Epoxy Coating Ring NdFeB Micro Permanent Magnet, Sintered Neodymium Iron Boron Micro Tiny Ring Magnets
Specifications:
Materials
NdFeB, Grade: N30-N55, N30M- 52M, N30H-52H, N30SH-48SH, 30UH-42UH, 28EH-40EH, N28AH-35AH
Shape
Ring, Customized shapes for Neodymium Magnets are available.
Dimensions
Radius: 3.64mm
Width: 5.54mm
Thickness: 1.24mm
Accept Customized
Tolerances
Radius: -0.04 to +0.04mm
Width: -0.1 to +0.06mm
Thickness: -0.03 to +0.03mm
Accept Customized
Coating
Black epoxy, Customized coating are available. other: Ni-Cu-Ni, Nickel, Zn, Gold, Silver, Copper, Epoxy, Chemical, PTFE, Parylene, Everlube, Passivation and more
Capacity
more than 1000K pieces/month
Application
voice coil motors
Introduction
Neodymium Magnets are widely used in many fields, such as motors, sensors,microphones, wind turbines, wind generators, VCMs in hard disk drives, printer,switchboard, loudspeakers, magnetic separation, magnetic hooks, magnetic holder,magnetic chuck, common daily use, and so on.
All kinds of micro permanent magnet ring is widely used in watches, optical communication, medical, precision machinery and other industries. Thin wall long hole features Micro NdFeB Ring is my company’s products, inner hole length to diameter ratio can reach those days, products can be thin wall thickness to 0.2 mm. Production, quality stable and reliable, and has been supporting in many world famous companies products.
Product details | |||||
Project | Outer diameter（mm） | The inner diameter（mm） | highly（mm） | Direction of magnetization | Material |
Basic dimensions | φ0.8-φ10.0 | φ0.2-φ3.0 | 0.2-15 | Custom | SmCo, NdFeB, Ferrite, Alnico and etc. |
Tolerance | ±0.005-±0.05 | ±0.01-±0.1 | ±0.005-±0.05 | ±1° | |
Sintered Ring NdFeB Micro Permanent Magnet – Remanence, coercivity, Curie temperature, and BH energy product properties of sintered NdFeB magnets characterize this type of magnets as those that have high strength and general application potential. The remanence of a ferromagnetic material is the magnitude of the magnetic field that the material can sustain when it is no longer subject to an external magnetic field. The coercivity of a permanent magnet is its ability to maintain its magnetic field in an external field applied in the reverse direction. As the temperature of a material increases, the particles begin to excite and move randomly; this effect can destroy the magnetic properties of a permanent magnet. The temperature at which the magnet loses its properties is different for each material and is called the Curie temperature. The BH product is the multiplication of the remanent magnetic field and the coercive magnetic field that are required to reduce the remanence to zero. This quantity describes the energy of a volume of magnetic material.
Maximal working temperature is about 80°C, because of Hcj sensitivity to temperature (0.66% every degree C).
The induction losses are reversible so far we stay in the limit of working temperature of the material. It is 80°C in open circuit with standard grade. There are several NdFeB grades up to 180°C. tube neodymium micro magnet
20 x 2mm Neodymium Iron Boron Disc Magnets N52 Nickel, Super Strong Rare Earth Sintered NdFeB Disk Round Magnet for Toy and Craft, Neodymium Iron Boron, Nickel Coated Neodymium Disc Permanent Magnets China Supplier 20 x 2mm Neodymium Iron Boron Disc Magnets N52 Nickel Technical Specifications: Item: NDN52-2002 Grade: N52 Material: Neodymium (NdFeB) Plating: Nickel Shape: […]
12 x 4mm NdFeB Discmagnet N48 Gold, Super Strong Rare Earth Sintered NdFeB Disk Round Magnet for Toy and Craft, Neodymium Iron Boron, Golden Coated Neodymium Disc Permanent Magnets China Supplier 12 x 4mm NdFeB Discmagnet N48 Gold Technical Specifications: Item: NDN48-1204-G Grade: N48 Material: Neodymium (NdFeB) Plating: Gold Shape: Disk, Round, Disc, Circular, Cylinder Dimension: […]
18mm x 4mm Craft Disc Neodymium Magnet N42 Ni, Super Strong Rare Earth Sintered NdFeB Disk Magnet for Toy and Craft, NiCuNi Coated Neodymium Disc Permanent Magnets China Supplier 18mm x 4mm Craft Disc Neodymium Magnet N42 Ni Technical Specifications: Item: NDN42-1804 Grade: N42 Material: Neodymium (NdFeB) Plating: Ni Shape: Disc, Disk, Round Dimension: Total Diameter […]
16mm x 2mm Dic NdFeB Toy Magnet N42 Ni, Super Strong Rare Earth Sintered NdFeB Disk Magnet for Toy and Craft, NiCuNi Coated Neodymium Disc Permanent Magnets China Exporter 16mm x 2mm Dic NdFeB Toy Magnet N42 NiTechnical Specifications: Item: NDN42-1602 Grade: N42 Material: Neodymium (NdFeB) Plating: Ni Shape: Disc, Disk, Round Dimension: Total Diameter (D): […]