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custom neodymium magnets

Neodymium Iron Boron (NdFeB) magnets, of the Rare Earth class, are made from the alloys neodymium, iron and boron and are the most commonly used rare-earth magnets. They have been commercially available since the mid -1980's. Neodymium magnets’ popularity has grown rapidly due to their high Maximum Energy Product and their wide range of available shapes, sizes, and grades.

Neodymium magnets can be manufactured by sintering, compression bonding, injection molding, and extrusion. The sintered form holds the highest energy product of up to 52 MGOe, while the bonded form holds a lower energy product of up to 10 MGOe. The majority of the neodymium magnets are anisotropic and can only be magnetized in the orientation direction.

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View Grades & Properties Table

Applications of Neodymium Magnets

  • Magnetic Separators
  • Wind Turbines
  • Linear actuators
  • Microphone assemblies
  • Servo motors
  • Tape recorders
  • Alternators
  • Pacemakers
  • DC motors (automotive starters)
  • Flow meters

Sizes & Shapes of Neodymium Magnets

neodymium block magnets
Block
neodymium ring magnets
Ring
neodymium rod disc
Rod / Disc / Plug

Neodymium Magnet Plating Options

neodymium sector magnet

Neodymium magnets are prone to corrosion in humid environments. For protective measure for corrosion resistance, Magnetic Hold offers nickel, zinc, tin, silver, gold plating and spray coating epoxy resin.

To find out more information, request a quote through our online form. For custom shapes and sizes, please send a drawing or sketch. If one is not available, we can work with you to create your custom magnets.

Build Your Custom Magnet

The table below offers some guidelines for selecting a grade that will best suit your application.

Neodymium Magnet Grades & Properties

GradeBr
Residual Induction
kGs
Hcb
Coercive Force
kOe
Hcj
Intrinsic Coercive Force
kOe
(BH)max
Max Energy Product
MGOe
Max. Practical Operating Temp.
˚F
N35 11.7-12.2 10.9 12 33-36 176
N38 12.2-12.5 11.3 12 36-39 176
N40 12.5-12.8 11.4 12 38-41 176
N42 12.8-13.2 11.5 12 40-43 176
N45 13.2-13.8 11.6 12 43-46 176
N48 13.8-14.2 11.6 12 46-49 176
N50 14.0-14.5 11.0 12 48-51 176
N52 14.3-14.8 10.5 11 50-53 140
N38M 12.2-12.5 11.3 14 36-39 212
N40M 12.5-12.8 11.6 14 38-41 212
N42M 12.8-13.2 12.0 14 40-43 212
N45M 13.2-13.8 12.5 14 43-46 212
N48M 13.6-14.3 12.9 14 46-49 212
N50M 14.0-14.5 13.0 14 48-51 212
N52M 14.2-14.8 13.3 14 49-53 212
N38H 12.2-12.5 11.3 17 36-39 248
N40H 12.5-12.8 11.6 17 38-41 248
N42H 12.8-13.2 12.0 17 40-43 248
N45H 13.2-13.8 12.3 17 43-46 248
N48H 13.7-14.3 12.5 16 46-49 248
N50H 14.0-14.5 12.9 16 47-51 248
N33SH 11.3-11.7 10.6 20 31-34 302
N35SH 11.7-12.2 11.0 20 33-36 302
N38SH 12.2-12.5 11.4 20 36-39 302
N40SH 12.5-12.8 11.8 20 38-41 302
N42SH 12.8-13.2 12.1 20 40-43 302
N45SH 13.2-13.8 12.3 20 43-46 302
N46SH 13.4-14.0 12.5 20 43-47 302
N33UH 11.3-11.7 10.7 25 31-34 356
N35UH 11.8-12.2 10.8 25 33-36 356
N38UH 12.2-12.5 11.3 25 36-39 356
N40UH 12.5-12.8 11.8 25 38-41 356
N42UH 12.8-13.5 12.1 25 40-43 356
N30EH 10.8-11.3 10.2 30 28-31 392
N33EH 11.3-11.7 10.5 30 31-34 392
N35EH 11.7-12.2 11.0 30 33-36 392
N38EH 12.2-12.5 11.3 30 36-39 392
N28AH 10.4-10.9 9.7 35 26-29 446
N30AH 10.8-11.3 10.2 35 28-31 446
N33AH 11.3-11.7 10.5 35 31-34 446
N35SHT 11.7-12.1 10.8 22.5 33-36 320
N38SHT 12.2-12.5 11.3 22.5 36-39 320
N40SHT 12.2-12.5 11.4 22.5 38-41 320
N42SHT 12.5-12.8 11.8 22.5 40-43 320
N45SHT 12.8-13.2 12.4 22.5 43-46 320
N35UHT 11.8-12.2 10.8 27 33-36 374
N38UHT 12.2-12.5 11.3 27 36-39 374
N40UHT 12.5-12.8 11.8 27 38-41 374
N42UHT 12.8-13.5 12.1 26 40-43 374
N30EHT 10.8-11.3 10.2 33 28-31 410
N33EHT 11.3-11.7 10.5 33 31-34 410
N35EHT 11.7-12.2 11.0 33 33-36 410
N38EHT 12.2-12.5 11.3 31 36-39 410

Br: Residual Induction
Gs: Gauss
Hc: Coercive Force
Oe: Oersted
Bd Hd: Maximum Energy Product
˚F: Degree Fahrenheit

Standard Tolerances (inches);
All shapes and sizes (±0.005)

Magnetism Direction Options

  • Square and rectangular Sintered Neodymium magnets can be magnetized with two poles ("N" & "S") thru the length, width, thickness and with multiple poles.
  • Round Sintered Neodymium magnet can be magnetized with two poles ("N" & "S") the thickness, diametrically and with multiple poles.
  • Ring Sintered Neodymium magnet can be magnetized with two poles ("N" & "S") thru the thickness, diametrically and with multi poles. Contact us for magnetism direction of irregular shapes.

Caution!

Extreme caution must be taken when working with rare earth magnets. Magnets larger than a few centimeters are strong enough to cause injuries to body parts pinched between two magnets, or a magnet and a metal surface, even causing broken bones. Magnets allowed to get too close to each other can strike one another with force to chip and shatter the brittle material, and the flying chips can cause injuries.

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