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Circle Neodymium Magnets

Name: Circle Neodymium Magnets - China Circle Neodymium Magnets Manufacturers Suppliers Factory - Everbeen Magnet Electron
Brand: Everbeen
SKU: 236932975

Circle Neodymium magnets (Nd-Fe-B) is one of the highest property and strongest permanent magnet by now, are made through powder metallurgy manufacturing techniques. They are mainly composed of neodymium (32%), iron(64%), boron(1%), and a few quantity rare earth material, such as Dy, Tb, Co, Nb, Ga, Al, Cu, etc.

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Detailed Product Description

Circle neodymium magnets are powerful rare-earth magnets made from neodymium (Nd), iron (Fe), and boron (B). They are known for their exceptional magnetic strength, compact size, and wide range of industrial and commercial applications. Manufactured through sintering processes, these magnets often feature nickel (Ni), zinc (Zn), gold (Au), or epoxy coatings to improve corrosion resistance and durability.

Key Features of Circle Neodymium Magnets

✅ Extremely High Magnetic Strength – Maximum energy product (BHmax) up to 52 MGOe, making them the strongest permanent magnets available.
✅ Compact and Lightweight – Delivers powerful magnetic force in a small size, outperforming ferrite and AlNiCo magnets.
✅ Various Sizes Available – Diameter ranges from 1mm to 200mm, with customizable thickness.
✅ Surface Coating for Protection – Nickel, zinc, and epoxy coatings enhance corrosion resistance and extend lifespan.

Application for Circle neodymium magnets

1. Electronics & Electrical Equipment

Speakers & Audio Devices – Used in headphones, microphones, and high-fidelity speakers to enhance sound quality.

Motors & Generators – Essential in brushless DC motors (BLDC), servo motors, and high-performance generators.

Magnetic Sensors – Key components in Hall effect sensors and encoders for precision detection.

Magnetic Charging Connectors – Applied in wireless charging systems and snap-on charging cables.

2. Mechanical & Industrial Applications

Magnetic Couplings – Used in torque transmission systems, pumps, and mixers.

Holding & Lifting Magnets – Powerful lifting solutions for ferrous materials in industrial settings.

Magnetic Separation – Deployed in recycling plants to extract metal particles from waste.

3. Home & Office Solutions

Magnetic Closures – Common in cabinet doors, handbags, and jewelry clasps.

Whiteboard & Refrigerator Magnets – Ideal for holding notes, pictures, and office supplies.

Magnetic DIY & Crafts – Widely used in custom crafts, magnetic boards, and creative projects.

4. Medical & Scientific Applications

MRI Machines – Integral in medical imaging for magnetic resonance imaging (MRI) technology.

Magnetic Therapy – Used in therapeutic devices for pain relief and blood circulation improvement.

Scientific Research – Applied in particle accelerators and laboratory experiments.

Main Process Equipment for neodymium magnets

Why Choose Circle Neodymium Magnets?

🔹 Unmatched Strength – The strongest permanent magnet available.
🔹 Versatile Applications – Suitable for industrial, commercial, and household use.
🔹 Long-Lasting Durability – Coated for enhanced protection against wear and corrosion.
🔹 Customizable Options – Various shapes, sizes, and grades (N35-N52) available.

We also can supply High OperatingTemperature neodymium magnets with mounting holes, please inquiry Everbeen magnet according to your design and application requests

Grade	Br mt(KG)	Hcb Koe(KA/m)	iHc Koe(KA/m)	(BH)max KJ/m3 (MGOe)	TW℃
30SH	1080-1130(10.8-11.3)	≧10.0(≧796)	≧21(≧1672)	223-247(28-31)	150
33SH	1130-1170(11.3-11.7)	≧10.6(≧844)	≧21(≧1672)	247-263(31-33)	150
35SH	1170-1210(11.7-12.1)	≧11.0(≧876)	≧21(≧1672)	263-287(33-36)	150
38SH	1210-1250(12.1-12.5)	≧11.4(≧907)	≧21(≧1672)	287-310(36-39)	150
40SH	1250-1280(13.2-13.8)	≧11.8(≧939)	≧21(≧1672)	302-326(38-41)	150
42SH	1280-1320(12.8-13.2)	≧11.8(≧939)	≧21(≧1672)	320-343(40-43)	150
45SH	1320-1380(12.8-13.2)	≧12.6(≧1003)	≧21(≧1672)	342-366(43-46)	150

Please review various customize thin neodymium magnets

FAQ

Q1: Can Neodymium Iron Boron magnets be laser engraved with text or logos?

Yes, neodymium iron boron (NdFeB) magnets can be laser engraved with text or logos, but certain factors need to be considered. Since NdFeB magnets are typically coated with materials like nickel, zinc, epoxy, or gold to prevent corrosion, laser engraving is usually performed on the coating rather than the raw magnet surface. Among these, nickel and epoxy coatings respond well to laser marking, producing clear and durable results. Direct engraving on the bare magnet is not recommended because NdFeB is brittle and reactive, which could lead to surface damage or reduced magnetic performance.

Laser engraving is commonly used for branding, product identification, or traceability by marking logos, serial numbers, or QR codes. It offers a permanent and precise solution without affecting the magnet's dimensions. However, it's important to use proper laser settings to avoid damaging the protective coating or demagnetizing the magnet. Working with professionals experienced in laser marking on coated magnets ensures high-quality results. In summary, while NdFeB magnets can be laser engraved, careful attention to coating type and laser parameters is crucial for success.

Q2: Why Are Neodymium Magnets Brittle?

Neodymium magnets, despite their exceptional strength, are inherently brittle due to their material composition and manufacturing process. Let us vies the key reasons:

1. Composition of Neodymium Magnets

Neodymium magnets are made from a rare-earth alloy primarily composed of neodymium (Nd), iron (Fe), and boron (B). This combination forms a metallic intermetallic compound (Nd₂Fe₁₄B), which has high magnetic properties but lacks the ductility and toughness of traditional metals like steel.

2. Crystal Structure

The Nd₂Fe₁₄B compound has a complex tetragonal crystal structure, which contributes to its extreme hardness but also makes it prone to fracture under stress. Unlike materials with more flexible atomic arrangements, neodymium magnets lack the ability to deform plastically, meaning they crack or shatter instead of bending under pressure.

3. Sintering Process

Most neodymium magnets are produced through a powder metallurgy process, where fine alloy powder is pressed, sintered, and magnetized. This process results in a densely packed but grainy microstructure, which enhances magnetic performance but reduces mechanical strength. The grain boundaries act as weak points where fractures can initiate and propagate.

4. Lack of Malleability

Unlike ductile metals, neodymium magnets do not exhibit plastic deformation-they do not stretch or bend before breaking. When subjected to mechanical stress, such as impact, bending, or excessive pressure, they tend to snap or shatter rather than flex.

5. Surface Coatings and Protection

To improve durability, neodymium magnets are often coated with nickel, zinc, epoxy, or gold to protect against corrosion and minor mechanical damage. However, these coatings do not prevent the core brittleness, and improper handling can still lead to cracks or breakage.

Conclusion

Circle neodymium magnets offer unparalleled magnetic strength, durability, and versatility, making them a top choice for industries ranging from electronics and engineering to healthcare and home applications. Their small size yet powerful magnetic force makes them indispensable in modern technology.

Looking for high-quality circle neodymium magnets? Contact us today for custom orders, bulk purchases, and expert consultation!

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