Your Professional Rare Earth Permanent Magnets Supplier
We manufacture and export rare earth permanent magnets for industrial OEM, equipment manufacturing, and magnetic assembly applications. Our product range covers Neodymium Iron Boron (NdFeB) magnets and Samarium Cobalt (SmCo) magnets, with custom grades, dimensions, magnetization directions, surface treatments, and configurations available according to strict application specifications.
From standard discs, blocks, and rings to complex curved segments and drawing-based custom components, we supply reliable permanent magnets for motors, generators, sensors, magnetic couplings, automation systems, pumps, and robotics.
Successful magnetic integration relies on more than nominal strength. Material grade, intrinsic coercivity, operating temperature, corrosion environment, mechanical geometry, and magnetization direction must be engineered together.
Product Specifications
|
Material Type |
Grade Range |
Remanence (Br) [T] |
Coercivity (Hcb) [kA/m] |
Intrinsic Coercivity (Hcj) [kA/m] |
Max. Energy Product ((BH)max) [kJ/m³] |
Max. Operating Temp. [°C] |
|
Neodymium (NdFeB) |
N35 – N55 |
1.17 – 1.48 |
≥868 |
≥955 |
263 – 438 |
80 – 240 |
|
Neodymium (High Temp) |
N35H – N52H |
1.17 – 1.45 |
≥860 |
≥1353 |
263 – 414 |
120 |
|
Neodymium (High Temp) |
N35SH – N50SH |
1.17 – 1.42 |
≥860 |
≥1592 |
263 – 398 |
150 |
|
Neodymium (High Temp) |
N30UH – N45UH |
1.08 – 1.35 |
≥800 |
≥1989 |
239 – 358 |
180 |
|
Neodymium (High Temp) |
N28EH – N42EH |
1.05 – 1.32 |
≥790 |
≥2388 |
223 – 334 |
200 |
|
Samarium Cobalt (SmCo) |
1:5 Series (e.g., YXG18–YXG28) |
0.82 – 1.05 |
474 – 796 |
≥1194 |
135 – 223 |
250 – 300 |
|
Samarium Cobalt (SmCo) |
2:17 Series (e.g., YXG28H–YXG32H) |
1.05 – 1.18 |
636 – 875 |
≥1.99 |
218 – 266 |
300 – 350 |
Advanced Powder Metallurgy: Controlled jet-milling and magnetic-field alignment pressing ensure uniform grain orientation and optimal energy product distribution across high-volume production runs.
Precision Machining Capabilities: In-house diamond wire slicing, grinding, and CNC machining allow tight dimensional tolerances down to plus-or-minus 0.01 mm for complex geometries.
Full-Traceability Quality Systems: Complete batch tracking from raw rare earth element sourcing to final magnetic flux testing, ensuring batch-to-batch consistency.
Custom Magnetic Design Support: Engineering collaboration from initial prototyping and finite element analysis (FEA) to mass production readiness.
Typical Industrial Applications
Electric Motors & Drives: High-coercivity NdFeB and SmCo magnets utilized in EV traction motors, industrial servo motors, and high-speed brushless DC motors to maximize torque density and efficiency.
Power Generation: Permanent magnet rotors for wind turbines, micro-turbines, and portable generators operating under continuous mechanical stress.
Industrial Automation & Robotics: Precision-machined blocks, rings, and arc segments embedded in robotic actuators, linear encoders, and automated guided vehicles (AGVs)..
Pumps & Magnetic Couplings: Hermetically sealed torque transmission assemblies for chemical pumps, mixers, and fluid handling systems utilizing corrosion-resistant magnet grades.
Sensing & Measurement: Micro-sized discs and rectangles deployed in Hall-effect sensors, security systems, and high-precision instrumentation.
Aerospace & Defense: High-temperature SmCo configurations deployed in actuators, navigational instruments, and telemetry equipment exposed to thermal extremes.
Unprotected NdFeB magnets oxidize rapidly in ambient or humid environments. We apply engineered surface treatments tailored to specific working conditions:
Ni-Cu-Ni (Nickel-Copper-Nickel): Standard industrial plating providing robust general protection against indoor humidity and mild handling wear.
Epoxy Coating: Offers superior salt-spray and chemical resistance, commonly selected for marine, medical, or corrosive fluid environments.
Zinc / Passivation / Gold: Alternative finishes applied to meet specific assembly bonding, aesthetic, or environmental compliance standards.
Coating Integrity: Controlled thickness and adhesion testing to prevent edge-chipping and pinhole corrosion during long-term operation.
Standard Geometries and Custom Configurations
We process rare earth magnetic materials into standard geometric shapes or manufacture them directly to engineering drawings.
Disc and Cylinder Magnets
Used extensively in miniature sensors, holding systems, magnetic latches, and compact actuators.
01
Block and Rectangular Magnets
Applied in linear actuators, magnetic separation equipment, large motor stators, and industrial fixtures.
02
Ring and Annular Magnets
Configured for high-speed rotating assemblies, encoder wheels, torque couplings, and acoustic transducers.
03
Segment and Arc Magnets
Precision-ground curved tiles designed specifically for interior permanent magnet motor and generator rotors.
04
Custom-Profiled Magnets
Stepped geometries, countersunk holes, skewed magnetization blocks, and complex assemblies manufactured strictly per customer CAD drawings.
05
Consistency between initial prototypes and high-volume production batches is vital for seamless industrial assembly. Our manufacturing workflow converts raw rare earth elements into finished precision components:
Raw Material Melting -> Jet Milling -> Magnetic Field Alignment Pressing -> Sintering -> Machining -> Surface Treatment -> Magnetization -> Inspection
Rigorous Inspection Standards:
- Dimensional verification using optical and high-precision contact gauges.
- Magnetic performance testing (hysteresis graph testing for Br, Hcb, Hcj, and BHmax).
- Flux output sorting and batch uniformity testing.
- Coating thickness and adhesion verification.
- Full compliance alignment with customer mechanical drawings and acceptance criteria.
FAQ
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