Explore our selection of heavy-duty permanent neodymium magnetic systems built for strict industrial quality assurance.
In the modern manufacturing landscape, processing integrity and product purity are paramount. Permanent magnet bars—often referred to as magnetic filter rods, separator tubes, or tube magnets—represent the frontline defense against tramp iron contamination. Sintered Neodymium-Iron-Boron (NdFeB) magnetic alloys configured inside sanitary 304 or 316L stainless steel tubes enable these systems to produce concentrated, high-gradient magnetic fields capable of capturing micron-scale paramagnetic particles.
Zhejiang Laysun Magnetics Ltd. has spent over two decades pioneering advanced rare earth materials. Established in 1999, we utilize our 100,000 square meter factory in Suining, Sichuan, to maintain end-to-end supply chain governance. This complete vertical integration allows our teams to monitor each phase of manufacturing—from raw material reduction, vacuum induction melting, and jet milling to inert-gas sintering, wire-electrode cutting, and hermetic double-seal laser welding.
Understanding the physics of magnetic separation is vital for system designers. A common point of confusion is the relationship between Surface Gauss and actual pull force. Surface Gauss measures the magnetic flux density at a specific point on the surface of the stainless steel sleeve. High-gradient magnetic fields are generated by stacking NdFeB disc magnets with alternating polarities separated by pole pieces.
For applications requiring the capture of weakly magnetic contaminants (such as rust, work-hardened stainless steel flakes, or iron oxides), a surface rating of 12,000 Gauss to 14,000 Gauss is standard. The internal magnetic circuit configuration dictates the reach of the magnetic flux. When designing our systems, we use finite element analysis (FEA) to balance peak surface Gauss with depth of magnetic field penetration, ensuring efficient capture of flowing metallic debris.
Sourcing permanent magnet systems directly from established Chinese factories provides significant strategic advantages:
Watch our factory introduction video to see how Zhejiang Laysun Magnetics Ltd. engineers the world's most reliable rare-earth magnet configurations under strict ISO regulations.
Headquartered in Hangzhou, China, with subsidiaries and offices positioned to serve partners globally.
Custom-engineered magnetic separation and rare-earth assemblies developed for critical environments.
Utilizing high-gauss, hermetically sealed 316L stainless steel tubes, our magnetic bars extract micro-iron filings and wear-debris from sugar, flour, chocolate pipelines, and dairy powders, meeting USDA, FDA, and EHEDG design rules.
We supply precision NdFeB magnets and sensor rings optimized for Electric Power Steering (EPS) and traction motors. Our materials are engineered for high coercivity and minimal eddy-current losses at high rotational speeds.
Magnetic separation grates containing high-integrity 12,000 Gauss magnetic bars capture sub-micron particles from active pharmaceutical ingredients (APIs), preventing batch contamination and maintaining compliance with GMP norms.
Founded at the turn of the millennium, Zhejiang Laysun Magnetics Ltd. has rapidly evolved from a regional manufacturer into a global leader in high-performance permanent magnet systems. Our Suining factory employs 300+ professionals, utilizing automated pressing systems, multi-wire slicing equipment, and state-of-the-art coating chambers to deliver consistent magnetic properties across every production run.
Our R&D team works closely with equipment manufacturers to develop custom magnetic materials that meet rigorous specifications. From voice coil motor (VCM) magnets and industrial magnet lifters to specialized magnetic components for consumer electronics, we ensure every part delivers optimal thermal stability, anti-demagnetization performance, and corrosion resistance.
Explore our comprehensive portfolio of specialized NdFeB shapes and custom magnetic assemblies.
Laysun Magnetics delivers custom magnetic designs for critical industries globally.
Get custom magnetic circuit modeling and mechanical housing integrations.
Custom air/sea freight shielding packaging for dangerous goods compliance.
To supply industries like aerospace, medical, automotive, and heavy processing, magnetic components must undergo strict validation procedures. Zhejiang Laysun Magnetics Ltd. is fully certified to meet major international standards, including:
Each batch of magnetic bars undergoes demagnetization testing using automated fluxmeters and hysteresis graphs to record the thermal coefficient and intrinsic coercivity (Hcj). We provide complete material traceability, including Gauss maps and dimensional inspection certificates.
We verify our magnetic integrity and welding seals using advanced digital salt spray chambers, thermal chambers, and automated Gaussmeters.
Find answers to common questions about selecting, specifying, and sourcing industrial permanent magnet bars.
Heavy-duty magnetic assemblies and specialty components for global industrial procurement.
Laysun Magnetics