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.

 

3M Self-Adhesive Block NdFeB Magnets

3M Self-Adhesive Block NdFeB Magnets

3M Self-Adhesive Block NdFeB Magnets, 3M Adhesive Sintered Neodymium-Iron-Boron, Self-Adhesive Rectangular Magnets, Adhesive Rare Earth NdFeB Permanent Block Magnet China Supplier 3M Self-Adhesive Block NdFeB Magnets Description: 1) Material: Sintered Neodymium-Iron-Boron; 2) Temperature: The max Operation temp is up to 80 degree temperature; 3) Grade: N35-N45; 4) Shape: Block, Rectangle, Square, Rectangular ; 5) Size: According to customers’ […]

3M Adhesive Disc Neodymium Magnets

3M Adhesive Disc Neodymium Magnets

3M Adhesive Disc Neodymium Magnets, 3M Self-adhesive Sintered Neodymium Disc Magnet, Adhesive Round Magnets, 3M Adhesive Rare Earth NdFeB Disc Permanent Magnet China Supplier 3M Adhesive Disc Neodymium Magnets Description: 1) Material: Sintered Neodymium-Iron-Boron; 2) Temperature: The max Operation temp is up to 80 degree temperature; 3) Grade: N35-N42; 4) Shape: Disc, Round; 5) Size: According to […]

Sintered Neodymium Block Permanent Magnets

Sintered Neodymium Block Permanent Magnets

Sintered Neodymium Block Permanent Magnets, Rare Earth Neodymium Rectangle Magnets, Customized Rectangular Neodymium Magnets, Super Strong Block Shaped Neodymium Iron Boron Magnets China Factory Product name Customized Sintered Rare Earth Sintered Neodymium Block Permanent Magnets features: 1.Grade: N35, N38, N40, N42, N48, N50, N52 (M, H, SH, EH, UH,AH) 2.Shape: Disc, Ring, Block, Segment, Cylinder, Square, Trapezoid, […]

Rare Earth Neodymium Cylinder Magnets

Rare Earth Neodymium Cylinder Magnets

Rare Earth Neodymium Cylinder Magnets, Sintered Neodymium Rod Permanent Magnets, Customized Rod Neodymium Magnets, Custom Cylindrical Shaped Neodymium Iron Boron Magnets China Factory Product name Customized Sintered Rare Earth Neodymium Cylinder Magnets features: 1.Grade: N35, N38, N40, N42, N48, N50, N52 (M, H, SH, EH, UH,AH) 2.Shape:Disc, Ring, Block, Segment, Cylinder, Trapezoid, Customized Design (Design proper magnets for clients […]

Customized Sintered Neodymium Ring Magnets

Sintered Neodymium Ring Magnets

Sintered Neodymium Ring Magnets, Customized Ring Neodymium Magnets, Custom Ring Shaped Neodymium Iron Boron Magnets, Rare Earth NdFeB PERMANENT Magnets China Factory Product name Customized Sintered Neodymium Ring Magnets features: 1.Grade: N35, N38, N40, N42, N48, N50, N52 (M, H, SH, EH, UH,AH) 2.Shape:Disc, Ring, Block, Segment, Cylinder, Trapezoid, Customized Design (Design proper magnets for clients specific […]

Sintered NdFeB Permanent Magnets

Sintered NdFeB Permanent Magnets

Sintered NdFeB Permanent Magnets, Customized Neodymium Magnets, Custom Shaped Neodymium Iron Boron Magnets, Rare Earth NdFeB PERMANENT Magnets China Supplier Product name Customized Sintered NdFeB Permanent Magnets features: 1.Grade: N35, N38, N40, N42, N48, N50, N52 (M, H, SH, EH, UH,AH) 2.Shape:Disc, Ring, Block, Segment, Cylinder, Trapezoid, Customized Design (Design proper magnets for clients specific requirements) 3.Coating:Ni-Cu-Ni, […]

Customized Neodymium Magnets

Customized Neodymium Magnets

Customized Neodymium Magnets, Custom Shaped Neodymium Iron Boron Magnets, Sintered  NdFeB Permanent Magnet, Rare Earth NdFeB Magnets China Supplier Product name Customized Neodymium Magnets features: 1.Grade: N35, N38, N40, N42, N48, N50, N52 (M, H, SH, EH, UH,AH) 2.Shape:Disc, Ring, Block, Segment, Cylinder, Trapezoid, Customized Design (Design proper magnets for clients specific requirements) 3.Coating:Ni-Cu-Ni, Zn, , Epoxy, […]

Customized Disc NdFeB Magnets

Customized Disc NdFeB Magnets

Customized Disc NdFeB Magnets, Custom Round Shaped Neodymium Iron Boron, Sintered  NdFeB Permanent Magnet, Rare Earth NdFeB Disc Magnets China Manufacturer Product name Customized Disc NdFeB Magnets Permanent magnet Material Neodymium iron boron Grade & working Temperature Grade Max. Operating Temperatures N35-N45 80°C (176°F) N48-N52 60°C (160°F) 35M- 50M 100°C (212°F) 33H-48H 120°C (248°F) 33SH-45SH 150°C […]

NdFeB Countersunk Magnets

NdFeB Countersunk Magnets

NdFeB Countersunk Magnets, Customized Ring Block Disc Shaped Countersunk Neodymium Iron Boron, Sintering Countersunk Permanent Magnet, Rare Earth NdFeB Countersink Magnets China Manufacturer Product name NdFeB Countersunk Magnets Permanent magnet Material Neodymium iron boron Grade & working Temperature Grade Max. Operating Temperatures N35-N45 80°C (176°F) N48-N52 60°C (160°F) 35M- 50M 100°C (212°F) 33H-48H 120°C (248°F) 33SH-45SH 150°C (302°F) […]

Customized Shape Neodymium Magnets

Customized Shape Neodymium Magnets

Customized Shape Neodymium Magnets, Strong Various Shape Neodymium Magnets, Neo Permanent Magnets, Various Shaped Rare Earth NdFeB NIB Magnets China Supplier Customized Shape Neodymium Magnets Features: 1.)Various kinds of Neodymium magnets 2.)High quality and reasonable price 3.)Short lead time Permanent Magnet – Neodymium magnets are actually composed of neodymium, iron and boron (they are also referred to […]

Various Shape Neodymium Magnets

Various Shape Neodymium Magnets

Various Shape Neodymium Magnets, Customized Shape Strong Neodymium Magnets, Various Shaped Rare Earth NdFeB Magnets China Supplier Various Shape Neodymium Magnets Features: 1.)Various kinds of Neodymium magnets 2.)High quality and reasonable price 3.)Short lead time Permanent Magnet – Neodymium magnets are actually composed of neodymium, iron and boron (they are also referred to as NIB or NdFeB magnets). […]

Phosphate Coating Disc Magnets

Phosphate Coating Disc Magnets

Phosphate Coating Disc Magnets, N35SH Phosphate Coated High Temperature Magnets, 15mm x 1mm Small Disc Magnets, Phosphate Plated Round Magnets, Sintered Rare Earth NdFeB Magnet China Manufactory N35SH High Temperature Phosphate Coating Disc Magnets Dia 15mm * 1mm size Feature – Neodymium magnets are also known as Neodymium-Iron-Boron or Nd-Fe-B or NIB super magnets since they are composed […]

N30H Phosphate Coated High Temperature Magnets

N30H Phosphate Coated High Temperature Magnets

N30H Phosphate Coated High Temperature Magnets, 10mm x 34mm Rod Magnets, Phosphate Plated Motor Magnets, Phosphate Coated Sintered Neodymium Cylinder Magnet, Rare Earth Neo Magnet China Manufacturer N30H Phosphate Coated High Temperature Magnets rod 10mm * 34mm size Feature – Neodymium magnets are also known as Neodymium-Iron-Boron or Nd-Fe-B or NIB super magnets since they are composed […]

Phosphate Plated Motor Magnets

Phosphate Plated Motor Magnets

Phosphate Plated Motor Magnets, Phosphate Coated Sintered Neodymium Segment Magnet, Phosphate Coated Rare Earth Neo Block Motor Magnet, Sintered Neodymium Iron Boron China Manufacturer Phosphate Plated Motor Magnets Feature – Neodymium magnets are also known as Neodymium-Iron-Boron or Nd-Fe-B or NIB super magnets since they are composed of these elements. The chemical composition is Nd2Fe14B. […]

Phosphate Coated Magnets

Phosphate Coated Magnets

Phosphate Coated Magnets, Phosphate Plated Sintered Neodymium Block Magnet, Phosphate Coated Rare Earth Neo Block Magnet, Sintered Neodymium Iron Boron Magnets China Manufacturer Phosphate Coated Magnets Block feature: Neodymium magnets are a type of rare earth magnet. They are very strong relative to their size. They are often referred to as rare earth magnets because they […]

Passivation Plated Sintered Neodymium Iron Boron

Passivation Plated Sintered Neodymium Iron Boron

Passivation Plated Sintered Neodymium Iron Boron, Passivation Coated Neodymium Segment Magnets, Phosphate Coated Rare Earth Block Neo Magnet, Sintered Neodymium Iron Boron Plate Magnets China Supplier Passivation Plated Sintered Neodymium Iron Boron feature: Neodymium magnets are a type of rare earth magnet. They are very strong relative to their size. They are often referred to […]

Passivation Coating NdFeB Magnets for Motor

Passivation Coating NdFeB Magnets for Motor

Passivation Coating NdFeB Magnets for Motor, Passivation Plated Neodymium Segment Magnets, Phosphate Coated Rare Earth Neo Arc Magnet, Sintered Neodymium Iron Boron Arc Magnet China Supplier Passivation Coating NdFeB Magnets for Motor feature: Neodymium magnets are a type of rare earth magnet. They are very strong relative to their size. They are often referred to as rare […]

Copper Coating NdFeB Magnets Block

Copper Coating NdFeB Magnets Block

Copper Coating NdFeB Magnets Block, Cu Plated Neodymium Block Magnets, Copper Coated Rare Earth Neo Block Magnet, Sintered NdFeB Magnetic Cube Neodymium Iron Boron China Supplier Copper Coating NdFeB Magnets Block Cubes feature: Neodymium is a rare earth type of permanent magnet made from an alloy of neodymium, iron, and boron. Neo magnets are currently the strongest permanent […]

Cu Plating Neodymium Magnets

Ring Shaped Cu Plating Neodymium Magnets

Ring Shaped Cu Plating Neodymium Magnets, Cu Plated Neodymium Ring Magnets, Copper Coating Rare Earth Neo Ring Magnet, Sintered NdFeB Magnetic Ring China Supplier Ring Shaped Cu Plating Neodymium Magnets feature: Neodymium is a rare earth type of permanent magnet made from an alloy of neodymium, iron, and boron. Neo magnets are currently the strongest permanent magnets […]

Cu Coating Neodymium Magnets Cylinder

Cu Coating Neodymium Magnets Cylinder

Cu Coating Neodymium Magnets Cylinder Shaped, Cu Plating Neodymium Rod Magnets, Copper Coating Rare Earth Neo Cylinder Magnet, Sintered NdFeB Cylindrical Magnets China Supplier Cu Coating Neodymium Magnets Rod Shaped feature: Neodymium is a rare earth type of permanent magnet made from an alloy of neodymium, iron, and boron. Neo magnets are currently the strongest permanent magnets known. […]