Small Circle Ferrite Magnets for Promotion, Crafts and Hobbies, Strong Round Disc Circular Hard Sintered Ferrite Magnets, custom diameter disk small or big round ceramic magnets, Anisotropic or Isotropic Ferrite Circle Magnets China Supplier Factory Small Circle Ferrite Magnets for Promotion, Crafts and Hobbies Features: Part No.: HS-FDM Material: Permanent Magnet, Ferrite Magnet Shape: Disc, […]
Ø 16.8 x 4.4 mm Black Rubber Coated Neodymium Disc Magnet, Rubberised Disc Neo Magnet, Rubber Covered Round Office Neodymium Magnets, Strong Office Whiteboard or Refrigerator Waterproof Magnet
Ø 16.8 x 4.4 mm Black Rubber Coated Neodymium Disc Magnet Parameter:
Part No.: ONMD16.8-BR Series
Size: 16.8mm diameter x 4.4mm thick
Material: Neodymium (NdFeB)
Magnet Shape: Disc / Round
Grade: N38, N40, N42, N45, N48, N50
Max Operating Temp: 176ºF (80ºC)
Tolerances: ±0.01 x ±0.01 mm
Magnetization: Magnetized Axial Through Thickness (Poles on Flat Ends)
**Magnet size is prior to rubber coating
These neodymium magnets feature a rubber coating, which provides the following advantages:
Rust resistance even in wet surroundings
Protection of delicate surfaces, such as whiteboards and magnetic glass boards
Substantially higher magnetic adhesive force in shear direction than neodymium magnets of similar size
Sintered neodymium magnet is the most widely used type of permanent magnet. It’s made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure. Meanwhile, it is a type of rare earth magnets according to its raw material composition.
|Material||Sintered Neodymium Iron Boron, Rubber, Steel|
|Dimensions||Round / Rectangular||Customized|
|Pull Force||8 lbs — 50 lbs|
|Magnetization Orientation||Axial / Through Thickness|
|Magnetic Properties||Grade||Max. Operating Temperatures|
|Remanence(Br)||11,300 Gauss — 14,800 Gauss|
|Coercive Force(Hcb)||10,000 Oersted — 11,600 Oersted|
|Intrinsic Coercive Force(Hcb)||11,000 Oersted — 12,000 Oersted|
|Magnetic Energy Product (BH)||33M GOe — 53M GOe|
|Surface Treatment||Ni-Cu-Ni, Nickel, Zn|
How Sintered Ndfeb Magnets Are Graded?
Do you know sintered neodymium-iron-boron magnets are rated according to maximum energy product. Look at our Specifications of Neodymium Magnets Page, you will find a rule that grade number 35 in the middle of (BH) maximum value 33-36 MGOe. Therefore, higher values indicate stronger magnets, ranging from N35 up to N55.
And letters following the number indicate maximum operating temperatures (often the centigrade temperature), ranging from M (100℃), H (120℃), SH (150℃), UH (180℃), EH200℃) to AH (220℃). If there is no letters following like N42, then the maximum operating temperature is 80℃.
|Part No.||Magnet Grade||Magnet Shaped||Surface||Dimensions in mm|