Product Overview
The strong stability disc magnet is a high-performance permanent magnet featuring a Round disc design for secure mechanical fastening. It is manufactured using high-grade NdFeB material (e.g., N35–N52) and coated with triple-layer nickel plating (Ni-Cu-Ni), significantly improving corrosion resistance and surface durability. It is ideal for applications requiring both strong magnetic performance and robust mechanical mounting.
Technical Parameters
|
Product Name |
strong stability disc magnets |
|
Magnet Grade |
N40 (Br ≥ 13.2 KGs, Hcj ≥ 10.8 KOe) |
|
Dimensions |
D6x2 |
|
Dimensional Tolerances |
Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm |
|
Working Temperature |
≤ 80°C (custom high-temperature versions available) |
|
Density |
≥ 7.5 g/cm³ |
|
Surface Magnetic Field |
3000 Gauss (measured with TM-801 Gauss meter, Japan) |
|
Magnetic Flux |
2.3mWb (measured with fluxmeter) |
Manufacturing Process
● High-purity rare earth materials are melted and cast into alloy strips
● Alloy is crushed and milled into fine powder
● Powder is aligned in a magnetic field and pressed into shape
● Compacts are sintered and heat-treated to achieve required magnetic properties
● Final machining, magnetization, and performance testing
Application Fields
Consumer Electronics:
In Bluetooth speakers, earbuds, and microphones for sound generation
Inside smartphones, especially in vibration motors and closures.
▲ Motors and Sensors:
Used in rotor-stator assemblies in miniature motors and BLDC (Brushless DC) motors. Integrated into speed or position sensors (e.g., hall effect sensors).
▲ Medical Devices:
Found in hearing aids, magnetic therapy pads, and some surgical tools due to compact size and strong field.
Sensors & Detection Devices:
Magnetic sensors, reed switches, and position detectors.
Usage Precautions
△ Handling:
NdFeB magnets are hard yet brittle-avoid dropping, collision, or edge impact.
△ Safe Operation:
Strong magnetic force may cause pinching-slide magnets apart instead of forcing them.
△ Proper Installation:
Identify and align polarities correctly to ensure stable operation.
△ Storage Conditions:
Avoid high temperatures, humidity, and corrosive (acid/alkali) environments.
△ Magnetic Interference:
Keep magnets away from sensitive equipment like hard drives, IC cards, and pacemakers.
FAQ
Q1. How does operating temperature affect the long-term stability of NdFeB magnets?
Operating temperature directly impacts irreversible magnetic loss. Exceeding the recommended working temperature may cause partial demagnetization that cannot be recovered, even after cooling. Proper grade selection (e.g., H, SH, UH, EH) is critical for thermal stability.
Q2. What are the main differences between intrinsic coercivity (Hcj) and coercivity (Hc) in practical applications?
Hcj reflects a magnet's resistance to demagnetization under extreme conditions and is more relevant in high-temperature or high-load applications, while Hc represents resistance under normal operating environments. For motors and generators, Hcj is often the more critical parameter.
Q3. How does coating selection influence magnet performance and lifespan?
Coatings do not affect magnetic properties directly but are essential for corrosion resistance. Nickel-based coatings offer good mechanical durability, while epoxy or phosphating provides better protection in humid or chemically aggressive environments. Improper coating choice can significantly reduce service life.
♦ If you require samples, technical datasheets, or certifications such as MSDS, RoHS, ISO 9001, QC080000, IATF 16949, ISO 14001, or ISO 27001, our sales engineers are ready to assist you.
We're here to help!
Phone/WhatsApp/WeChat: +86 13829120676
Email: info@jinconn.com
Website: www.jinconnmagnet.com
Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong, China
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