1. Product Overview

NdFeB square strong magnets are made primarily from Neodymium (Nd), Iron (Fe), and Boron (B), using high-precision sintering processes. As a third-generation rare earth permanent magnetic material, they are known for their strong magnetic force, compact size, customizable shapes, and stable magnetic performance. The square design offers additional advantages in installation, alignment, and magnetic circuit design, making them widely used in sensors, automation equipment, motors, magnetic fixtures, audio devices, toys, and packaging.

2. Technical Specifications

Product Name: NdFeB Square Strong Magnet
Magnet Grade: (Br ≥ 14.8KGs, Hcj ≥ 10.5KOe)
Product Dimensions:
Tolerance: Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm
Working Temperature: ≤ (customizable for high-temperature versions)
Density: ≥ 7.5g/cm³
Magnetic Field Strength (Surface Gauss): (Measured manually with Japan TM-801 Gaussmeter)
Magnetic Flux Value: (Measured with fluxmeter)

3. Manufacturing Process

wire cutting three times to make this shape.

4. Surface Treatment and Coating Technology

To enhance corrosion resistance and appearance:
Default Plating: Triple-layer Ni-Cu-Ni (customizable).
Standard Thickness: Ni (3μm) + Cu (5μm) + Ni (4μm).
Optional Plating: Single-layer Zn (5μm) for cost-sensitive projects.

5. Appearance and Dimensional Inspection Standards

• Manual Inspection with Micrometers or Calipers: Ensures dimensional accuracy and compliance.
• Visual Inspection: Under standard lighting, checks for visible defects or cracks.
• 2D Image Measurement System: Measures irregular or complex shapes accurately.
• Magnetic Flux Measurement: Ensures consistent magnetic strength across batches.

6. Reliability Testing

• Impact and Vibration Testing: Simulates transport and operational vibrations to ensure product durability.
• High Temperature Demagnetization Testing: Confirms magnetic stability in high-temperature environments for long-term use.
• Damp Heat Testing: Exposes magnets to high humidity to test moisture and corrosion resistance.

7. Packaging and Transportation

• Defective Screening: Removes non-conforming magnets based on appearance and size.
• Magnetization and Neat Alignment: Each magnet is evenly magnetized and packaged as per customer requirements.
• Vacuum Packaging: Protects against moisture and magnetic interference.
• Outer Packaging: Shock-resistant, moisture-proof, and anti-magnetic interference boxes ensure safe transport.

8. Application Fields

• Brushless Motor Systems: For electric tools, EV drive systems, and servo motors, providing stable magnetic output.
• Sensors and Measurement Equipment: Widely used in displacement sensors, Hall sensors, and encoders for precise position and speed feedback.
• High-End Medical Devices: For MRI components and magnetic fixing systems.
• Industrial Automation: Used in positioning and clamping systems on production lines.
• Smart Wearables: Magnetic attachments for smartwatches, earphones, etc.

9. Usage Precautions

• Handling: NdFeB material is hard but brittle. Avoid dropping or colliding to prevent damage.
• Safe Operation: Strong magnetism requires sliding separation to prevent pinching. Avoid bending.
• Correct Installation: Ensure proper polarity based on geometry for normal equipment operation.
• Storage: Keep away from high temperature, humidity, and corrosive environments.
• Magnetic Interference: Keep away from hard drives, IC cards, pacemakers, etc.

10. Customization and Services

• Customizable sizes, shapes, and coatings (layers, thickness, color)
• Tailored magnetic strength and pole orientation
• Laser logo engraving or serial number marking
• Dedicated packaging designs and suction force testing for special applications

11. Why choose Jinconn Magnet

11.1 Company Introduction

Dongguan Jinkun New Materials Holdings Co., Ltd. specializes in the research, development, production, and sales of high-performance magnetic materials. Upholding the philosophy of "Technology as the foundation, Quality as the core," the company is committed to becoming a global leader in magnetic material solutions. Its products are widely used in fields such as new energy vehicles, intelligent manufacturing, electronic communications, automation equipment, and medical devices, earning the trust of customers both at home and abroad. Looking ahead, the company will continue to be driven by customer needs, promote technological innovation and industrial integration, contribute to the advancement of the global smart industry, and strive to become a benchmark enterprise and strategic partner in the magnetic materials industry.

11.2 Team Spirit

We are pleased to offer free customized magnet solutions tailored to your specific needs.
If you require samples, technical datasheets, or certifications such as MSDS, RoHS, ISO 9001, QC080000, IATF 16949, ISO 14001, or ISO 27001, our sales engineers are ready to assist you.