NdFeB Irregular Magnet

Free of Export Control Substances

1. Geometric Shape Customization

Based on the 2D/3D drawings or samples provided by customers, we can manufacture magnets in any complex shape.

2. Magnetic Performance Customization

For special applications, we can also adjust the squareness (Hk/Hcj), maximum energy product ((BH)max), and temperature coefficient to ensure stable performance under extreme environments.

3. Surface Coating Customization

Sintered NdFeB is easily oxidized and must be protected with a coating. We recommend the optimal coating based on your actual application environment (humidity, salt spray, temperature, contact media, biocompatibility, etc.), or we can strictly apply the coating type you specify:

• Nickel (Ni‑Cu‑Ni): Most common, salt spray ≥48 hours, bright appearance, suitable for most indoor environments
• Zinc (Zn): Blue‑white or colored zinc, cost‑effective, red rust resistance ≥72 hours
• Epoxy: Thickness 15‑30μm, good insulation, salt spray resistance up to 200 hours
• Phosphate: Temporary anti‑rust primer, suitable for pretreatment before overmolding
• Special coatings: Gold, silver, etc.

We can provide coating adhesion tests, salt spray test reports.

4. Magnetization Direction Customization

 We support multiple magnetization schemes:

• Single‑direction magnetization: magnetized along a specific axis (e.g., length, width, thickness direction)
• Multi‑pole alternating magnetization: forming N/S/N/S alternating poles on the same plane (number of poles can be specified from 2 to 32)
• Radial / spoke magnetization: suitable for irregular rings or cylinders with a center hole – the magnetic field radiates outward from the center
• Bevel / conical magnetization: for special angle sensors or magnetic encoders.