China Disc Neodymium Magnet Factory | Fullzen Technology
Neodymium Disc Magnets
1. Material:
- Made from neodymium-iron-boron (NdFeB), the strongest type of permanent magnet available.
- Common grades include N35 to N52, indicating the magnetic strength (higher numbers mean stronger force).
2. Shape and Size:
- Circular disc shape with a wide range of diameters and thicknesses, typically thin and flat.
- Common sizes range from a few millimeters to several centimeters in diameter, with thicknesses from 1mm to over 10mm.
3. Coating:
- Neodymium magnets are prone to corrosion, so they are typically coated with protective layers such as:
- Nickel-copper-nickel (Ni-Cu-Ni): The most common, providing a shiny and durable surface.
- Zinc: Offers basic corrosion protection.
- Epoxy or rubber: Adds more resistance in wet or harsh environments.
We sell all grades of strong neodymium Disc magnets, custom shapes, sizes, and coatings.
FAQ
Axial: Poles on the flat faces of the magnet (e.g., disc magnets).
Diametric: Poles on the curved side surfaces (e.g., cylindrical magnets).
Radial: Magnetization radiates outward from the center, used in ring magnets.
Multipole: Multiple poles on one surface, often used in magnetic strips or motor rotors.
Through-Thickness: Poles on opposite thin sides of the magnet.
Halbach Array: Specialized arrangement with concentrated fields on one side.
Custom/Asymmetric: Irregular or specific patterns for unique applications.
standard N52 neodymium magnet with dimensions of 20 mm in diameter and 3 mm in thickness can reach a surface magnetic field strength of approximately 14,000 to 15,000 Gauss (1.4 to 1.5 Tesla) at its poles.
Materials:
NdFeB: Neodymium, iron, boron.
Ferrites: Iron oxide with barium or strontium carbonate.
Strength:
NdFeB: Very strong, with high magnetic energy (up to 50 MGOe).
Ferrites: Weaker, with lower magnetic energy (up to 4 MGOe).
Temperature stability:
NdFeB: Loses strength above 80°C (176°F); high temperature versions are better.
Ferrites: Stable up to about 250°C (482°F).
Cost:
NdFeB: More expensive.
Ferrites: Cheaper.
Brittleness:
NdFeB: Fragile and brittle.
Ferrites: More durable and less brittle.
Corrosion resistance:
NdFeB: Corrodes easily; usually coated.
Ferrites: Naturally corrosion resistant.
Applications:
NdFeB: Used in applications that require high strength in a small size (e.g., motors, hard disks).
Ferrite: Used in economical applications that require lower strength (e.g., speakers, refrigerator magnets).
Your Custom Custom Neodymium Magnets Project
Fullzen Magnetics has more than 10 years of experience in the design and manufacture of custom rare earth magnets. Send us a request for quote or contact us today to discuss your project's specialty requirements, and our experienced team of engineers will help you determine the most cost effective way of providing you with what you need.Send us your specifications detailing your custom magnet application.
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