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In the modern industrial paradigm, the transition toward miniaturization, energy conservation, and system integration has placed unprecedented demand on micro-sized magnetic materials. Small permanent magnets—primarily processed from Sintered Neodymium-Iron-Boron (NdFeB) matrices—constitute the backbone of advanced magnetic actuators, high-torque micro-motors, and high-frequency sensor suites.
As a leading national high-tech enterprise established in 1999, Zhejiang Laysun Magnetics Ltd. specializes in engineering high-coercivity (Hcj), high-remanence (Br) permanent magnet configurations that survive challenging operating dynamics. This documentation analyzes the metallurgical processes, material grade allocations, structural coating protocols, and global application architectures dictating modern magnetic manufacturing.
Video: Direct insights from our 100,000 square meter integrated industrial magnet processing plant.
Delivering precision-configured magnetic field gradients for next-generation technology domains.
Drone outrunner motors and gimbal stabilizers require dynamic, lightweight motors. We manufacture high-coercivity micro arc and block NdFeB elements that maximize air gap flux without inflating weight profiles, guaranteeing thermal ceiling resistance under sustained aerodynamic stress.
Within electric drivetrains and Electronic Power Steering (EPS) units, reliability is paramount. Our custom radial ring magnets and multi-pole bonded NdFeB rings support continuous angle-sensing feedback and reliable high-torque transmission, operating within high ambient thermal regimes.
Industrial cobots and automated guided vehicles (AGVs) demand high precision in servo-motors. Utilizing Grain Boundary Diffusion (GBD) technology, we design segmented arc and wedge magnets that eliminate cogging torque, enabling smooth positional execution down to sub-arcsecond parameters.
Brushless impact wrenches, grinders, and hammer drills count on highly concentrated torque. Sintered NdFeB blocks with multi-layered nickel coatings protect the inner magnetic core against extreme mechanical vibration, ensuring motor torque density remains uncompromised.
From Voice Coil Motors (VCM) in smartphone camera autofocus setups to MagSafe charging ring matrices, Laysun Magnetics offers custom micro-magnets. Our processing lines can handle ultrathin dimensional profiles (down to 0.2mm) with consistent flux fields.
Modern smart appliances lean heavily on quiet, energy-saving inverter compressors and circulating pumps. By implementing radial multi-pole rings and highly anti-corrosive epoxy treatments, we secure magnet lifespan benchmarks exceeding fifteen years of continuous service.
Comprehensive metallurgical physical characteristics of Sintered NdFeB permanent magnets.
| Class Group | Material Grade | Remanence (Br) - T | Remanence (Br) - kGs | Coercivity (Hcb) - kA/m | Intrinsic Coercivity (Hcj) - kA/m | Max Energy Product (BH)max | Max Temp Limit (°C) |
|---|---|---|---|---|---|---|---|
| N Grade | N52 | 1.42 - 1.47 | 14.2 - 14.7 | ≥ 828 | ≥ 955 | 398 - 422 kJ/m³ | 80 |
| M Grade | N50M | 1.40 - 1.45 | 14.0 - 14.5 | ≥ 828 | ≥ 1114 | 382 - 406 kJ/m³ | 100 |
| H Grade | N48H | 1.37 - 1.43 | 13.7 - 14.3 | ≥ 828 | ≥ 1353 | 366 - 390 kJ/m³ | 120 |
| SH Grade | N45SH | 1.32 - 1.38 | 13.2 - 13.8 | ≥ 828 | ≥ 1592 | 342 - 366 kJ/m³ | 150 |
| UH Grade | N40UH | 1.24 - 1.28 | 12.4 - 12.8 | ≥ 828 | ≥ 1989 | 302 - 326 kJ/m³ | 180 |
| EH Grade | N38EH | 1.20 - 1.25 | 12.0 - 12.5 | ≥ 828 | ≥ 2387 | 286 - 310 kJ/m³ | 200 |
| AH Grade | N35AH | 1.17 - 1.22 | 11.7 - 12.2 | ≥ 828 | ≥ 2785 | 263 - 286 kJ/m³ | 230 |
The production of custom small permanent magnets requires strict controls over chemical composition and microstructure. At Zhejiang Laysun Magnetics, we implement a multi-stage closed-loop quality structure:
Following vacuum sintering, the raw magnet blocks undergo precision slicing, double-disc grinding, and wire-cut electrical discharge machining (EDM) to achieve sub-millimeter tolerances.
Addressing supply chain volatility, quality consistency, and engineering support for global buyers.
Fluctuations in rare earth oxide prices (PrNd, DyFe, Tb) pose challenges for long-term contract pricing. Zhejiang Laysun Magnetics manages a vertically aligned raw material reserve, allowing us to offer stable, multi-month price agreements and protect project margins for key automotive and industrial partners.
Small NdFeB magnets are highly prone to corrosion. We provide multiple advanced surface finishes, including multi-layer electrolytic Ni-Cu-Ni, black epoxy resins, Chemical Vapor Deposition (CVD) parylene, and high-performance rubber encapsulation, achieving Salt Spray Test (SST) resistance up to 720 hours.
Every custom magnet batch undergoes 3D coordinate scanning, magnetic flux density testing, Hysteresisgraph B-H curve validation, and automated optical sorting. Our systems verify geometric parameters down to ±0.005mm and magnetic angle deviation within ±1.5°.
Zhejiang Laysun Magnetics operates under structured quality frameworks to support highly regulated industries. Our operations comply with aerospace, automotive, and medical device standards.
Our plants are certified under ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and CE standards. We supply API 6D, API 607, and TS-certified components to demanding industrial accounts worldwide.
All rare earth raw materials undergo comprehensive screening to ensure compliance with REACH, RoHS, and conflict mineral regulations. This documentation is available for custom configurations to simplify import and product validation processes.
ISO 9001 Cert
ISO 14001 Cert
Quality Management
Headquartered in Hangzhou, Zhejiang, and backed by our specialized 100,000 m² rare earth processing center in Suining, Sichuan, Laysun Magnetics is positioned to serve international OEMs.
Small permanent magnets shipped by air must comply with IATA packing instruction 953. Our packaging team provides customized magnetic shielding boxes to ensure zero magnetic field leakage at the box exterior, allowing hassle-free clearance through international customs.
Through our partnerships with major global freight networks, we provide flexible delivery terms (FOB, CIF, DDP) and local warehousing solutions to support JIT (Just-In-Time) inventory requirements.
Expert answers addressing the physics, mechanical processing, and logistics of ordering custom rare earth magnets.
Explore specialized NdFeB shapes, block assemblies, and pot-magnet structures.
Our engineering team responds to all custom configuration requests, technical parameter verifications, and pricing inquiries within 24 hours. Submit your design specifications to connect with an applications engineer.
Laysun Magnetics
