Explore our elite range of customized NdFeB systems, engineered to maintain precise magnetic moments and optimized magnetization profiles.
Your Trusted National High-Tech Partner for Advanced Rare Earth Magnets Since 1999
Founded at the turn of the millennium in 1999, Zhejiang Laysun Magnetics Ltd. has evolved from a pioneering visionary startup into a national high-tech manufacturing pacesetter. Operating a sprawling, state-of-the-art 100,000 square meter factory in Suining, Sichuan, and supported by corporate offices in Hangzhou, we fuse geographical material advantages with world-class engineering capability.
We specialize in the research, production, and distribution of high-performance sintered NdFeB (Neodymium Iron Boron) magnets. Our solutions are integral to high-stakes applications including electric vehicles (EVs), industrial high-efficiency motors, consumer electronics, and renewable energy wind turbines, where maintaining a precise magnetic moment and stable magnetization is critical.
An engineering dive into how Laysun Magnetics ensures ultra-tight tolerances for industrial applications.
In modern electrical engineering, selecting a magnet is no longer just about specifying physical dimensions and nominal remanence ($B_r$). High-precision assemblies—such as Electric Power Steering (EPS) motors, Voice Coil Motors (VCM), and aerospace sensors—require strict control over the magnet's magnetic moment ($m$, measured in $A\cdot m^2$ or $G\cdot cm^3$) and its magnetization vector ($M$, magnetic moment per unit volume).
At Zhejiang Laysun Magnetics, we implement advanced material testing methods to confirm the vector alignment of magnetization. Any misalignment, commonly referred to as the magnetic angle deviation (inclination or declination angle error), can lead to rotational cogging torque in electric motors, output signal deviation in Hall sensors, and systemic inefficiency.
A material's bulk magnetization is defined mathematically as:
M = m / V
Where $m$ represents the total magnetic moment vector and $V$ is the active volume of the permanent magnet. To ensure our clients receive components with predictable performance profiles, we employ two primary testing methodologies:
A typical high-energy NdFeB magnet might have excellent surface gauss reading, but if its magnetization axis is skewed by even $1.5^\circ$, the performance of a high-speed rotor drops exponentially.
Laysun's manufacturing process guarantees an angle deviation of less than $1.0^\circ$ (with option to limit to $0.5^\circ$ for aerospace applications) through optimized orientation presses during the powder metallurgy stage. By using precise hydraulic press controls and specialized electromagnetic alignment coils, we secure the anisotropic structure before sintering.
How our manufacturing footprint in Sichuan and Zhejiang guarantees reliability, quality, and competitive advantages.
Our factory is strategically located in Sichuan, a powerhouse region for rare earth extraction and separation. This location guarantees an uninterrupted supply of raw PrNd (Praseodymium-Neodymium), Dysprosium (Dy), and Terbium (Tb), shielding our customers from international supply shocks.
With multi-wire slicing machines, double-disc grinding units, and automated plating lines (Ni-Cu-Ni, Epoxy, Zn, Everlube), we achieve dimensional tolerances down to ±0.03mm. This guarantees that calculated magnetic moments remain highly consistent across batches.
Our labs are fully equipped with Demagnetizing Curve Tracers, HAST (Highly Accelerated Stress Test) chambers, PCT (Pressure Cooker Test) apparatuses, and Salt Spray Testing rigs to confirm anti-corrosion layer viability and thermal stability.
Deploying advanced NdFeB magnetics across critical global technologies.
Traction motors in hybrid and electric vehicles (EVs) demand magnets with high intrinsic coercivity ($H_{cj}$) and thermal stability to resist demagnetization under heavy loads. Laysun NdFeB block magnets utilize Grain Boundary Diffusion (GBD) technology. This technique reduces heavy rare earth (Dy/Tb) consumption while maintaining high magnetic moments up to 180°C operating environments.
Robotic joints rely on precise servo motor control. The magnetic moment stability of our ring magnets ensures linear torque output, avoiding micro-stuttering during operation. In unmanned aerial vehicles (UAVs), high power-to-weight ratios are achieved using our ultra-lightweight arc segments with maximized saturation magnetization.
High precision assemblies tailored for specialized operations.
Strict compliance, traceability, and material safety to protect your global supply chain.
For Tier-1 automotive and industrial OEMs, traceability is mandatory. Zhejiang Laysun Magnetics operates under rigorous international quality frameworks. Our production processes conform to ISO 9001 and ISO 14001 guidelines, and we support testing reports for API 6D, API 607, CE, and IATF 16949 requirements.
Every shipping batch is accompanied by raw material melt logs, demagnetization curve sheets (displaying Remanence $B_r$, Coercivity $H_{cb}$, Intrinsic Coercivity $H_{cj}$, and Maximum Energy Product $(BH)_{max}$), and dimensional inspection metrics.
API 6D, API 607, CE, ISO9001, ISO14001, ISO18001, TS (Available upon request).
Developing cutting-edge magnetic pathways for clean energy and smart systems.
Our journey is marked by constant adaptation. As wind turbines scale to multi-megawatt capacities and EV drivetrains shift to higher voltages, we innovate in response. We are actively researching heavy-rare-earth-free magnets for light-load applications and optimizing GBD processes for heavy-duty applications.
Our R&D team collaborates with key metallurgy laboratories in Western China to analyze crystal grain refinement. This ensures that the bulk magnetic moment of our sintered NdFeB exhibits excellent resilience under thermal stresses up to 220°C.
Answers to crucial technical queries for procurement and design engineers.
Submit your specifications (dimensions, grade, coating, target magnetic moment) and our engineering team will respond within 24 hours.
Explore additional variations of our rare earth magnets, custom-tailored for global OEMs and industrial distributors.
Laysun Magnetics
