Radial Arc Segment Neodymium Magnet For High-Performance Permanent Magnet Motors

The Neodymium Iron Boron Arc Segment Magnet offered here is designed for high-efficiency motor assemblies where precise magnetic field distribution and optimal space utilization are critical. Its radial geometry makes it ideal for surface mounting on rotors or stators in brushless DC (BLDC) motors, servo motors, and wind turbine generators.

Engineers often specify this type of Magnet when designing compact, high-torque-density rotating systems that require excellent heat resistance and minimal flux leakage. Compared with assembled discrete magnets, a precision-ground Arc Segment provides superior concentricity, stronger mechanical integrity, and more efficient magnetic circuit closure in rotary applications.

• Material: Sintered Nd–Fe–B (neodymium iron boron)
• Magnetic Grades: N35–N52 for different field strength and temperature ranges
• Shape: Ring / toroid - outer diameter, inner diameter, thickness per design
• Magnetization: Axial or radial, depending on rotor/stator layout
• Coating: Nickel-copper-nickel standard; epoxy or zinc coatings optional
• Temperature Capability: Standard grades up to ~80 °C; high-temperature grades available

Because NdFeB offers one of the highest energy products among permanent magnets, even moderate ring sizes deliver substantial field strength, reducing assembly size.

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• High-Speed Rotors: Precision-ground Arc Segments with excellent mechanical integrity for minimal imbalance at high RPM.

• High-Torque Density Motors: Radially magnetized tiles that optimize the air-gap flux for maximum output in a given volume.

• Cogging Torque Reduction: Tight control over arc angle and dimensions minimizes torque ripple for smooth operation.

• Automated Assembly: Consistent geometry and magnetization facilitate robotic handling and bonding in automated production lines.

  Common applications are critical in electric and hybrid vehicle powertrains, aerospace actuators, precision CNC machinery, and high-performance industrial pumps. As a Long-Term Magnet Supplier, we ensure these magnets provide not only superior magnetic performance but also the batch-to-batch consistency required for scalable, reliable manufacturing.

Custom Solutions for High-Volume & OEM Projects
We support your project from prototype to mass production with comprehensive customization:

Precision Dimensions: Custom radii, angles, and thicknesses with grinding to tight tolerances.

Engineered Magnetization: Radial, parallel, or multi-pole designs to meet specific flux requirements.

Enhanced Durability: Coatings selected for corrosion, temperature, and mechanical resilience.

Full Traceability: Lot-controlled production with complete documentation.

Samples are available to validate performance prior to Bulk Orders. Let us provide the technical consistency and supply reliability your critical motor projects require.

Each batch includes:

• Dimensional inspection
• Magnetic flux and coercivity measurement:Batch-level testing of flux density and thermal stability (via Hcj measurement) to confirm performance matches specified grade, even under high operating temperatures.
• Coating quality verification
• Batch traceability records

These controls ensure that every magnet meets industrial standards for consistent performance.

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