Zinc, Chemical Vapor Deposition) are engineered to prevent oxidation in high-humidity offshore or industrial settings.
From custom rotors to raw block magnets, explore the diverse range of sintered Neodymium components supplied worldwide.
Standardized testing protocols and material audits designed to keep supply chains uninterrupted.
To integrate into international automotive and consumer electronics pipelines, Zhejiang Laysun Magnetics Ltd. maintains structural certifications across our facilities. We verify our material compositions using GD-MS spectrometers, high-temperature environmental testing chambers, and industrial salt-spray corrosion devices to test and confirm batch consistency.
Our quality policy centers on continuous tracking from rare earth mining oxides to the packaged magnetic assembly. Every shipment to Busan, Incheon, or Ulsan contains full batch chemical mapping and physical flux tests.
Tailored engineering for precision applications, matching structural requirements with optimal magnetic configurations.
Explore additional industrial magnet solutions, all built and coated in our certified high-performance factory lines.
Answers to technical, logistics, and quality assurance questions common to Korean procurement and design engineers.
For standardized designs, manufacturing takes between 15 to 20 days. Custom configurations requiring dedicated tooling, specific jigs, or challenging multi-pole magnetization (such as custom motor rotors or Halbach arrays) typically take 25 to 35 days. Shipments are processed via Ningbo/Shanghai ports, with direct transit to Busan or Incheon ports taking only 2 to 4 days, ensuring efficient supply chain integration.
We follow strict APQP (Advanced Product Quality Planning) and PPAP (Production Part Approval Process) level 3 protocols. Every batch of automotive-grade magnets (such as EPS rotors or electric drivetrain magnets) undergoes non-destructive testing, optical scanning for dimension verification, and flux-gate measurement. This guarantees zero defects prior to export to South Korea.
Yes. We possess high-precision carbon-fiber wrapping and stainless-steel sleeving capabilities for motor rotors. Our engineering department uses advanced electromagnetic design software to simulate flux distributions, helping Korean R&D teams optimize motor efficiency and minimize cogging torque.
Neodymium magnets naturally oxidize if left unprotected. We offer advanced surface modifications including multi-layer electroplating (Ni-Cu-Ni), high-adhesion epoxy, autoclave-tested passivation, and customized molded rubber vulcanization. For harsh marine or humid environments in Korean coastal industrial hubs, we recommend our specialized epoxy coating or rubber encapsulation, which endure up to 1000 hours of continuous salt-spray testing.
Get in touch with our engineering team for technical design reviews, 3D modeling assistance, and customized pricing quotes. Receive support within 24 hours.
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Laysun Magnetics
