Sintered Neodymium Magnets

Sintered Neodymium Magnets, Sintered neodymium-iron-boron (Nd-Fe-B) magnets, Rare Earth NdFeB Magnets, Neodymium Permanent Magnets

HangSeng Magnetech uses only licensed neodymium and licensed magnet materials for all applications.

Sintered neodymium-iron-boron (Nd-Fe-B) magnets are licensed rare earth magnets which are the most powerful commercialized permanent magnets available today, with maximum energy product ranging from 26 MGOe to 52 MGOe. Neodymium Iron Boron is the third generation of permanent magnet developed in the 1980s. It has a combination of very high remanence and coercivity and comes with a wide range of grades, sizes and shapes. With its excellent magnetic characteristics Nd-Fe-B offers  flexibility for new designs or as a replacement for traditional magnet materials such as ceramic, Alnico and Sm-Co for achieving higher efficiency and more compact devices.

Sintered Neodymium Magnets

Sintered Neodymium Magnets

A powder metallurgy process is used in producing sintered Neodymium magnets. Although sintered Neodymium is mechanically stronger than Samarium Cobalt magnets and less brittle than other magnets, it should not be used as a structural component. Selection of Nd-Fe-B is limited by temperature due to its irreversible loss and moderately high reversible temperature coefficient of Br and Hci. The maximum application temperature is 200 °C for high coercivity grades. Nd-Fe-B magnets are more prone to oxidation than any other magnet alloys. If Nd-Fe-B magnet is to be exposed to humidity, chemically aggressive media such as acids, alkaline solutions salts and harmful gases, coating is recommended. It is not recommended in a hydrogen atmosphere.

Applications of Neodymium Magnets

  • Magnetic separators
  • Linear actuators
  • Microphone assemblies
  • Servo motors
  • DC motors (automotive starters)
  • Computer rigid disc drives, printers and speakers

Attributes of Neodymium Material

  • Very high resistance to demagnetization
  • High energy for size
  • Good in ambient temperature
  • Moderately priced
  • Material is corrosive and should be coated for long term maximum energy output
  • Low working temperature for heat applications, but higher levels of heat resistance materials are being introduced periodically

Tolerances

For as-pressed material, tolerance on the thickness (direction of magnetization) is +/– .005”. Other dimensions are +/– 2.5% or +/– .005”, whichever is greater.

According to International Magnetics Association/Magnet Materials Producers Association (IMA/MMPA) standards, visual imperfections such as hairline cracks, porosity and minor chips are commonly found in sintered magnets. A chipped edge is considered acceptable if no more than 10% of the surface is missing. Cracks are acceptable as long as they do not extend across more than 50% of the pole’s surface.

Machining

Since neodymium magnet material is prone to chipping and cracking, it does not lend itself to conventional machining methods. However, neodymium can be abrasively ground, but only with the use of liberal amounts of coolant. The coolant minimizes heat fracturing and the risk of fires caused by oxidized grinding dust.

Magnetizing and Handling

Neodymium magnets are very brittle and very strong magnetically. Therefore, it is crucial to handle these magnets with extreme care to avoid personal injury and damage to the magnets. Fingers can be severely pinched between attracting magnets. Magnets can chip if allowed to “jump at” an attracting object. It is highly recommended that when constructing rare earth magnetic assemblies, they be magnetized after assembly.

Neodymium Round Countersunk Magnet

Neodymium Round Countersunk Magnet

Neodymium Round Countersunk Magnet, Axial magnetization Neodymium Countersink Magnets, Neodymium Iron Boron Disc N38 Thickness Magnetization, Sintered NdFeB Disc, NIB, Neo holding magnets, Industrial Permanent Magnet China Manufactory Neodymium Round Countersunk Magnet information: Size :  8mm hole magnet / Customized Shape disc, round (countersunk) Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 […]

NdFeB Round Magnet

NdFeB Round Magnet

NdFeB Round Magnet, Axial magnetization 50X30 Neodymium Magnets, Neodymium Iron Boron Disc, N52 Thickness Magnetization Sintered NdFeB Disc, NIB, Neo Discmagnets, Industrial Permanent Magnet China Manufactory NdFeB Round Magnet information: Size : D50mm * 30mm / Customized Shape disc, round Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 N52(other grade need […]

Anisotropic Sintered Neodymium Ring

Anisotropic Sintered Neodymium Ring

Anisotropic Sintered Neodymium Ring, Multi Poles Radial Diametrical Neodymium Rings, N45SH Radially Orientated Sintered NdFeB Rings, Multipole Sintered NdFeB, Industrial Ring Permanent Magnet China Manufactory Anisotropic Sintered Neodymium Ring information: Size : Customized Shape ring Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 N52(other grade need to production ) Coating : […]

Multi Poles Radial Diametrical Neodymium Rings

Multi Poles Radial Diametrical Neodymium Rings

Multi Poles Radial Diametrical Neodymium Rings, N45SH Radially Orientated Sintered NdFeB Rings, Multipole Sintered NdFeB Tube Magnets, anisotropic sintered neodymium iron boron radiation ring, Permanent Industrial Tube Magnet China Factory Multi Poles Radial Diametrical Neodymium Rings information: Size : Customized Shape ring / tube magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 […]

Radially Orientated Sintered NdFeB Rings

Radially Orientated Sintered NdFeB Rings

Radially Orientated Sintered NdFeB Rings, Multipole Sintered NdFeB Ring Magnets N52, anisotropic sintered neodymium iron boron radiation ring for Motors, Permanent Industrial Tube Magnet China Factory Radially Orientated Sintered NdFeB Rings information: Size : Customized Shape ring / tube magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 N52(other grade need […]

Multipole Sintered NdFeB Ring

Multipole Sintered NdFeB Ring Magnets

Multipole Sintered NdFeB Ring Magnets, N52 Multipole Ndfeb Ring Magnet, Powerful Sintered Neodymium Magnetic Ring, anisotropic sintered neodymium iron boron radiation ring for Motors, Speakers and Sensors, Permanent Industrial Magnet China Factory Multipole Sintered NdFeB Ring Magnets information: Size : Customized Shape ring / tube magnet Raw material : Permanent Neodymium Magnet Grade : N35 […]

Radially Magnetized Ring Magnet

Radially Magnetized Ring Magnet

Radially Magnetized Ring Magnet, N52 Ndfeb Ring Tube Magnet, Powerful Sintered Neodymium Magnetic Ring, Super Multipole ring magnet, Neodymium-iron-boron TUBE, Speaker and Sensor Permanent Industrial Magnet China Factory Radially Magnetized Ring Magnet information: Size : D30mm*d8mm*h35mm / Customized Shape ring / tube magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 […]

N50 Ndfeb Magnet Ring Tube

N50 Ndfeb Magnet Ring Tube

N50 Ndfeb Magnet Ring Tube, Powerful Sintered Neodymium Magnetic Ring, Super Magnets, Neoflux Rare Earth Neodymium Magnetic Alloy, Neodymium-iron-boron Speaker and Sensor Permanent Industrial Magnet China Factory N50 Ndfeb Magnet Ring Tube information: Size : D30mm*d8mm*h35mm / Customized Shape ring / tube magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 […]

Sintered Neodymium Magnetic Ring

Powerful Sintered Neodymium Magnetic Ring

Powerful Sintered Neodymium Magnetic Ring, NdFeB Super Magnets, Neoflux N52 Rare Earth Neodymium Magnetic Alloy, Neodymium-iron-boron Rare Earth Magnet, Speaker and Sensor Magnet, Customized Ring NdFeB China Factory Powerful Sintered Neodymium Magnetic Ring information: Size : D24mm*d18mm*h16mm / Customized Shape ring magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 N52(other grade […]

Ring-shaped NdFeB Super Magnets

Ring-shaped NdFeB Super Magnets

Ring-shaped NdFeB Super Magnets, Neoflux N52 Rare Earth Neodymium Magnetic Alloy Ring, Powerful Neodymium Ring Permanent Magnet, Neodymium-iron-boron Sintered Neodymium Rare Earth Magnet, Speaker and Sensor Magnet, Customized Ring NdFeB Ring-shaped NdFeB Super Magnets information: Size : D26mm*d18mm*h16mm / Customized Shape ring magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 N52(other […]

n52 Ring Rare Earth Neodymium Magnet

N52 Rare Earth Neodymium Magnet Ring Shape

N52 Rare Earth Neodymium Magnet Ring Shape, Powerful Neodymium Ring Permanent Magnet, Super Stong Ring Sintered Neodymium Rare Earth Magnet, Speaker and Sensor Magnet, Customize ring NdFeB magnets N52 Rare Earth Neodymium Magnet Ring Shape information: Size : D20mm*d14mm*h14mm / Customized Shape ring magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 […]

Neodymium Permanent Ring Magnets

Neodymium Permanent Ring Magnets

Neodymium Permanent Ring Magnets, Neodymium Ring Speaker Magnet, Super Stong Ring Neodymium Rare Earth Magnet, Speaker and Sensor Magnet, custom-made ring NdFeB magnets Neodymium Permanent Ring Magnets information: Size : D12mm*d8mm*h3mm / Customized Shape ring magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 N52(other grade need to production ) Coating : […]

Neodymium Ring Speaker Magnet

Permanent Neodymium Ring Speaker Magnet

Permanent Neodymium Ring Speaker Magnet, Super Stong Ring Neodymium Rare Earth Magnet, N52 Strong NdFeB Magnet Composite Ring Shape Magnetic Ring, NdFeB Rings, Speaker and Sensor Magnet, custom-made NdFeB magnets ring Permanent Neodymium Ring Speaker Magnet Magnet information: Size : D36mm*d28mm*h6mm / Customized Shape ring magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 […]

Ring Neodymium Rare Earth Magnet

Super Stong Ring Neodymium Rare Earth Magnet

Super Stong Ring Neodymium Rare Earth Magnet, N52 Ring Permanent Magnet, NdFeB Rings, Neodymium Large Ring Speaker Magnet, neodymium iron boron ring Super Stong Ring Neodymium Rare Earth Magnet information: Size : D25mm*d16mm*h5mm / Customized Shape ring magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 N52(other grade need to production ) Coating : […]

Ring Permanent Neodymium Magnet

Super Ring Permanent Neodymium Magnet

Super Ring Permanent Neodymium Magnet, N50 Ring Magnet, NdFeB Rings, Neodymium Large Ring Speaker Magnet, neodymium iron boron ring, Premium Neodymium ring magnets N50 Super Ring Permanent Neodymium Magnet information: Size : D60mm*d30mm*h8mm / Customized Shape ring magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 N52(other grade need to production ) Coating : Zn […]

Large Neodymium N52 Ring Magnet

Large Neodymium N52 Ring Magnet

Large Neodymium N52 Ring Magnet, NdFeB Rings,  Ring Neodymium  rare earth permanent magnet, neodymium iron boron ring, permanent super magnetic material, Premium Neodymium ring magnets N52 Large Neodymium N52 Ring Magnet information: Size : 150×13-50mm / Customized Shape ring magnet Raw material : Permanent Neodymium Magnet Grade : N35 N38 N42 N50 N52(other grade need to production ) Coating […]

Block Neodymium Magnets

Block Neodymium Magnets

Block Neodymium Magnets, Rare Earth Neodymium Block Magnets, Powerful Rectangular NdFeB Magnets Block Neodymium Magnets (Neo block / rectangle / square) are among the most powerful permanent magnets available. Our range is suited to a wide range of applications, including magnetic separators in the food industry, flow control systems & water conditioning to name but a few. The multi-purpose Rare Earth neodymium […]

Disc Neodymium Magnets

Disc Neodymium Magnets

Disc Neodymium Magnets, Neodymium Round Magnets, Small and Strong Disk NdFeB Magnet Disc Neodymium Magnets (Neo disc / disk), are the perfect marriage of small size and maximum power or strength. HangSeng Magnetics provides a large variety of Neodymium disc magnets in a variety sizes and with several coatings such as Nickel, zinc or Gold  for protection […]

Cylinder Neodymium Magnets

Cylinder Neodymium Magnets

Cylinder Neodymium Magnets, Powerful Rod Magnets, Strong NdFeB Cylindrical Magnets Cylinder Neodymium Magnets (Neo cylinders/rods/bars) are ideal for applications requiring the embedding of magnets with more than average length eg: acrylic signage, picture frames, joinery. With superior size to strength ratio, Rare Earth cylinders are suitable for a wide range of applications. HangSeng Magnetics neodymium cylinders/rods come in […]

Ring Neodymium Magnets

Ring Neodymium Magnets

Ring Neodymium Magnets, Rare Earth Neodymium Ring Permanent Magnet, Neo Rings Ring Neodymium Magnets, also known as Rare Earth neodymium ring magnets (Neo rings / tubes), are often used in joinery and shop-fitting as they may be recessed and screwed into position. Although not as strong as Neodymium discs, the hole in centre of the ring magnet ensures great […]