Product overview & application scenarios
Countersunk disc magnets are easy to install and provide a strong magnetic hold, making them suitable for a wide range of applications. In industrial environments, they're often used to secure safety covers, fix metal plates in place, or hold components steady during use. Around the house, they work well for magnetic latches, organizing garage tools, or keeping heavy doors closed. In retail, they're commonly used to mount signs and displays where strength and flexibility are important. Their durable design and wide range of uses make them a practical solution for many everyday tasks.
Material Neodymium (NdFeB)
|
Product Name |
countersunk disc magnets |
|
Magnetic Grade |
N42 (Br ≥ 13.5 kGs, Hcj ≥ 12 kOe) |
|
Thickness |
D 8mm x 3mm |
|
Countersunk Hole |
3mm |
|
Dimensional Tolerance |
Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm |
|
Magnetisation Direction |
Axially Magnetised |
|
Polarity |
Countersunk Face North |
|
Operating Temperature |
≤80°C (high-temp version available) |
|
Density |
≥7.5 g/cm³ |
|
Surface Magnetic Field |
3800 ±200 Gauss (measured with TM-801 Gauss meter) |
|
Magnetic Flux |
2.3 mWb (measured with fluxmeter) |
♦ 2.1 Magnet Grade: N42
These countersunk disc magnets offer a balanced combination of strength and versatility, with a maximum energy product of around 42 MGOe. Well-suited for various applications, including motors, sensors, and precision assemblies, they deliver consistent magnetic performance. Their reliable field strength makes them a preferred choice for consumer electronics and technical equipment alike. Widely adopted across industries, N42 magnets are valued for their dependable and efficient performance.
Quality Control for NdFeB Magnets
- Inspection from raw material to finished product
- Verification of magnetic performance and dimensional accuracy
- Reliable surface coating inspection for corrosion protection
- Final inspection to ensure conformity with customer specifications
- Full traceability and documented inspection records
Packaging & Transportation
Step 1: Appearance and dimension inspection
Step 2: Magnetic shielding or spacing protection
Step 3: Sealed or vacuum inner packaging
Step 4: Foam-protected carton packing
Step 5: Export pallet packing for shipment
FAQ
Q1. How do vibration and cyclic loading affect long-term magnet reliability?
Answer:While magnetic properties may remain stable, repeated vibration can propagate micro-cracks, leading to coating failure and corrosion ingress. Structural integrity and coating adhesion are therefore as important as magnetic parameters in dynamic applications.
Q2. Why is polarity marking sometimes unreliable after storage?
Answer:Marking ink degradation, surface oxidation, or coating color variation can reduce visibility. For critical assemblies, laser marking, mechanical notches, or magnetic scanning verification is recommended instead of ink-based markings.
Q3. How is long-term flux loss distinguished from production variation?
Answer:Baseline flux data from initial inspection is compared with post-aging or post-application measurements under controlled conditions. Traceability and consistent test fixtures are essential to separate natural degradation from initial batch variation.
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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