Square NdFeB permanent magnet

1. Product Overview

Square neodymium (NdFeB) permanent magnets, with their groundbreaking energy product and sub-millimeter precision machining control, have become the core power source in advanced electromechanical systems such as new energy vehicle drive motors and high-precision sensors. Through the synergy of ultra-high remanence (Br > 1.4T) and strong intrinsic coercivity (Hcj ≥ 20 kOe), these magnets enable maximum magnetic output in miniaturized designs, significantly boosting the power density of high-efficiency systems.

2. Technical Parameters

- Product Name: Square NdFeB Permanent Magnet
- Magnet Grade: 48H (Br ≥ 14.3 KGs, Hcj ≥ 12.8 KOe)
- Dimensions: L16 × 16 × 4 mm
- Dimensional Tolerance: ±0.05 mm in length, width, and thickness
- Working Temperature: ≤ 120°C (high-temperature versions available)
- Density: ≥ 7.5 g/cm³
- Surface Magnetic Field: 4200 Gauss ± 200 Gauss (measured with TM-801 Gauss meter, Japan)
- Magnetic Flux: 2.0 mWb (measured with fluxmeter)

3. Manufacturing Process

Wire Cutting: 3 cuttings to make this shape

4. Surface Treatment & 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 & Dimensional Inspection Standards

- Dimensional Tolerance Control: 3D coordinate measuring machines, laser profilers
- Surface Defect Inspection: White light interferometers, 10x magnifying lens visual inspection
- 2D Optical Measurement: Applied to irregular or non-standard structures

6. Reliability Testing

- Temperature Cycling: Magnets are exposed to -40°C to +80°C to evaluate changes in magnetic and physical properties.
- Humidity Testing: >90% RH environment used to inspect for rust, corrosion, and magnetic performance degradation.
- Salt Spray Test: Simulates coastal conditions to assess corrosion resistance.
- Impact Test: Magnets are subjected to impact forces to check for cracking or breakage.

7. Packaging Process & Instructions

- Elimination of products with visual or dimensional defects
- Qualified items are magnetized and arranged neatly
- Packaged in boxes per client quantity requirements with custom labels
- Vacuum-sealed packaging with anti-magnetic shields and shock-absorbing pads
- Inner boxes placed in outer cartons for moisture, impact, and magnetic interference protection
(Custom packaging available)

8. Application Fields

- Consumer Electronics & Robotics: TWS earphone micro motors – eliminates magnetic leakage, improves resistance to external magnetic interference
- Advanced Research Fields: Magnetically controlled micro/nano robots; fusion–fission hybrid reactors
- Medical Imaging & Therapy: Multi-stage magnets for proton therapy beamline control

9. Usage Precautions

- Handling: NdFeB material is hard but brittle; avoid dropping or impact
- Safety: Avoid bending; slide magnets apart to prevent pinching
- Installation: Identify and match polarity correctly for safe and stable operation
- Storage: Avoid high temperature, humidity, and corrosive environments
- Isolation: Keep away from HDDs, IC cards, pacemakers, and other sensitive electronics

10. Customization & Services

- Customization available for size, shape, coating layers (number, thickness, color)
- Magnetic orientation and strength can be tailored
- Laser engraving available for logos or serial numbers
- Custom packaging and pull-force testing solutions for specific application

11. Why choose Jinconn Magnet

Dongguan Jinconn New Materials Holdings Co., Ltd.specializes in the development and manufacturing of high-performance magnetic materials. Upholding the philosophy of “Technology-Oriented, Quality-Centered,” the company is committed to becoming a global leader in magnetic solutions. Its products are widely applied in electric vehicles, smart manufacturing, electronics, and medical devices, earning strong recognition from clients worldwide.

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