Discover our specialized portfolio of micro-magnetic components engineered with micro-scale dimensional tolerances, customized coatings, and exceptional magnetic orientation accuracy.
Welcome to Zhejiang Laysun Magnetics Ltd., your trusted partner in the world of advanced magnetic solutions. Since our inception in 1999, we have grown to become a national high-tech leader in manufacturing rare earth magnets, a testament to our unwavering commitment to excellence in this niche field.
In the contemporary industrial ecosystem, micro-miniaturization is the focal trajectory of product design. As microelectronics, aerospace sensors, and biomedical implants demand unprecedented energy density in compact form factors, the sourcing of micro-scale permanent magnets has evolved from standard catalog purchases to highly engineered, custom-designed sub-assemblies. Procurement departments in Fortune 500 enterprises face major technical challenges when acquiring magnets smaller than 1.0 mm: dimensional tolerances must be maintained within ±0.005 mm, magnetic field distribution must show minimal variance, and coatings must offer corrosion resistance without dampening magnetic flux.
At Zhejiang Laysun Magnetics Ltd., we address these requirements through state-of-the-art tooling and advanced raw material refinement. Sintered Neodymium-Iron-Boron (NdFeB) has a high volumetric energy product ($(BH)_{max}$), making it the primary material for sub-millimeter applications. However, handling and processing NdFeB at microscopic scales is challenging due to the material's brittleness and susceptibility to swift oxidation. Our manufacturing facility in Suining, Sichuan, utilizes customized wire-electrode cutting machines, automated dicing saws, and laser ablation systems to machine tiny blocks, rings, and arcs, achieving excellent yield rates while maintaining magnetic performance.
Our research and development division focuses on developing customized technical roadmaps for demanding applications. By utilizing Grain Boundary Diffusion (GBD) technology, we selectively diffuse heavy rare earths (Dysprosium, Dy / Terbium, Tb) into the NdFeB crystal structure. This increases the magnet's intrinsic coercivity ($H_{cj}$) and resistance to demagnetization under elevated operating temperatures, while minimizing the use of expensive rare earths to maintain stable, cost-effective pricing for our partners.
Another major challenge in micro-magnetics is corrosion. Due to the high surface-to-volume ratio of micro-magnets, standard electroplating methods can result in edge build-up, leading to uneven coatings and dimensional issues. Zhejiang Laysun Magnetics has developed specialized chemical vapor deposition (CVD) processes for Parylene, alongside high-precision electro-nickel and epoxy coatings. These systems apply uniform protective layers as thin as 5 to 15 microns while maintaining high corrosion resistance under salt spray testing, ensuring reliable performance in harsh automotive and aerospace environments.
Advanced GBD technology optimizes the distribution of Dy and Tb at the micro-structural boundaries, increasing thermal stability while retaining high remanence ($B_r$) levels.
Parylene, Epoxy, and Ni-Cu-Ni multilayer plating engineered for uniform thickness control between 5μm and 15μm with excellent salt-spray test ratings.
Quality testing protocols including 3D non-contact measurement, fluxmeter testing, and environmental simulation (HAST, PCT) to ensure reliability.
Micro-scale magnetic components play an important role in driving advancements across modern technology sectors. By providing high magnetic flux density within miniature form factors, they enable precision, efficiency, and scalability in various industrial and consumer applications.
Micro-actuators and high-precision encoders in robotic joints require small magnets with tight tolerances to support smooth, repeatable motion control in automation systems.
Brushless motors in drones require small magnets with optimal strength-to-weight ratios to increase payload capacity and battery efficiency during high-speed operations.
Used in high-temperature sub-systems, auxiliary pump motors, and advanced driver assistance systems (ADAS) where long-term performance under heat is required.
Permanent magnets designed for high torque density and resistance to demagnetization under heavy vibration and continuous loading conditions.
Integrated into voice coil motors (VCM) for smartphone camera autofocus systems, haptic feedback actuators, acoustic components, and wireless chargers.
Applied in smart lock sensors, silent brush-less DC motor fans, and variable-frequency compressor units, contributing to energy savings and reduced noise.
Headquartered in Hangzhou, China, Eneroc is building our worldwide subsidiaries and offices to serve our customers. This global structure allows us to provide localized support, technical consultations, and reliable inventory management to international clients.
Our Quality Management Systems (QMS) align with international industrial standards to support demanding automotive, aerospace, and medical engineering projects. We maintain strict compliance with certified standards, including API 6D, API 607, CE, ISO9001, ISO14001, ISO18001, and IATF 16949 (TS). Every batch of raw materials is fully traceable from rare earth mining to final magnetic orientation, providing accountability across the supply chain.
Find technical answers and engineering guidelines for designing, procuring, and handling micro-scale rare earth magnets.
Browse our additional specialized NdFeB products designed to meet custom industrial configurations and mechanical requirements.
Contact our engineering team to request customized miniature magnet designs, sample kits, or detailed technical specifications. We reply to all inquiries within 24 hours with custom price quotes and feasibility reports.
Laysun Magnetics