Fan-shaped blue and white coated magnet

1. Product Overview  

Manufactured from high-performance NdFeB material, these fan-shaped magnets feature a blue-white coating formed through precision wire cutting and oriented magnetization. The unique sector design enables efficient magnetic flux concentration, while the coating provides superior insulation and corrosion resistance. Ideal for space-constrained applications requiring precise magnetic field control, such as servo motor rotors, magnetic encoders, and medical imaging equipment.  

2. Technical Parameters

- Product Name: Fan-shaped Magnet  

- Magnetic Grade: 45SH (Br ≥13.8 kGs, Hcj ≥12.4 kOe)  

- Dimensions: R35xR18x17x5 (mm)  

- Dimensional Tolerance: L±0.05mm, W±0.05mm, T±0.05mm  

- Operating Temp: ≤150°C (High-temp version customizable)  

- Density ≥7.5 g/cm³  

- Surface Field: 4600 Gauss (Measured with TM-801 Gauss meter)  

- Magnetic Flux: 2.0 mWb (Fluxmeter tested)  

3. Manufacturing Process

Key production stages:  

- Edge Reinforcement:  

  - Laser cladding with NiCrBSi alloy on edges enhances impact resistance.  

- Curved Surface Adhesion Optimization:  

  - Plasma activation technology improves coating bonding strength.  

- Multi-stage Magnetization:  

  - Radial magnetization with laser positioning marks reduces field uniformity error.  

  - Oriented magnetization via multi-pole magnetizing heads with sequential pulsing.  

4. Surface Treatment & Plating  

- Edge Reinforcement: Laser-clad nickel alloy at seams (prevents electrochemical corrosion).  

- Edge Rounding: Minimizes magnetic field distortion.  

- Standard Plating: Triple-layer Ni-Cu-Ni (customizable upon request).  

- Plating Thickness: Ni(3μm) + Cu(5μm) + Ni(4μm) (adjustable).  

- Electrophoretic Coating: Uniform corrosion-resistant decorative finish applied via electrodeposition.  

5. Appearance & Dimensional Inspection  

Quality control procedures:

- Manual measurement (micrometer/caliper)  

- Visual inspection (800-1200 lux at 20-750px distance)  

- Optical comparator for complex geometries  

- CCD automated sorting for full appearance/dimension check  

- Magnetic flux consistency verification  

6. Reliability Testing

6.1 Environmental Adaptability

- Temperature cycling: -40°C to +80°C  

- Humidity test: >90% RH exposure  

- Salt spray test: ASTM B117 standard  

6.2 Aging Tests  

- Natural aging (months/years)  

- Accelerated aging (thermal/humidity/magnetic stress)  

7. Packaging Process

- Defective unit removal  

- Uniform magnetization and alignment  

- Customized boxing/labeling  

- Vacuum sealing with magnetic shielding & cushioning  

- Moisture/impact/magnetic interference-proof master cartons  

8. Application Fields  

- Automotive: Clutch master cylinders (optimized material usage, radial position stability)  

- Medical: MRI field control, magnetic levitation systems  

- Robotics: Precision drives, high-speed actuators  

 9. Usage Precautions  

- Handle with care: Avoid impacts/drops (NdFeB is brittle).  

- Pinch hazard: Use sliding motion during handling.  

- Polarity identification: Correct orientation prevents operational faults.  

- Environmental protection: Store away from moisture/corrosives.  

- EMI prevention: Keep away from pacemakers, credit cards, and electronics.  

- Safety: Child-safety for small magnets; impact protection for industrial sizes.  

- Corrosion management: Select coated versions for harsh environments.  

10. Customization & Services

Supported options:  

- Dimensions/shape/plating (layers, thickness, color)  

- Polarity direction/magnetic strength  

- Laser marking (logos/SNs)  

- Application-specific packaging & pull force testing  

Documentation available upon request: Samples, specs, MSDS, RoHS, ISO9001, QC08000, IATF16949, ISO14001, ISO27001 certificates.  

11. Why choose Jinconn magnet

Dongguan Jinconn New Materials Holdings Co., Ltd.focuses on the research, development, production, and sales of high-performance magnetic materials. Guided by the philosophy of “Technology as the foundation, Quality as the soul,” the company is committed to becoming a global leader in magnetic material solutions.

· Corporate Culture:
We specialize in providing magnetic material solutions for industries such as new energy vehicles, intelligent manufacturing, and electronic communications. With advanced technology and reliable quality, we have earned the trust of customers worldwide.
In addition, we offer free customized magnet design services. If you have specific requirements, please feel free to contact us!