Explore our engineering-grade custom magnetic assemblies designed for precision efficiency and superior structural durability.
Modern industrial design is constantly pushing the limits of power density, thermal efficiency, and dimensional constraints. Zhejiang Laysun Magnetics Ltd. stands at the intersection of material science and precision manufacturing. As a premier Chinese developer established in 1999, we translate raw rare-earth materials into highly specialized metallurgical solutions. Sintered Neodymium-Iron-Boron (NdFeB) technologies, often termed "Titan" magnets due to their extreme BHmax (Maximum Energy Product), serve as the foundational backbone for high-performance applications globally.
Our engineering capabilities enable us to produce custom magnetic alloys tailored to survive hostile environments. By adjusting the concentration of Dysprosium (Dy) and Terbium (Tb) through cutting-edge Grain Boundary Diffusion (GBD) processes, we elevate the intrinsic coercivity (Hcj) of our magnets. This process provides thermal stability up to 240°C while minimizing reliance on volatile heavy rare-earth elements, aligning with the industry's demand for cost-stable and reliable supplies.
Deploying specialized magnetic arrays across highly demanding global industries, supporting the shift to high-efficiency electrification.
The automotive shift toward Electric Vehicles (EVs) demands high-temperature reliability. Our sintered NdFeB blocks and segments are engineered directly into traction motor rotors and Electric Power Steering (EPS) assemblies, guaranteeing zero-degradation performance across hundreds of thousands of duty cycles.
Weight-to-torque efficiency is the primary metric in robotic joint design and aerospace actuation systems. By leveraging precise geometric tolerances (down to +/- 0.02mm) and high residual induction (Br), we supply lightweight magnetic components that maximize rotational torque in servo motors.
For electronic devices and automated pick-and-place arrays, Voice Coil Motors (VCM) demand incredibly uniform magnetic fields. Our specialized thin-walled ring and arc segments ensure linear response characteristics and lightning-fast actuation speeds in micro-positioning hardware.
In modern industrial applications, selecting a rare-earth magnet involves matching performance characteristics with environmental conditions. NdFeB is highly susceptible to temperature-induced demagnetization and corrosion if left unprotected. At Zhejiang Laysun Magnetics, we manage this through chemical customization and specialized coatings.
Our standard manufacturing portfolio spans N35 to N55 grades for general-purpose environments, extending through the M, H, SH, UH, EH, and AH series for higher operating temperatures. The AH series, for instance, maintains coercive force under high-temperature stresses, operating efficiently up to 240°C. This stability prevents thermal runaway in high-speed generator rotors and industrial drivetrains.
| Material Class | Remanence (Br) - T | Intrinsic Coercivity (Hcj) - kA/m | Max Energy Product (BH max) - kJ/m³ | Max Temp Limit (°C) |
|---|---|---|---|---|
| N52 (Standard) | 1.42 - 1.47 | ≥ 875 | 398 - 422 | 80°C |
| N45H (High Temp) | 1.32 - 1.38 | ≥ 1353 | 342 - 366 | 120°C |
| N42SH (Super High) | 1.28 - 1.32 | ≥ 1592 | 318 - 342 | 150°C |
| N38UH (Ultra High) | 1.22 - 1.26 | ≥ 1990 | 287 - 310 | 180°C |
| N35EH (Extremely High) | 1.17 - 1.22 | ≥ 2387 | 263 - 287 | 200°C |
| N33AH (Absolute High) | 1.13 - 1.17 | ≥ 2626 | 247 - 271 | 240°C |
To shield the core NdFeB matrix from oxidation, we apply multi-layer electroplating processes. Depending on your operational requirements, we offer standard Ni-Cu-Ni (Nickel-Copper-Nickel), high-durability Epoxy resins, chemical-resistant Parylene, Zinc (Zn) passivation, and specialized vulcanized rubber overmolding. The rubber-coated designs are suited for marine deployments or outdoor structural fixtures where physical impacts and moisture are constant concerns.
Zhejiang Laysun Magnetics Ltd. was established in 1999, at a time when global demand for high-strength permanent magnets began to accelerate. Over the past 25 years, we have transitioned from a localized factory into a national high-tech manufacturing enterprise. Today, our main production center spans over 100,000 square meters in Sichuan, optimized for high-volume automated production of sintered NdFeB.
We believe that sustained leadership relies on consistent reinvestment in technological infrastructure. Our facility houses advanced vacuum induction melting furnaces, inert-gas jet mills, automated transverse-field presses, and high-vacuum sintering chambers. Supported by 300 experienced professionals, we maintain a robust annual output of 5,000 tons, allowing us to manage large-scale global demands without compromising precision or lead times.
Our permanent rare-earth solutions conform to international regulatory and quality frameworks, ensuring seamless integration into global supply chains. We maintain a comprehensive quality management system certified under ISO 9001 and ISO 14001, alongside adherence to IATF 16949 standards for automotive product safety and reliability.
For specialized industrial applications, including heavy piping, valves, and actuation, Laysun Magnetics products align with API 6D and API 607 fire-safe design specifications. Additionally, all materials undergo regular testing to guarantee compliance with REACH and RoHS standards, protecting end-user safety and environmental health across the European and American markets.
To reduce dependance on volatile heavy rare earth elements (HREEs) like Dysprosium and Terbium, our R&D team has prioritized Grain Boundary Diffusion (GBD) technology. Unlike traditional bulk alloying methods where heavy elements are mixed uniformly throughout the material, GBD targets only the outer boundaries of the NdFeB grains.
This localized enrichment achieves equivalent thermal performance and resistance to demagnetization while using up to 70% less Dy/Tb. The result is a more resource-efficient manufacturing cycle, offering more stable pricing structures for long-term supply contracts. Our roadmap includes expanding GBD processes to N55-grade magnets, aiming to unlock higher flux densities for next-generation drone motors and aerospace actuators.
Find answers to technical, mechanical, and logistical questions regarding rare earth magnets.
Browse our catalog of custom-engineered designs tailored for electric drive motors, precision instruments, and structural fixtures.
Whether you require custom dimensions, specialized coatings, or high-temperature grades, our engineering team will provide a tailored quote and feasibility report within 24 hours.
Laysun Magnetics
