Explore our engineering capabilities through our primary product line, supporting advanced automotive, electric, and consumer hardware designs.
A globally trusted manufacturer of industrial-grade rare earth magnets since 1999.
Founded at the turn of the millennium, Zhejiang Laysun Magnetics Ltd. has rapidly evolved from a visionary startup to a national high-tech industry pacesetter. Our state-of-the-art manufacturing facility, sprawling across 100,000 square meters in Sichuan, functions as the central hub of our advanced material operations.
By coupling lean manufacturing methodologies with state-of-the-art scientific processing, our facility handles the complex smelting, sintering, machining, and coating operations required to output over 5,000 tons of high-coercivity rare earth magnets annually. We support critical hardware systems globally, from EV traction motors to hyper-precise voice coil actuators.
How our high-power Neodymium Block and Square Magnets provide vital magnetic flux density across mission-critical sectors.
Modern Electric Power Steering (EPS) and drivetrain assemblies rely on high-grade NdFeB magnets that offer high flux stability at elevated operational temperatures. Our custom block profiles guarantee zero-defect motor performance and linear torque outputs.
Precision brushless DC (BLDC) motors in robotic joints require tight geometric tolerances and high volumetric energy density. Sintered NdFeB square magnets provide the intense magnetic holding forces and precise magnetic field alignments required for high-accuracy operations.
For clean energy conversion, Laysun produces massive blocks with robust environmental protections. Our high-coercivity materials are designed to resist thermal and magnetic degradation over multi-decade cycles in marine and desert wind farms.
Observe our automated pressing, sintering, and testing lines delivering continuous magnetic consistency.
Our raw alloy elements are melted under vacuum inside high-capacity induction furnaces. The resulting molten material is rapidly cooled via strip-casting, forming thin, high-homogeneity alloy flakes. These flakes undergo fine pulverization using high-velocity fluid-bed jet milling, creating micro-sized powders that are systematically aligned and cold-pressed within robust hydraulic systems under controlled gas environments.
This strict structural preparation underpins Zhejiang Laysun Magnetics' industry-leading performance. Utilizing computerized, high-temperature vacuum sintering ovens, we refine the structural density of the green compacts to maximize operational stability.
Understanding Sintered NdFeB (Neodymium Iron Boron) physical and magnetic property limits.
Square and block neodymium magnets are characterized by their Maximum Energy Product, $(BH)_{max}$, expressed in Mega-Gauss Oersteds (MGOe). Our manufacturing facility routinely outputs grades starting from standard N35 up to ultra-high-grade N52. When high operational temperatures are expected, such as in high-performance traction motors, we formulate grades with elevated thermal stability:
Typical performance metrics across standard NdFeB grades manufactured by Zhejiang Laysun Magnetics:
| Grade | Br (kGs) | Hcj (kOe) | (BH)max (MGOe) |
|---|---|---|---|
| N35 | 11.7 - 12.1 | ≥ 12.0 | 33 - 36 |
| N42SH | 12.8 - 13.2 | ≥ 20.0 | 40 - 43 |
| N48UH | 13.7 - 14.3 | ≥ 25.0 | 45 - 48 |
| N52 | 14.3 - 14.8 | ≥ 11.0 | 50 - 53 |
Our permanent rare earth components are utilized across a wide variety of industrial fields.
We believe in maintaining reliable production operations.浙江兰晟磁业 (Zhejiang Laysun Magnetics Ltd.) utilizes a comprehensive quality management system that ensures strict tracing and performance validation from raw material input to final output dispatch.
Our testing labs are fully equipped with state-of-the-art instruments, including glow discharge spectrometers, helium mass spectrometers for leak detection, environmental stress chambers, and auto-sorting systems to guarantee zero defects.
API 6D, API 607, CE, ISO9001:2015, ISO14001:2015, and ISO45001. We strictly align with EU RoHS/REACH and TS standards to support reliable product integrations.
How we protect highly reactive rare earth matrices from atmospheric and environmental oxidation.
Unprotected NdFeB matrices are highly vulnerable to corrosion, which can lead to structural failure. To ensure long-term stability, we apply specialized protective coatings tailored to specific operating environments:
Our engineering roadmap focuses on reducing dependency on heavy rare earth elements (Dy/Tb) by adopting advanced Grain Boundary Diffusion (GBD) technology. This approach allows us to produce high-coercivity magnets with lower material costs, offering a more stable and sustainable supply chain for our global partners.
Get answers to common technical, design, and purchasing questions from our engineering team.
A1: Square and block magnets feature flat, uniform surfaces that allow for secure mechanical fastening and alignment. They produce linear magnetic fields that are well-suited for sensor arrays, linear actuators, and slot-in motor rotors. Their design also facilitates simple assembly within slot configurations compared to curved disc or arc magnets.
A2: Sintering causes material shrinkage. To achieve tight tolerances, we use precision wire cutting (EDM) and automated grinding. Our standard tolerance is ±0.05 mm, with capabilities down to ±0.02 mm for demanding aerospace or electronic applications.
A3: The performance of NdFeB magnets decreases as operating temperatures rise. If the temperature exceeds the material's maximum operational threshold (defined by its grade), it can trigger irreversible demagnetization. We help clients select the appropriate grade (H, SH, UH, EH, or AH) to ensure stable magnetic field density under the expected thermal load.
A4: Tooling and sample production typically require 10 to 15 days, while full-scale production runs take 20 to 25 days depending on the volume and custom specifications. We offer air freight options for urgent requirements and seafreight solutions for larger bulk deliveries.
A5: We secure stable pricing and supply by sourcing raw materials directly from established mining partners. Additionally, our 5,000-ton annual capacity allows us to manage inventory buffers, cushioning our clients against sudden market fluctuations.
Submit your specifications, drawings, or grade requirements. Our engineering team will provide a detailed quote within 24 hours.
Request Custom QuoteExplore our wider range of permanent rare earth magnets and specialized assemblies.
Laysun Magnetics