Custom-Shaped High-Performance Rare Earth Neodymium Magnet(1)

1. Product Overview

This product is a high-performance, custom-shaped neodymium magnet with an energy product rated at N52M, delivering exceptional magnetic strength, excellent resistance to demagnetization, and precise dimensional accuracy. Custom dimensions are available upon request. The unique shape is designed to meet high-performance magnetic demands in compact spaces, making it ideal for applications in high-end electronics, wearable devices, industrial power tools, and magnetic toys.

Manufactured using advanced profile-cutting and grinding technologies, the magnet features clean edges and uniform dimensions. Surface treatments include a multi-layer metallic coating (Ni+Cu+Ni) or an optional zinc (Zn) coating, which effectively protects against oxidation and corrosion, significantly extending the magnet’s service life.

2. Technical Specifications

3. Manufacturing Process

• Profile Cutting: Performed using specialized non-standard wire cutting for non-square/circular geometries.

• Grinding: Applied for complex shapes and precision contour finishing to ensure dimensional and geometric tolerance.

• Demagnetization & Charging: Initial demagnetization followed by precise magnetization to prevent deviation after assembly.

• Laser Engraving: N-pole marking, customizable with logos or serial codes.

4. Surface Treatment & Coating

To enhance corrosion resistance and visual quality, the following surface treatments are applied:

• Standard Coating: Triple-layer coating (Ni-Cu-Ni), customizable per customer requirements

• Coating Thickness: Ni (3μm) + Cu (5μm) + Ni (4μm), customizable as needed

• Optional Coating: Single-layer zinc (Zn, 5μm) for cost-sensitive projects

Coating Features:

• Excellent salt spray resistance and oxidation protection

• Improved surface hardness to prevent scratches

• Enhanced glossiness, suitable for visible parts

5. Visual & Dimensional Inspection Standards

To ensure consistency and reliability, all magnets undergo the following inspections:

• Manual size check with micrometers/calipers

• Visual inspection under 800–1200 lumen lighting at 20–30 cm distance

• 2D image measurement for custom or complex geometries

• Automated CCD sorting and full inspection of appearance and dimensions

• Magnetic flux testing to ensure batch consistency

6. Reliability Testing

6.1 Neutral Salt Spray Test (NSS):

• Temperature: 35℃ ±2℃

• Salt deposition: 1–2 ml / 80 cm²·h

• pH: 6.5 – 7.2

• Duration: 24h / 48h / 72h / 96h (customizable per application)

6.2 Thermal Demagnetization Test:

• Storage in oven at 80℃ for 2 hours (customizable)

• Demagnetization rate ≤10% considered acceptable

• Simulates thermal stability in real-world applications

6.3 Drop Test Notice:

• Not suitable for “tool magnet” drop tests due to neodymium’s brittle nature

• Strong impacts may cause chipping or cracking

7. Packaging Process & Instructions

• In compliance with magnetic transport regulations, packaging includes:

• Sorting out defective items

• Uniformly magnetizing and neatly arranging qualified products

• Custom box quantities and labeling per customer requirements

• Vacuum packaging with magnetic shielding plates and anti-shock pads

• Carton packing for moisture, shock, and magnetic interference protection

The Packaging is customizable.

8. Application Fields

This product is widely used in:

• Smart Wearables: Magnetic structures in smart bands, earbuds, and electric toothbrush chargers

• Power Tools: Motor cores, brake systems, sensors, etc.

• Magnetic Toys: Magnetic building blocks, snap-fit toys, DIY assemblies

9. Precautions

• Handle with Care: Avoid drops or collisions as neodymium is brittle

• Avoid Pinching: Extremely strong magnetic force—slide instead of pulling apart

• Polarity Recognition: Follow N-pole marking during assembly to avoid device malfunction

• Avoid Moisture/Corrosion: Store away from high temperature, humidity, or corrosive environments

• Stay Clear of Sensitive Devices: Keep magnets away from hard drives, IC cards, pacemakers, etc.

10. Customization & Support

• We support a wide range of customization options: 

• Size, shape, coating (layer count, thickness, color)

• Polarity direction and magnetic strength

• Laser-engraved logos or serial numbers

• Custom packaging and pull-force testing for special applications

For samples, datasheets, MSDS, RoHS, ISO9001, QC080000, IATF16949, ISO14001, ISO27001 certifications, please contact our sales engineers.