High-Performance Custom-Shaped Neodymium Magnet

1. Product Overview

This is a high-performance custom-shaped neodymium magnet with N52 grade, featuring extremely high magnetic strength, excellent demagnetization resistance, and precise dimensional accuracy. The product's precision can be customized according to customer requirements. Its sophisticated custom-shaped design meets high-performance magnetic needs in compact spaces, making it widely applicable in high-end electronic devices, smart wearables, industrial power tools, magnetic toys, and other fields.

The magnet is manufactured using advanced profile cutting and grinding processes, ensuring neat edges and uniform dimensions. Surface treatment includes multi-layer metal coating (Ni+Cu+Ni) or optional Zn coating, effectively preventing oxidation and corrosion from environmental factors, thereby extending the product's service life.

2. Technical Specifications

Product Name:  Custom-shaped high-performance rare earth neodymium magnet
Material Grade:  N52 (Br ≥ 14.2 kGs, Hcj ≥ 12 kOe)
Dimensions:  Y12 × 5 × 8 mm (custom sizes available)
Dimensional Tolerance:  Length ±0.05 mm, Width ±0.05 mm, Thickness ±0.05 mm
Operating Temperature:  ≤80℃ (high-temperature versions customizable)
Density:  ≥7.5 g/cm³
Magnetic Pole Marking:  N-pole laser engraving for easy assembly identification. Custom marking patterns available. For high salt spray resistance requirements, inkjet or scribed markings can be used as N-pole identifiers.
Surface Magnetic Field:  5000 ± 200 Gauss (measured with Japanese TM-801 Gauss meter)
Magnetic Flux Value:  2.3 mWb (measured with fluxmeter)

3. Manufacturing Process

The product is manufactured through the following key processes:

Profile Cutting: Uses specialized non-standard wire cutting equipment for non-square/non-circular geometric processing.

Grinding: Used for complex structures and high-precision profile finishing to ensure dimensional and geometric tolerances.

Demagnetization Treatment: Initial demagnetization followed by precise magnetization to prevent magnetic deviation after assembly.

Laser Marking: N-pole identification, supporting custom patterns or serial numbers.

4. Surface Treatment and Coating Technology

To enhance corrosion resistance and appearance quality, the following surface treatment solutions are adopted:

Default Coating: Triple-layer nickel-copper-nickel (Ni-Cu-Ni). Coating can be customized according to customer requirements.

Coating Thickness Standard: Ni (3μm) + Cu (5μm) + Ni (4μm). Coating thickness can be customized as needed.

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

Coating Features:

Resistant to salt spray corrosion and improved oxidation resistance.

Increased surface hardness to prevent scratches.

Enhanced appearance glossiness, suitable for exposed components.

5. Appearance and Dimensional Inspection Standards

To ensure consistent and reliable product quality, all products undergo the following inspection processes:

Manual dimensional inspection with micrometers/calipers.

Visual inspection (under 800-1200 lumen lighting at 20-30 cm standard inspection distance).

2D image measurement (for custom-shaped and non-standard structures).

Automated CCD sorting and full inspection of product appearance and dimensions.

Magnetic flux testing (to ensure batch consistency of magnetic performance).

6. Reliability Testing

6.1 Neutral Salt Spray Test (NSS):

Temperature: 35℃ ±2℃

Salt spray deposition rate: 1~2 ml / 2000px²·h

pH value: 6.5 ~ 7.2

Test duration: 24h / 48h / 72h / 96h (can be set according to application scenarios/customer requirements/project needs).

6.2 Thermal Demagnetization Test:

Placed in a constant-temperature oven (80℃) for 2 hours (test duration can be adjusted per customer requirements).

Demagnetization rate ≤10% is considered qualified.

Simulates thermal stability in real-world applications.

6.3 Drop Test Notice:

This product is not suitable for "tool magnet" drop tests, as neodymium magnets are brittle and strong impacts may cause chipping or cracking.

7. Packaging Process and Instructions

In compliance with magnetic product transportation requirements, we implement professional packaging methods:

Defective items in appearance and dimensions are removed.

Qualified products are uniformly magnetized and neatly arranged.

Customized box quantities and labels per customer requirements.

Each box is vacuum-packed with magnetic shielding plates and shock-absorbing pads.

Small boxes are packed into master cartons with moisture, impact, and magnetic interference protection.

Packaging methods can be customized.

8. Application Fields

This product is widely used in:

Smart wearable devices: Magnetic structures for smart bands, earbud positioning, electric toothbrush charging bases, etc.

Power tool industry: Motor cores, braking systems, sensors, etc.

Magnetic toy manufacturing: Suitable for magnetic building blocks, snap-fit assemblies, DIY toys, etc.

9. Usage Precautions

Handle with care: Neodymium magnets are brittle—avoid impacts, collisions, or drops.

Avoid pinching: The magnetic force is extremely strong—always slide magnets apart instead of pulling them directly.

Polarity identification: Install correctly according to the N-pole marking to prevent device malfunction.

Moisture and corrosion prevention: Store away from high temperatures, humidity, or strong acid/alkali environments.

Keep away from sensitive devices: Strong magnets should be kept away from hard drives, IC cards, pacemakers, etc.

10. Customization and Services

We support various customization services:

Size, shape, and coating (layer count, thickness, color) customization.

Polarity direction and magnetic strength customization.

Laser-engraved logos or serial numbers.

Special application packaging solutions and pull-force testing support.

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