NdFeB Rare Earth Magnets

NdFeB Rare Earth Magnets

Neodymium Magnets (Nd-Fe-B) Overview

Neodymium Magnets (Neodymium Iron Boron Magnets), also known as NdFeB, NIB, or Neo magnets, are the most widely-used type of rare-earth magnet. It is the strongest type of permanent magnet made from an alloy of Neodymium, Iron, and Boron with the Nd2Fe14B tetragonal crystalline structure. It has replaced other types of magnets in many applications in modern products that require strong permanent magnets, such as motors in cordless tools, hard disk drives, and magnetic fasteners.

Use of sintered Neodymium magnets, either as an individual magnet or in an assembly, without license is prohibited by the Patent Law of the United States of America. All sintered Neodymium Iron Boron magnets supplied by Stanford Magnets Company are licensed.

Contact US

 

 

We can provide magnets of any size and almost any grade according to the specifications you provide. If you are in need of customized magnets, please mail to sales@stanfordmagnets.com or fax your drawing to (949) 812-6690 for more information. We'll get back to you within 2 to 3 businss days.

 

Neodymium Magnets Properties

Grade Residual Induction
(Br)
Coercive Force
(Hc)
Intrinsic Coercive Force
(Hci)
Maximum Energy Product
(Bhmax)
Maximum Operating
Temperature
Inquiry
(G) (mT) (Oe) (kA/m) (kOe) min (kA/m) min (MGOe) (KJ/m3) (7C) (F)
N35 11700 1170 10900 868 12 955 35 279 80 176 Inquiry
N38 12200 1220 11300 899 12 955 38 303 80 176 Inquiry
N40 12500 1250 11400 907 12 955 40 319 80 176 Inquiry
N42 12800 1280 11500 915 12 955 42 335 80 176 Inquiry
N45 13200 1320 11600 923 12 955 45 359 80 176 Inquiry
N48 13800 1380 11600 923 12 955 48 382 80 176 Inquiry
N50 14000 1400 10000 796 11 876 50 398 60 140 Inquiry
N52 14300 1430 10000 796 11 876 52 414 60 140 Inquiry
33M 11300 1130 10500 836 14 1114 33 263 100 212 Inquiry
35M 11700 1170 10900 868 14 1114 35 279 100 212 Inquiry
38M 12200 1220 11300 899 14 1114 38 303 100 212 Inquiry
40M 12500 1250 11600 923 14 1114 40 319 100 212 Inquiry
42M 12800 1280 12000 955 14 1114 42 335 100 212 Inquiry
45M 13200 1320 12500 995 14 1114 45 359 100 212 Inquiry
48M 13600 1360 12900 1027 14 1114 48 382 100 212 Inquiry
50M 14000 1400 13000 1033 14 1114 50 398 100 212 Inquiry
35H 11700 1170 10900 868 17 1353 35 279 120 248 Inquiry
38H 12200 1220 11300 899 17 1353 38 303 120 248 Inquiry
40H 12500 1250 11600 923 17 1353 40 319 120 248 Inquiry
42H 12800 1280 12000 955 17 1353 42 335 120 248 Inquiry
45H 13200 1320 12100 963 17 1353 45 359 120 248 Inquiry
48H 13700 1370 12500 995 17 1353 48 382 120 248 Inquiry
35SH 11700 1170 11000 876 20 1592 35 279 150 302 Inquiry
38SH 12200 1220 11400 907 20 1592 38 303 150 302 Inquiry
40SH 12500 1250 11800 939 20 1592 40 319 150 302 Inquiry
42SH 12800 1280 12400 987 20 1592 42 335 150 302 Inquiry
45SH 13200 1320 12600 1003 20 1592 45 359 150 302 Inquiry
28UH 10200 1020 9600 764 25 1990 28 223 180 356 Inquiry
30UH 10800 1080 10200 812 25 1990 30 239 180 356 Inquiry
33UH 11300 1130 10700 852 25 1990 33 263 180 356 Inquiry
35UH 11800 1180 10800 860 25 1990 35 279 180 356 Inquiry
38UH 12200 1220 11000 876 25 1990 38 303 180 356 Inquiry
40UH 12500 1250 11300 899 25 1990 40 319 180 356 Inquiry
42UH 12800 1280 11300 899 25 1990 42 335 180 356 Inquiry
28EH 10400 1040 9800 780 30 2388 28 223 200 392 Inquiry
30EH 10800 1080 10200 812 30 2388 30 239 200 392 Inquiry
33EH 11300 1130 10500 876 30 2388 33 263 200 392 Inquiry
35EH 11700 1170 11000 876 30 2388 35 279 200 392 Inquiry
38EH 12200 1220 11300 899 30 2388 38 303 200 392 Inquiry
40EH 12500 1250 11300 899 30 2388 40 319 200 392 Inquiry
28AH 10400 1040 9900 787 33 2624 28 223 230 446 Inquiry
30AH 10800 1080 10300 819 33 2624 30 239 230 446 Inquiry
33AH 11300 1130 10600 843 33 2624 33 263 230 446 Inquiry
35AH 11700 1170 11000 876 33 2624 35 279 230 446 Inquiry
38AH 12200 1220 11300 899 33 2624 38 303 230 446 Inquiry

 

Key Advantages

  • Neodymium magnets are the most powerful commercially produced magnets.
  • Higher Maximum Energy Product ranging from 30 MGOe to 52 MGOe.
  • Neodymium magnets can replace Samarium Cobalt magnets, especially where operating temperature is lower than 176F/80C.
  • Very high strength and relatively low cost.
  • Compared to Alnico and Sm-Co magnets, relatively easier to machine.

Quick Leads

  • Manufacturing process - sintering (most common), injection molding, and compression bonding.
  • Shapes available - blocks, bars, discs, rings, cylinders, arc segments, or irregular shapes, etc.
  • Wide range of Grades available - from 3512 to 3833 or N35 to 38AH (First 2 digits represent Bhmax, and second two digits represent Intrinsic Coercivity, Hci.)
  • Density: 7.4 -7.6 g/ cm3; Hardness: 600 {Hv}
  • Prone to oxidation, plating (Ni-Cu-Ni) is recommended
  • Some particular grades of Stanford Magnets can achieve 446F/230C, the Max working temperature.
  • Saturation magnetizing field required - about 35kOe
  • Machining - Neodymium magnets should be machined by grinding using diamond wheels, however, of hard magnet materials, Neo magnets are the easiest ones. We can successfully machine very small magnets with tolerances up to .001".

Common Applications

Sensors   Linear actuators   Microphone assemblies    Magnetic separators   DC and servo motors   Speakers   Printers   Magnetic hooks Computer rigid disc drives   Beam controls   Intelligent toys   MRI/NMR