Product overview
This is a black epoxy coating round countersunk magnet, 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 ring-shaped design meets high-performance magnetic needs in compact spaces, making it widely applicable in high-end electronic devices, audio equipment, premium perfume bottle caps, and other fields.
The magnet is manufactured using advanced wire cutting, center-less grinding, and double-disc grinding processes, ensuring neat edges and uniform dimensions. Surface treatment includes multi-layer metal coating (Ni+Cu+Ni) or optional Ni coating, effectively preventing oxidation and corrosion from environmental factors, thereby extending the product's service life.
High Strength High Precision Cone bowl NdFeB Magnets N35-N52 These NdFeB arc magnets exceeded our expectations in high-speed motor applications. The strong magnetic force and precision arc shape made assembly seamless, and the epoxy coating provided excellent durability against corrosion. Ideal for our brushless motor production line
Technical Specifications
|
Product Name |
black epoxy coating round countersunk magnets |
|
Material Grade |
N48 (Br ≥ 14.2 kGs, Hcj ≥ 12 kOe) |
|
Dimension |
Customize |
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Dimensional Tolerance |
±0.05 mm (length/width/thickness) |
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Operating Temperature |
≤80℃ (high-temperature versions customizable) |
|
Density |
≥7.5 g/cm³ |
|
Surface Magnetic Field |
3200 ± 200 Gauss (measured with Japanese TM-801 Gauss meter) |
|
Magnetic Flux Value |
2.3 mWb (measured with fluxmeter) |
Manufacturing Process
The production of our high remanence cube magnet is carried out through a thoroughly optimized and highly automated process. Each stage is precisely managed to ensure exceptional product consistency, superior magnetic performance, and long-term durability across a wide range of applications.
Pulse Magnetization
Our production line is equipped with advanced pulse magnetization systems capable of generating powerful, stable magnetic fields. very magnet is energized to its optimal magnetic state for reliable use in demanding industrial systems.
Coating & Corrosion Protection
Due to the inherent corrosion sensitivity of NdFeB materials, we offer a range of proven surface protection solutions, including Ni-Cu-Ni, zinc plating, epoxy coating, and Parylene coating, designed to meet the corrosion resistance requirements of different operating environments.
Our coating design considers not only corrosion performance, but also coating thickness, adhesion strength, and its impact on magnetic air gaps. Through controlled surface preparation and coating processes, the risk of pinholes and micro-cracks is minimized, ensuring long-term reliability under high humidity, salt spray, and thermal cycling conditions. For specific applications, we provide coating selection recommendations based on actual environmental and operational requirements.
Why Choose Us
Dongguan Jinconn New Material Holdings Co., Ltd., a publicly listed rare earth permanent magnet manufacturer, excels in engineering, manufacturing and industrial application development. Headquartered in Dongguan, we have a well-structured production base and stable capacity to serve global customers.
Continuous investment in advanced equipment and process optimization ensures high batch consistency, traceability and production stability, ideal for industrial, energy and high-reliability applications.
We focus on long-term value, stable supply and shared responsibility in partnerships. Strict compliance with international standards empowers global customer confidence.
Our strengths go beyond products, encompassing engineering collaboration, reliable execution and commitment to sustainable partnerships.
FAQ
How strong are NdFeB magnets compared to other magnets?
NdFeB magnets are significantly stronger than ferrite and AlNiCo magnets of the same size, offering higher magnetic energy density and enabling compact, lightweight designs.
What coatings are available for NdFeB magnets?
Common coatings include NiCuNi (nickel), epoxy resin, zinc, gold, and passivation treatments. Coating selection depends on corrosion resistance, appearance, and operating environment.
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