Product Overview & Application Scenarios
These premium quality high remanence round countersunk magnets are engineered for precision setups where two magnetic parts need to align and attract perfectly when fastened with screws. Featuring a countersunk hole on both polar faces, they allow screws to sit flush while maintaining strong magnetic coupling. Ideal for modular assemblies, detachable panels, precision tools, and marine fittings, these magnets deliver a secure, repeatable, and vibration-resistant hold. Their face-to-face magnetic pairing ensures automatic alignment and eliminates polarity errors, simplifying both installation and daily use. The symmetrical structure also enhances visual appeal, making them perfect for exposed fixtures and premium designs.
Technical Specifications
|
Product Name |
high remanence round countersunk magnets |
|
Magnet Grade |
N48 (Br ≥13.7 kGs, Hcj ≥12 kOe) |
|
Dimension |
25mm x 5mm x (5mm hole) |
|
Dimensional Tolerance |
+/-0.05 |
|
Operating Temperature |
≤80°C (High-temp versions available) |
|
Density |
≥7.5 g/cm³ |
|
Surface Magnetic Field |
3,500 Gs |
|
Magnetic Flux |
2.0 mWb (Fluxmeter-tested) |
Surface Treatment & Coating Technology
To enhance these precision engineered high energy density high strength Countersunk neodymium magnets' corrosion resistance, surface quality, and magnetic stability, the following treatments are used:
Edge Reinforcement: Laser cladding with nickel-based alloy at magnet seams (prevents electrochemical corrosion)
Edge Rounding: Reduces magnetic field distortion
Default Coating: Triple layer Ni-Cu-Ni (customizable)
Standard Thickness: Ni (3μm) + Cu (5μm) + Ni (4μm)
Optional Coatings: Gold or silver plating for better conductivity and corrosion resistance
Packaging & Transportation
Packaging Steps
Magnet Orientation Control:
Magnets are aligned and fixed to reduce internal magnetic stress.
Layered Separation:
Non-magnetic spacers are used between layers to avoid collision.
Anti-Corrosion Protection:
Vacuum bags or desiccants are added for humidity-sensitive applications.
Reinforced Carton Packing:
High-strength cartons or wooden cases are selected based on weight.
Transport Compliance Check:
Packaging is verified against magnetic field limits if required.
Summary
This process ensures structural stability and magnetic performance throughout logistics and handling.
Usage Precautions?
⚠ Safety & Handling Guidelines
● Handle gently: Neodymium magnets are hard but fragile. Sudden impact or dropping may cause cracking or chipping.
● Prevent personal injury: Separate magnets by sliding them sideways. Never pull them apart directly or use excessive force.
● Verify magnetic orientation: Confirm polarity before installation to avoid improper assembly or equipment damage.
● Proper storage conditions: Store magnets in a clean, dry environment. Avoid exposure to moisture, chemicals, or corrosive media.
● Magnetic interference caution: Keep magnets away from sensitive electronic devices, magnetic storage media, and medical implants.
FAQ
Q1. How does coating failure affect long-term magnet performance?
Answer:Coating failure exposes NdFeB material to moisture and oxygen, leading to corrosion along grain boundaries. This can cause gradual magnetic degradation, even if initial performance appears unchanged.
Q2. Why are NdFeB magnets brittle despite their high strength?
Answer:NdFeB magnets possess high hardness but low fracture toughness. They resist deformation but fracture easily under impact, requiring careful handling and protective packaging.
Q3. How important is magnetization tooling quality?
Answer:Magnetization tooling determines field strength, uniformity, and saturation completeness. Poor tooling can lead to incomplete magnetization and inconsistent performance, especially for multipole or radial designs.
Contact Us：
Phone/WhatsApp/WeChat: +86 13829120676
Email: Info@jinconn.com
Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province, China.
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