Sintered Neodymium 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.

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.

 

Super Strength NdFeB Magnet Ring

Super Strength NdFeB Magnet Ring

Super Strength NdFeB Magnet Ring Ø20 x Ø4 x 7 mm N35, Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Neo Ring Magnet, Sintered NdFeB magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Super Strength NdFeB Magnet Ring Ø20 x Ø4 x 7 mm N35 Feature: Material Neodymium Plating  Nickel […]

Stock Neodymium Magnets Ring

Stock Neodymium Magnets Ring

Stock Neodymium Magnets Ring Ø18 x Ø10 x 4 mm N40, Axial Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Neo Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Stock Neodymium Magnets Ring Ø18 x Ø10 x 4 mm N40 Feature: Material Neodymium […]

Bulk Wholesale Ring Permanent Magnets

Bulk Wholesale Ring Permanent Magnets

Bulk Wholesale Ring Permanent Magnets Ø16 x Ø12.5 x 8 mm N42, Axial Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Neo Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Bulk Wholesale Ring Permanent Magnets Ø16 x Ø12.5 x 8 mm N42 Feature: […]

Sintered NdFeB Rings

Sintered NdFeB Rings

Sintered NdFeB Rings Ø15 x Ø10 x 2 mm N40, Axial Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Neo Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Sintered NdFeB Rings Ø15 x Ø10 x 2 mm N40 Feature: Material Neodymium Plating  Nickel […]

Super Strong Magnetic Ring

Super Strong Magnetic Ring

Super Strong Magnetic Ring Ø15 x Ø8 x 6 mm N42, Axial Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Neo Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Super Strong Magnetic Ring Ø15 x Ø8 x 6 mm N42 Feature: Material Neodymium […]

Neodymium Permanent Ring Magnet

Neodymium Permanent Ring Magnet

Neodymium Permanent Ring Magnet Ø14 x Ø4 x 4 mm N35, Diametral Neodymium Ring Craft Magnet, Powerful Rare Earth Neo Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Neodymium Permanent Ring Magnet Ø14 x Ø4 x 4 mm N35 Feature: Material Neodymium Plating  […]

NdFeB Neo Ring Ø13 x Ø9 x 1 mm N40

NdFeB Neo Ring Ø13 x Ø9 x 1 mm N40

NdFeB Neo Ring Ø13 x Ø9 x 1 mm N40, Sintering Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory NdFeB Neo Ring Ø13 x Ø9 x 1 mm N40 Feature: Material Neodymium Plating  Nickel (Ni-Cu-Ni) […]

Sintered Neodymium Iron Boron Ring

Sintered Neodymium Iron Boron Ring Magnet Ø12 x Ø9 x 1.5mm N45

Sintered Neodymium Iron Boron Ring Magnet Ø12 x Ø9 x 1.5mm N45, Sintering Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Sintered Neodymium Iron Boron Ring Magnet Ø12 x Ø9 x 1.5mm N45 Feature: Material […]

Neodymium NdFeB Ring Magnet

Neodymium NdFeB Ring Magnet Ø12 x Ø7 x 3mm N45

Neodymium NdFeB Ring Magnet Ø12 x Ø7 x 3mm N45, Sintering Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Neodymium NdFeB Ring Magnet Ø12 x Ø7 x 3mm N45 Feature: Material Neodymium Plating  Nickel (Ni-Cu-Ni) […]

Neodymium Diametral Ring Magnet

Neodymium Diametral Ring Magnet Ø12 x Ø4 x 6mm N50

Neodymium Diametral Ring Magnet Ø12 x Ø4 x 6mm N50, Sintering Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Neodymium Diametral Ring Magnet Ø12 x Ø4 x 6mm N50 Feature: Material Neodymium Plating  Nickel (Ni-Cu-Ni) […]

N50 Ring Magnet Neodymium

N50 Ring Magnet Neodymium Ø10 x Ø4 x 6mm

N50 Ring Magnet Neodymium Ø10 x Ø4 x 6mm, Sintering Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory N50 Ring Magnet Neodymium Ø10 x Ø4 x 6mm Feature: Material Neodymium Plating  Nickel (Ni-Cu-Ni) Outer Diameter […]

Ringmagnet Neodym Gold N42

Ringmagnet Neodym Ø10 x Ø4 x 5mm Gold N42

Ringmagnet Neodym Ø10 x Ø4 x 5mm Gold N42, Sintering Neodymium Ring Craft Magnet, Powerful Rare Earth Permanent Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Ringmagnet Neodym Ø10 x Ø4 x 5mm Gold N42 Feature: Material Neodymium Plating  Gold (Ni-Cu-Ni-Au) Outer Diameter […]

Ring Sensor Permanent Magnet

Ring Sensor Permanent Magnet Ø10 x Ø4 x 5mm N42

Ring Sensor Permanent Magnet Ø10 x Ø4 x 5mm N42, Sintering Neodymium Customized Ring Craft Magnet, Powerful Rare Earth Ring Sensor Permanent Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Ring Sensor Permanent Magnet Ø10 x Ø4 x 5mm N42 Feature: Material Neodymium Plating  […]

Neodymium Ring Counterbore Magnet

Neodymium Ring Counterbore Magnet Ø10 x Ø3.4 x 3mm N42

Neodymium Ring Counterbore Magnet Ø10 x Ø3.4 x 3mm N42, Sintering Neodymium Customized Ring Craft Magnet, Powerful Rare Earth Ring Sensor Permanent Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Neodymium Ring Counterbore Magnet Ø10 x Ø3.4 x 3mm N42 Feature: Material Neodymium Plating  […]

Sintered Neodymium Ring Magnet N42SH

Sintered Neodymium Ring Magnet Ø9.5 x Ø6.5 x 2mm N42SH

Sintered Neodymium Ring Magnet Ø9.5 x Ø6.5 x 2mm N42SH, Sintering Neodymium Customized Ring Craft Magnet, Powerful Rare Earth Ring Sensor Permanent Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Sintered Neodymium Ring Magnet Ø9.5 x Ø6.5 x 2mm N42SH Feature: Material Neodymium Plating  […]

NdFeB Ringmagnet N50

NdFeB Ringmagnet Ø8 x Ø2 x 6mm N50

NdFeB Ringmagnet Ø8 x Ø2 x 6mm N50, Sintered Neodymium Customized Ring Craft Magnet, Powerful Rare Earth Permanent Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory NdFeB Ringmagnet Ø8 x Ø2 x 6mm N50 Feature: Material Neodymium Plating Nickel (Ni-Cu-Ni) Outer Diameter D […]

Ring NdFeB Magnet

Ring NdFeB Magnet Ø6 x Ø2 x 2mm N45 Gold

Ring NdFeB Magnet Ø6 x Ø2 x 2mm N45 Gold, Sintered Neodymium Customized Ring Craft Magnet, Powerful Rare Earth Permanent Ring Magnet, Sintered Neodymium Iron Boron (NdFeB) magnet, Buy Super Strong Bulk NdFeB Ring Neo Magnets China Supplier & Factory Ring NdFeB Magnet Ø6 x Ø2 x 2mm N45 Gold Feature: Material Neodymium Plating Gold […]

Super Strong NdFeB Magnet

Super Strong NdFeB Magnet Disc Ø100 x 30mm N45

Super Strong NdFeB Magnet Disc Ø100 x 30mm N45, Sintered Neodymium Customized Disc Craft Magnet, Powerful Rare Earth Permanent Disk Magnet, Buy Super Strong Bulk Huge NdFeB Round Neodymium Disc Magnets China Supplier & Factory Super Strong NdFeB Magnet Disc Ø100 x 30mm N45 Feature: Material Neodymium Plating Nickle (Ni-Cu-Ni) Diameter D 100 mm Volum  […]

Disc NdFeB Permanent Magnets

Disc NdFeB Permanent Magnets Ø90 x 30mm N48

Disc NdFeB Permanent Magnets Ø90 x 30mm N48, Sintered Neodymium Customized Disc Craft Magnet, Powerful Rare Earth Permanent Disk Magnet, Buy Super Strong Bulk Huge NdFeB Round Neodymium Disc Magnets China Supplier & Factory Disc NdFeB Permanent Magnets Ø90 x 30mm N48 Feature: Material Neodymium Plating Nickle (Ni-Cu-Ni) Diameter D 90 mm Volum  190852 mm³ […]

Strong NdFeB Magnet Disc

Strong NdFeB Magnet Disc Cylinder Ø80 x 30mm N50

Strong NdFeB Magnet Disc Cylinder Ø80 x 30mm N50, Sintered Neodymium Customized Disc Craft Magnet, Powerful Rare Earth Permanent Disk Magnet, Buy Super Strong Bulk Medium NdFeB Round Neodymium Disc Magnets China Supplier & Factory Strong NdFeB Magnet Disc Cylinder Ø80 x 30mm N50 Feature: Material Neodymium Plating Nickle (Ni-Cu-Ni) Diameter D 80 mm Volum  […]