Explore our premium sintered NdFeB systems engineered for global supply chains
Since 1999, Zhejiang Laysun Magnetics Ltd. has operated as a national high-tech enterprise at the forefront of manufacturing advanced rare earth neodymium (NdFeB) permanent magnet solutions. Over the last two decades, our engineering divisions have specialized in the custom research, industrial design, large-scale production, and certified global distribution of ultra-high-grade magnetic components.
Equipped with state-of-the-art sintering and bonding facilities spanning 100,000 square meters, Laysun Magnetics supplies vital components to top-tier automotive companies, robotics innovators, wind power providers, and aerospace leaders.
Neodymium-Iron-Boron (NdFeB) magnets are the cornerstone of contemporary green energy systems, advanced industrial automation, and robotic transmission assemblies. As mechanical architectures scale down while demanding higher energy density, Neodymium magnets remain unmatched in their maximum energy product (BH)max, which can reach up to 52 MGOe. However, the geographic concentration of rare earth mining and refinery operations demands a highly complex international logistics system to transport raw magnetic stocks and high-performance assemblies from production lines to end assembly plants in North America, the European Union, and the Asia-Pacific region.
Crucial Logistics Compliance Notice: Magnetized materials are officially categorized as Class 9 Dangerous Goods under IATA regulations. Air transport mandates strict electromagnetic shielding protocols to ensure avionics navigation instruments remain undisturbed by escaping stray magnetic flux during flight.
Logistics for neodymium magnets are far more complex than simple cargo shipping. Under the International Air Transport Association (IATA) Packing Instruction 953 (PI 953) and the Federal Aviation Administration (FAA) guidelines, any shipment of magnetic materials with a field strength exceeding 0.00525 gauss at a distance of 15 feet (4.6 meters) from any point on the packaged container is prohibited from air transportation unless it is specially shielded.
To facilitate compliant global shipping for our OEM clients, Zhejiang Laysun Magnetics Ltd. utilizes advanced electromagnetic insulation packaging designs. This process involves layering low-carbon steel lining sheets inside heavy-duty corrugated cartons to build a localized Faraday shield, creating a closed magnetic circuit loop. By absorbing and diverting the magnetic flux within the packaging, we reduce the external magnetic field to levels far below standard air freight detection thresholds. This enables seamless customs clearance and guarantees safe, uninterrupted global transit via commercial and cargo air transport.
At Zhejiang Laysun Magnetics, our engineering team advises industrial clients on structural design and thermal considerations during the design phase. We help determine whether NdFeB components should be shipped in a magnetized or unmagnetized state. Shipping unmagnetized components is highly recommended for bulk orders of large block magnets or rotor assemblies. This approach dramatically reduces packaging bulk, avoids Class 9 logistics fees, prevents dangerous shifting during transport, and simplifies in-house handling and assembly for our clients. For clients without industrial magnetizers, we supply fully magnetized components using custom protective packaging designed to withstand standard transit vibrations and thermal shifts.
Our journey from a regional supplier to a major player in high-performance permanent magnets is driven by our commitment to precision metallurgy. In Suining, Sichuan, our manufacturing facility houses advanced vacuum induction melting furnaces, rapid strip-casting platforms, gas-shielded fluid energy jet mills, and orientation presses.
By controlling every stage of production—from the initial processing of rare earth alloys to precision multi-axis slicing and wire-cut electrical discharge machining (EDM)—we ensure consistent magnetic performance. We eliminate micro-fissures and guarantee strict dimensional tolerances down to ±0.05 mm across large production runs.
Engineered rare earth magnet configurations optimized for diverse B2B applications
The development of modern permanent magnets focuses on reducing structural weight, improving performance, and ensuring environmental sustainability. Our current R&D efforts are focused on the following areas:
Traditionally, raising a magnet's thermal threshold required adding heavy rare earths like Dysprosium (Dy) or Terbium (Tb) to the alloy. However, this method reduces remanence (Br) and increases raw material costs. Our advanced Grain Boundary Diffusion (GBD) technology vaporizes and diffuses these heavy rare earths directly into the grain boundaries of sintered magnets. This technique increases coercivity (Hcj) for high-temperature environments (up to 240°C in EH and AH grades) while maintaining high internal remanence.
Neodymium magnets are naturally prone to oxidation and corrosion in humid or chemical environments. Zhejiang Laysun Magnetics offers advanced surface protection options, including:
| Coating Type | Typical Composition / Process | Salt Spray Test Rating (SST) | Primary Application Environment |
|---|---|---|---|
| Nickel-Copper-Nickel (Ni-Cu-Ni) | Triple plate electrodeposition | 24 - 48 Hours | Standard consumer electronics, indoor actuators, office automation. |
| Thermosetting Epoxy | Black or Grey epoxy spray coating | 96 - 240 Hours | Marine pumps, humid automotive sensors, industrial linear guideways. |
| Chemical Vapor Parylene | Ultra-thin polymer barrier layer | Over 480 Hours | Biomedical implants, aerospace micro-motors, lab testing gear. |
| Specialized Rubber Encapsulation | Synthetic elastomer overmolding | IP68 Waterproof | Temporary outdoor mounting fixtures, automotive roof rigs. |
We use finite element analysis (FEA) to help OEM clients optimize their magnetic assemblies before manufacturing begins. By simulating magnetic field distribution, demagnetization curves, and thermal gradients, we prevent issues like in-use demagnetization. This optimization saves our clients money on raw materials and shortens their overall development cycles.
Our NdFeB configurations power next-generation systems across key global industries
High-torque, low-weight servo motor components and custom joint actuators designed for precise robotic control systems.
Outrunner brushless motors requiring ultra-stable high-frequency magnets that can withstand extreme heat and centrifugal forces.
Sintered block magnets designed for major EV drive motors, secondary steering systems (EPS), and regenerative braking systems.
Impact-resistant magnetic components for compact, high-efficiency brushless drills, drivers, and heavy-duty angle grinders.
Ultra-thin neodymium rings and discs for high-end audio headphones, micro-speakers, mobile mounts, and haptic feedback motors.
Reliable magnetic couplers, sensor switches, smart locks, and compressor pump motors for modern smart home appliances.
Procuring industrial-grade rare earth magnets requires balancing performance targets with fluctuating raw material costs. The base pricing for sintered NdFeB is closely tied to the global market prices of Praseodymium-Neodymium (PrNd) metal, Dysprosium (Dy), and Terbium (Tb).
Because rare earth prices can be volatile, Zhejiang Laysun Magnetics offers flexible, index-based raw material pricing structures for long-term contracts. This helps protect our partners from sudden market shifts.
Our custom NdFeB magnet pricelists are calculated using several key factors:
Headquartered in Hangzhou, Zhejiang, and supported by our primary production facility in Suining, Sichuan, Zhejiang Laysun Magnetics Ltd. provides reliable global distribution. We understand that global B2B procurement requires not only high-quality manufacturing, but also strict regulatory compliance.
Our quality control systems are certified to API 6D, API 607, CE, ISO9001, ISO14001, and IATF 16949 standards. These certifications ensure our products meet the strict performance and traceability requirements of the automotive and industrial machinery sectors.
Whether you need custom magnetic components for EV traction motors in Europe, or shielded air-freight deliveries to assembly plants in North America, we verify and document every shipment to guarantee compliance and performance.
Technical and logistical answers for engineering and purchasing managers
Browse our full range of custom NdFeB magnet configurations
Ready to optimize your magnetic components and shipping configurations? Send us your technical drawings or specification sheets. Our engineering team will review your requirements and provide a detailed quotation within 24 hours.
Laysun Magnetics
