Premium quality rectangular Slotted Neodymium Magnet

1. Product Overview & Application Scenarios

Crafted from high-performance neodymium-iron-boron (NdFeB), this customized precision-engineered high stability rectangular slotted neodymium magnet features a central cutout optimized for high-accuracy alignment and mechanical integration. Its advanced triple-layer delivers superior corrosion resistance, surface hardness, and long-term structural stability—making it ideal for demanding industrial and electro-mechanical applications.

Commonly used in smartwatches, fitness trackers, and modular magnetic battery packs.
Enables fast attachment/detachment with reliable retention, improving both usability and comfort.
Customized magnetization for compact embedded designs.

With its compact form factor, strong magnetic force, and customized structure, this precision customized premium quality high temperature resistance rectangular slotted neodymium magnet is ideal for precision alignment, quick-connect assembly, and non-contact applications in both wearable technology and medical devices.

2.Technical Specifications

Product Name: Premium quality rectangular Slotted Neodymium Magnet

Magnet Grade: N52  (Br ≥ 14.8 KGs, Hcj ≥ 10.5 KOe) — Customizable

Dimensions: L20 x 10 x 5 mm

Tolerance: ±0.05 mm (Length, Width, Thickness)

Operating Temperature: ≤ 80°C (Customizable high-temp versions available)

Density: ≥7.5 g/cm³

Surface Magnetic Field: 2400 Gauss (Measured using Japan TM-801 Gauss meter)

Magnetic Flux: 2.2 mWb (Measured; value varies by material grade) 

3.  Surface Treatment & Coating Technology

To enhance this customized high magnetic strength energy efficient rectangular slotted neodymium magnet’s corrosion resistance, surface quality, and magnetic stability, the following treatments are used:

- Cleaning & Degreasing:  

  Ultrasonic cleaning with alcohol/specialized solvents 

- Activation Treatment:  

Immersion in dilute HCl/H₂SO₄ → Improved coating adhesion

4. Appearance & Dimensional Inspection

Visual Inspection: Under standardized lighting, trained QC staff check for cracks, chipping, inclusions, pores, or oxidation.

Magnetic Flux Consistency Test: Fluxmeters or Hall-effect testers measure magnetic flux across batches to ensure uniform performance in end-user applications.

5. Reliability Testing

To ensure the customized high adhesive force rectangular slotted neodymium magnet  maintain excellent corrosion resistance in complex or harsh environments, the salt spray test is an essential accelerated aging method. It simulates long-term exposure to marine climates, industrial pollution, humidity, or acidic and alkaline conditions, allowing for a reliable evaluation of the protective performance and durability of the magnet's surface coating.

Constant Temperature & Humidity Test: Performed under 85°C and 85% RH for 96–500 hours. Performance and appearance are compared before and after testing.

6. Packaging & Transportation

Defect Elimination: 100% inspection using calipers, projectors, visual checks, and automated systems to reject cracked, chipped, oxidized, or coated-defective magnets.

Uniform Magnetization & Structured Arrangement: Magnets are uniformly magnetized and arranged for optimal packaging based on customer requirements to ensure performance and facilitate automated assembly.

Vacuum Sealed Packaging: Multi-layer vacuum sealing with moisture barriers, desiccants or nitrogen, prevents corrosion and magnetic interference during storage and shipping.

Customized Outer Packaging: Shock-proof, moisture-resistant, and anti-magnetic leakage packaging (e.g., multilayer cartons, plastic boxes, metal shielding) ensures compliance with international logistics standards. Each box includes a product list, labels, and tracking codes.

7.FAQ

Q. What is the purpose of the slot or hole in the magnet?

The slot is designed for precise mechanical alignment, fastener placement, or structural integration in assemblies such as motors, fixtures, or magnetic couplings.

Q. Is demagnetization a concern during transport or long-term use?

No, unless exposed to strong reverse fields or extreme heat. Proper storage and magnetization protection ensure long-lasting performance.

Q. How long does salt spray testing last for this magnet?

Our coatings pass neutral salt spray tests up to 96h, 240h, or even 720h depending on the coating type. Test reports are available on request.

8. Usage Precautions？

⚠ Safety & Handling Guidelines

Handle with care: Neodymium magnets are brittle and can chip or crack if dropped or impacted.

Avoid injury: Always slide magnets apart—do not force or pry them to separate.

Check polarity before use: Incorrect installation may cause malfunction or damage to equipment.

Store properly: Keep in a dry, neutral environment; avoid contact with moisture, acids, or corrosive substances.

Keep away from sensitive electronics: Do not place near hard drives, magnetic cards, pacemakers, or similar devices.

10. Customization & Services

Customizable magnet dimensions, geometry, and surface coatings (including layer count, thickness, and color)

Precision magnetization orientation and adjustable magnetic field intensity

Optional laser marking for logos, part numbers, or traceability codes

Specialized packaging and pull-force testing tailored to your application needs

With deep expertise in magnetic materials, we deliver solutions for industries like EVs, smart manufacturing, and electronics. Our strong technical capabilities and product consistency have earned the trust of customers worldwide.

 Precision Magnetics, Tailored for Performance.

If you have any magnet-related needs, we offer free customized magnet services. Please feel free to contact us at any time.

Contact Us：
 Phone/WhatsApp/WeChat: +86 13829120676
 Email: Info@jinconn.com
 Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province, China.