High-performance sintered and bonded NdFeB configurations ready for precision assembly lines worldwide.
Established in 1999, Zhejiang Laysun Magnetics Ltd. has evolved into a premier national high-tech enterprise. We specialize in the R&D, manufacturing, processing, and distribution of state-of-the-art sintered and bonded Neodymium-Iron-Boron (NdFeB) permanent magnets.
Our expansive manufacturing complex covers over 100,000 square meters in Sichuan, housing standard-setting raw material processing, precision cutting, testing and surface treatment suites. Our workforce of 300+ engineering and operational personnel delivers an annual output exceeding 5,000 tons of premium-grade magnetics.
Why this specific form factor acts as the cornerstone for micro-actuators, consumer electronics, and automotive sensors.
The 12mm x 3mm Neodymium disc magnet represents an ideal aspect ratio for modern engineering. Operating under high magnetic flux requirements with strict spatial limits, this geometry strikes a precise balance between magnetic moment and demagnetization resistance (PC value). Typically ordered in grades ranging from N35 up to N52, as well as high-temperature variants like N42SH, N45EH, or N38AH, it offers remarkable power density in a small profile.
Because NdFeB is highly susceptible to oxidation, the choice of coating dictates the component's life cycle. Below is a comprehensive breakdown of standard coatings applied to the 12mm x 3mm profile at Zhejiang Laysun Magnetics Ltd.:
| Coating Type | Layer Thickness | Salt Spray Rating (SST) | Optimal Application Target |
|---|---|---|---|
| Ni-Cu-Ni (Triple Layer) | 12 - 18 μm | 48 - 96 Hours | General electronic sensors, office machinery, consumer accessories |
| Black Epoxy / Resin | 15 - 25 μm | 96 - 240 Hours | High humidity environments, marine electronics, outdoor gear |
| Zinc (Zn) Plating | 5 - 10 μm | 24 - 48 Hours | Cost-sensitive assemblies requiring subsequent overmolding |
| Parylene C | 2 - 10 μm | Vapor Barrier / High Spec | Biomedical devices, implantable sensors, aerospace instruments |
Strategic integration of advanced magnetic technologies across industries pushing the boundaries of electrification and automation.
In electric vehicles (EVs) and advanced driver-assistance systems (ADAS), 12mm x 3mm magnets are integrated into high-precision position sensors, throttle control units, and Electronic Power Steering (EPS) systems. By employing dysprosium-diffusion technology, we ensure thermal stability up to 220°C without sacrificing magnetic energy output.
Precision brushless DC (BLDC) motors require high-coercivity disc magnets to manage high RPMs and rapid torque shifts. Our high-grade N52 and N55 NdFeB formulations deliver optimal force vectors, enabling lighter and more compact robotic joints and automated pick-and-place arms.
From mini wind turbines to generator exciters, Zhejiang Laysun Magnetics provides structural durability. By controlling impurities during the sintering process, we reduce eddy current losses within high-frequency rotor assemblies.
Zhejiang Laysun Magnetics leverages automated manufacturing to achieve dimensional accuracy of ±0.05mm (and down to ±0.02mm upon custom request). Our facility integrates smart weighing systems for raw rare-earth alloys, multi-directional hydraulic pressing systems under inert atmosphere protection, and automatic high-speed slicing machines.
By optimizing our material yields and relying on domestic rare-earth deposits in Southwest China, we insulate our global clients from raw material market volatility, assuring consistent delivery timelines and stable pricing structures.
Meeting global manufacturing standards, material traceability, and international regulatory conditions.
Zhejiang Laysun Magnetics complies with globally recognized frameworks. Our operations are certified under ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018. We also support automotive clients with PPAP documentation packages.
Magnets classified as hazardous for air freight are shipped in double-shielded iron-lined packaging. Our logistics network ensures seamless shipping, whether you require sea freight container deliveries or expedited air solutions.
All permanent magnets leaving our facility are compliant with EU RoHS and REACH directives, ensuring they are free from restricted conflict materials and harmful substances.
Addressing technical and commercial inquiries from procurement professionals and design engineers.
Standard N-grade magnets are rated up to 80°C (176°F). However, if your application experiences higher temperatures, we can customize the alloy composition to support high-temperature grades like M (up to 100°C), H (up to 120°C), SH (up to 150°C), UH (up to 180°C), or EH (up to 200°C).
We employ advanced vacuum sintering furnaces and automated sorting systems. Every batch undergoes hysteresisgraph testing (demagnetization curve verification), fluxmeter testing, and laser dimensional inspections prior to packaging and dispatch.
Yes, we provide custom configurations. The 12mm x 3mm dimensions can be axially magnetized, diametrically magnetized, or manufactured with countersunk holes, custom block steps, or arc segments to fit specialized assemblies.
Standard sample configurations take 7-10 working days. Large bulk production orders typically ship within 20-30 days, depending on coating specifications and custom engineering requirements.
Zhejiang Laysun Magnetics supplies heavy-duty lifters, fishing magnets, voice coil motors, and custom NdFeB blocks.
Laysun Magnetics
