Explore our high-performance permanent magnetic components designed for precision manufacturing, electric motors, sensors, and structural assemblies.
Since our establishment in 1999, Zhejiang Laysun Magnetics Ltd. has dedicated over two decades to state-of-the-art R&D and advanced manufacturing of high-performance rare earth permanent NdFeB magnets.
As a recognized national high-tech enterprise, our modern production footprint extends across a 100,000 square meter factory complex in Suining, Sichuan. Operating at the forefront of electromagnetic material engineering, our team of 300+ professionals delivers robust, tailored magnetic solutions for micro-motors, acoustic equipment, medical instrumentation, automotive powertrains, and consumer electronics worldwide.
Analyzing material composition, structural metrics, magnetic field distribution, and protective finish technologies for industrial operations.
The 3/4" diameter by 1/8" thickness (equivalent to 19.05mm x 3.175mm) disc/cylinder configuration represents one of the most widely adapted shapes in modern electronics and structural closures. This specific form factor balances a low profile with a relatively wide surface area, optimizing magnetic flux coverage across mating components.
Sintered Neodymium-Iron-Boron (NdFeB) is the strongest commercially available permanent magnetic material. In a 3/4" x 1/8" configuration, the magnet offers superior pull force values when compared against ferrite or AlNiCo alternatives, making it the design standard for high-performance enclosures, VCM drivers, and magnetic sensor arrays.
| Performance Grade | Remanence (Br) | Coercivity (Hcb) | Intrinsic Coercivity (Hcj) | Max Energy Product (BH)max | Max Operating Temp (Std) |
|---|---|---|---|---|---|
| N35 | 11.7 - 12.1 kG | ≥ 10.8 kOe | ≥ 12.0 kOe | 33 - 36 MGOe | 80°C (176°F) |
| N42 | 12.8 - 13.2 kG | ≥ 11.5 kOe | ≥ 12.0 kOe | 40 - 43 MGOe | 80°C (176°F) |
| N52 | 14.2 - 14.7 kG | ≥ 11.1 kOe | ≥ 11.0 kOe | 49 - 52 MGOe | 80°C (176°F) |
| N42SH | 12.8 - 13.2 kG | ≥ 12.0 kOe | ≥ 20.0 kOe | 40 - 43 MGOe | 150°C (302°F) |
| N35EH | 11.7 - 12.1 kG | ≥ 11.0 kOe | ≥ 30.0 kOe | 33 - 36 MGOe | 200°C (392°F) |
Standard raw NdFeB is highly prone to oxidation. Our 3/4" x 1/8" magnets feature industrial multilayer coatings (typically Ni-Cu-Ni or Black Epoxy), engineered to withstand prolonged Salt Spray Tests (SST) in humid environmental profiles.
Through finite element analysis (FEA), the magnet's pull force profile is optimized. Depending on the assembly layout, we configure axially magnetized or diametrically magnetized configurations to maximize work-piece interaction.
Automated precision grinding allows us to maintain tight mechanical tolerances of up to ±0.05mm (±0.002 inches) on both diameter and thickness, supporting seamless automated assembly integration.
How technical buyers manage raw material risks, environmental compliance, and cost optimization when purchasing bulk rare earth magnets.
The global transition towards electrification has placed Neodymium, Praseodymium, Dysprosium, and Terbium on critical raw materials lists. Zhejiang Laysun Magnetics maintains a resilient supply network directly linking raw mineral refining to final consolidation at our 100,000㎡ plant, minimizing downstream production delays.
Our automated raw-material tracking provides full visibility into chemical composition, grain-size distribution, and oxygen levels. By refining the metallurgical process, we optimize material cost structures, allowing us to supply global distributors and OEMs with stable pricing models despite raw-material fluctuations.
Sintered NdFeB magnets form the mechanical core of smart industrial, consumer, and automotive architectures.
Zhejiang Laysun Magnetics custom fabricates a variety of permanent magnet grades, geometries, and specialized sub-assemblies.
Zhejiang Laysun Magnetics operates under rigorous international quality frameworks. Our production workflows conform to ISO 9001, ISO 14001, ISO 18001, and TS16949 / IATF 16949 automotive industry benchmarks, ensuring structural repeatability and uniform magnetic flux across production batches.
Each batch of magnets undergoes thorough destructive and non-destructive analysis, including Hemi-spherical flux integration, demagnetization testing (BH curves), and environmental simulation chambers (PCT & SST testing) to verify reliability in harsh conditions.
We provide certification documents including REACH, RoHS, API 6D, and API 607 compliance statements for precision industrial safety integrations.
Zhejiang Laysun Magnetics - Serving Global High-Tech Hubs from Hangzhou and Sichuan, China
Discover how our material scientists are shaping the future of high-temperature magnetics and sustainable production.
By using Grain Boundary Diffusion (GBD) technology, we reduce dependence on expensive heavy rare earths (Dy/Tb) while maintaining intrinsic coercivity, resulting in more cost-effective solutions for clients.
We are scaling closed-loop recycling capabilities to reclaim NdFeB magnets from old motors, processing them back into certified powders to support target eco-footprint goals.
Developing advanced Parylene and fluorinated epoxy finishes to extend the lifespan of sub-assemblies in corrosive, marine, and biological environments.
Access direct technical answers from our engineering team regarding design parameters and manufacturing options.
Explore our heavy-duty pot magnets, rubber-coated options, block configurations, and segment rotor magnets for high-power generation.
Laysun Magnetics
