Engineered to exact magnetic tolerances, offering high remanence, coercivity, and thermal stability.
Sintered Neodymium-Iron-Boron (NdFeB) magnets stand as the pinnacle of modern magnetics, delivering unparalleled magnetic field density per unit volume. As a premier global manufacturer, Zhejiang Laysun Magnetics Ltd. engineers custom magnetic solutions tailored for extreme operational reliability.
By leveraging advanced grain boundary diffusion (GBD) technology, we optimize the usage of heavy rare earths such as Dysprosium (Dy) and Terbium (Tb). This strategic engineering reduces dependance on volatile raw materials while boosting coercivity, enabling our magnets to perform at temperatures up to 200°C without irreversible demagnetization.
Selecting the correct magnet grade is critical for industrial applications. Our technical team works directly with client engineers to balance parameters like energy product (BH)max, operating environment, and mechanical stress profile:
Founded at the turn of the millennium in 1999, Zhejiang Laysun Magnetics Ltd. has evolved from a targeted technical workshop into a massive high-tech enterprise. Our modern production complexes are optimized to output 5,000 tons of high-grade permanent magnets annually, catering to demands across North America, the EU, and East Asia.
Headquartered in Hangzhou, Zhejiang, and leveraging a vast production footprint in Sichuan, we bridge the gap between rare earth mining regions and tech hubs. This geographic advantage ensures raw material supply security, direct oversight of chemical composition, and structural stability in our pricing.
We believe that high-performance engineering requires more than machinery; it demands a cultural alignment toward excellence:
Why Tier-1 global industrial companies rely on Chinese manufacturing ecosystems for their magnetic components.
China refines over 80% of the world's rare earth elements. As an established manufacturer, Zhejiang Laysun Magnetics enjoys direct access to raw Neodymium and Dysprosium oxides, mitigating supply bottlenecks and ensuring price stability for multi-year contracts.
Spanning a massive 100,000 m² factory area, our manufacturing floors utilize semi-automated vacuum induction melting (VIM) furnaces, jet milling systems, and high-capacity isostatic presses. We easily scale up production from custom prototyping batches to multi-ton industrial campaigns.
Our environmental and plating facilities offer high-corrosion-resistant coatings including Ni-Cu-Ni, heavy zinc electroplating, epoxy resins, and advanced parylene. These treatments withstand up to 1000 hours of Salt Spray Testing (SST), ensuring long-term durability.
From micro-electronics to heavy power generation, our custom NdFeB solutions drive global engineering innovations.
High-torque, low-weight servo motors require NdFeB magnets with high energy density (BH)max to guarantee instantaneous acceleration and high precision position tracking.
Our ultra-light custom segment and ring magnets optimize the efficiency of brushless DC motors (BLDC), allowing longer flight endurances and higher payload capabilities.
We supply automotive tier-1 suppliers with sintered NdFeB blocks with high thermal grades (UH, EH, AH) that maintain high coercive force under intense temperatures.
Brushless motors in modern industrial power tools rely on our NdFeB magnets to achieve high RPM, high torque, and excellent mechanical resistance to vibration.
Miniature voice coil motors (VCM), smartphone speakers, and laptop drives utilize our ultra-thin neodymium discs and rings to maximize acoustic and sensory outputs.
Compressors in variable-frequency air conditioners and high-efficiency washing machine motors utilize our magnets to reduce carbon footprints and energy losses.
Large-scale direct-drive wind generators require massive quantities of heavy NdFeB arc segments. Zhejiang Laysun's high consistency and bulk-scale production ensure minimal maintenance costs for offshore and onshore platforms.
Zhejiang Laysun Magnetics Ltd. operates under strict quality guidelines to guarantee physical, geometric, and magnetic consistency. Our production facility is certified in accordance with standard global frameworks, including ISO 9001, ISO 14001, OHSAS 18001, API 6D, and CE certifications.
Our quality verification sequence includes:
1. Spectroscopy Analysis: Verification of raw material purity prior to melting.
2. Laser Particle Size Distribution: Ensuring raw powders are milled to sub-micron dimensions.
3. Automatic Dimensional Checks: Laser micrometer analysis of post-ground profiles.
4. Flux & Hysteresis Graph Testing: Accurate plotting of demagnetization curves under different temperatures.
Understanding and addressing the needs of our international corporate buyers.
We work seamlessly with engineers using 3D CAD modeling and finite element method (FEM) simulations to determine optimal magnetic paths and mechanical constraints before tooling up for mass production.
Modern procurement demands regulatory compliance. We provide full chemical composition sheets, RoHS and REACH declarations, and conflict mineral certificates to satisfy corporate auditing teams.
Rare earth magnets are highly active materials. We utilize special metal-shielded boxes for air freight shipments, preventing magnetic fields from interfering with aircraft navigation systems, alongside heavy vacuum-packed ocean packaging.
The rare earth permanent magnet sector is undergoing rapid technological updates. As electric mobility and green energy infrastructures surge, global demand for high-performance sintered NdFeB continues to scale up. Understanding these developments helps buyers design future-proof systems:
Due to the cost volatility and localized distribution of Dysprosium (Dy) and Terbium (Tb), research is heavily focused on developing permanent magnets with lower heavy rare earth content. Zhejiang Laysun Magnetics is at the forefront of this trend. Our Grain Boundary Diffusion (GBD) technology diffuses Dy/Tb into the magnet structure precisely where it is needed—along the grain boundaries—rather than through the entire grain body. This delivers high coercivity while utilizing up to 70% less heavy rare earth elements.
Green initiatives and ESG mandates are driving efforts to retrieve magnet materials from end-of-life products. Recycled neodymium is increasingly integrated into production processes, slashing carbon emissions by 60% compared to primary mining sources. Our facilities are actively building partnerships to recycle manufacturing scrap and old motor parts, ensuring a resilient supply of raw material.
To reduce raw material waste during cutting and grinding, we employ near-net shape pressing technologies. This allows us to press raw powders directly into complex geometries, reducing machining times, raw oxide consumption, and ultimate production costs for our customers.
Insights into custom neodymium magnet selection, manufacturing limits, and ordering processes.
The operating temperature limits of NdFeB are determined by its chemical composition, specifically the inclusion of heavy rare earth elements (Dy and Tb) which increase coercivity. Grade suffixes denote temperature ratings: Standard (80°C), M (100°C), H (120°C), SH (150°C), UH (180°C), and EH/AH (200°C). Working temperature thresholds also depend on the magnet's shape and the surrounding magnetic circuit design.
Neodymium magnets are rich in iron and easily corrode or oxidize in humid environments. A surface coating blocks air and moisture. The industry standard is multi-layer Nickel-Copper-Nickel (Ni-Cu-Ni), which offers good corrosion protection and mechanical strength. For high-humidity or marine applications, epoxy resins or rubber coatings are highly recommended due to their superior chemical resistance.
Prototyping samples generally require 10 to 15 days, which includes tooling setup, slicing, and precision plating. Mass production quantities typically range from 20 to 30 days depending on grade, size complexity, and shipping requirements.
Yes, our engineering department provides comprehensive finite element analysis (FEA) and 2D/3D magnetic field simulations. We work directly with your design inputs to determine optimal magnetic geometry, reducing materials and structural costs.
We follow strict SPC (Statistical Process Control) standards throughout production. Utilizing demagnetization curve testers, Hysteresisgraphs, and ICP spectrometers, we ensure magnetic consistency from piece to piece, and batch to batch. Every shipment includes a corresponding inspection report and certificate of conformity.
We can manufacture virtually any shape, including custom arcs, blocks, discs, cylinders, rings, multi-stepped shapes, countersunk configurations, and custom assemblies with metal components. Our computer-controlled wire EDM cutting and grinding machines ensure precision tolerances down to +/- 0.05 mm.
Yes, we provide fully-assembled motor parts (rotors, stators, and sensor targets). Working with specialized adhesives and dynamic balancing equipment, we supply finished magnetic assemblies directly to your production lines, eliminating magnet assembly steps in your factory.
For air cargo shipments, we apply specialized shielding packages. The magnets are placed inside iron-lined packaging boxes that contain the magnetic field. This complies with standard IATA regulations, ensuring the field does not interfere with the pilot's navigation systems.
Explore specialized industrial items including magnets for badge accessories, heavy lifting components, and custom blocks.
Partner with Zhejiang Laysun Magnetics. Our application engineers are ready to help you compute magnetic circuits, select grades, and plan prototypes.
Laysun Magnetics