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20 mm Diameter Black Epoxy Coated N52 Rare Earth NdFeB Ring Magnets Neodymium

Categories Neodymium Ring Magnets
Brand Name: Jinyu Magnet
Model Number: Ring MAGNET 028
Certification: ISO9001 , , ROHS
Place of Origin: Ningbo , China
MOQ: 1000 pcs
Price: $ 0.01 - 0.09 per PCS
Payment Terms: L/C, T/T, Western Union
Supply Ability: 300 Tons Per Month
Delivery Time: 7 - 15 days
Packaging Details: Standard Sea Pakage OR Air Package
Composite: NdFeB
Grade: N52
Shape: Ring
Size: Custom
Plating: Epoxy
Br: 1.44 - 1.48 T
HCj: ≥ 12 KOe
(BH)max: 50 - 52 MGOe
Working Temperature: 80 ℃
Tolerance: +- 0.05 mm
Tickness Range: 0.5 mm - 220 mm
Plating Avaliable: Ni , Zn , Epoxy , Sn , Cad , Ag , Gold , Al , Phosphating
Grade Avaliable: N35 - N52 (M , H , SH , UH , EH , AH)
Shape Available: Ring , Bar , Disc , Square , Arc , Complex Shape
Application: Industrial Magnet
Type: Neodymium Magnet
Experience: 20 Years
Warranty: Forever
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    • Product Details
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    20 mm Diameter Black Epoxy Coated N52 Rare Earth NdFeB Ring Magnets Neodymium

    Black Epoxy Coated N52 Industrial Rare Earth Permanent Magnet With 20 mm Diameter

    1. Ring Magnet Information

    What are neodymium magnets? Are they the same as "rare earth"?

    Neodymium magnets are a member of the rare earth magnet family. They are called "rare earth" because neodymium is a member of the "rare earth" elements on the periodic table. Neodymium magnets are the strongest of the rare earth magnets and are the strongest permanent magnets in the world.

    What are neodymium magnets made from and how are they made?

    Neodymium magnets are actually composed of neodymium, iron and boron (they are also referred to as NIB or NdFeB magnets). The powdered mixture is pressed under great pressure into molds. The material is then sintered (heated under a vacuum), cooled, and then ground or sliced into the desired shape. Coatings are then applied if required. Finally, the blank magnets are magnetized by exposing them to a very powerful magnetic field in excess of 30 KOe.

    How is the strength of a magnet measured?

    Gaussmeters are used to measure the magnetic field density at the surface of the magnet. This is referred to as the surface field and is measured in Gauss (or Tesla). Pull Force Testers are used to test the holding force of a magnet that is in contact with a flat steel plate. Pull forces are measured in pounds (or kilograms).

    What does the "N rating", or grade, of the neodymium magnets mean?

    The grade, or "N rating" of the magnet refers to the Maximum Energy Product of the material that the magnet is made from. It refers to the maximum strength that the material can be magnetized to. The grade of neodymium magnets is generally measured in units millions of Gauss Oersted (MGOe). A magnet of grade N42 has a Maximum Energy Product of 42 MGOe. Generally speaking, the higher the grade, the stronger the magnet.

    2. What is the difference between the different platings and coatings?

    Choosing different coatings does not affect the magnetic strength or performance of the magnet, except for our Plastic and Rubber Coated Magnets. The preferred coating is dictated by preference or intended application. More detailed specifications can be found on our Specs page.

    ♦ Nickel is the most common choice for plating neodymium magnets. It is actually a triple plating of nickel-copper-

    nickel. It has a shiny silver finish and has good resistance to corrosion in many applications. It is not waterproof.

    ♦ Black nickel has a shiny appearance in a charcoal or gunmetal color. A black dye is added to the final nickel plating

    process of the triple plating of nickelcopperblack nickel.

    NOTE: It does not appear completely black like epoxy coatings. It is also still shiny, much like plain nickel plated magnets.

    ♦Zinc has a dull gray/bluish finish, that is more susceptible to corrosion than nickel. Zinc can leave a black residue on

    hands and other items.

    ♦ Epoxy is basically a plastic coating that is more corrosion resistant as long as the coating is intact. It is easily scratched.

    From our experience, it is the least durable of the available coatings.

    ♦ Gold plating is applied over the top of standard nickel plating. Gold plated magnets have the same characteristics as

    nickel plated ones, but with a gold finish

    3. Specification About Ring Magnet

    ItemBlack Epoxy Coated N52 Industrial Rare Earth Permanent Magnet With 20 mm Diameter
    UsageIndustrial Magnet
    Delivery Time7-15 days After the Payment

    Plastic bag + Little White Box + 8 Holes Foam Box + Iron Sheet in air way + Big Canton Box

    4. Ring Magnetize Direction

    5. Other Available Products

    6. Our Service

    Ningbo Jinyu magnet Co.,Ltd locates in Ningbo,Zhejing province ,established in 1996.

    It is a high-tech enterprise and specialized in studying and resarch and applying NdFeB rare-earth permanent magnets.

    All the permanent magnets achieved the standard ISO9001,and RoHS.We have series of proprietary technology and complete localizationof equipment system.enabling multipe batches ,more varieties,more Grades of flexible production. Our main products include Sintered NdFeB permanent magnet,Bonded NdFeB permanent magnet,Ferrite and all kinds of AlNiCo ,Smco,magnetic components and so on.

    7. Our Advantages

    20 years‘ experience in the magnet manufaturing.

    ,ISO9001 and Rohs certificated.

    Our own factory.

    Stable quality with reasonable price:Zero after-sale quality problem.

    professional sales serve for you:completed product program for you.

    8. Trade & Market

    Main Markets:

    South Asia
    Eastern Asia
    Mid East
    South America
    Southeast Asia
    Southern Europe
    Eastern Europe
    Domestic Market
    Northern Europe
    North America
    Western Europe

    Total Annual Sales Volume:

    US$20 Million - US$50 Million

    Export Percentage:

    70% - 80%

    9. Product Detailed Picture

    Quality 20 mm Diameter Black Epoxy Coated N52 Rare Earth NdFeB Ring Magnets Neodymium for sale
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