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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 its 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.

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
  • Headphones
  • Magnetic bearings
  • Switches

Sizes & Shapes of Neodymium Magnets

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

Magnetic Hold develops custom neodymium magnets in a variety of shapes and sizes:

  • Arc
  • Bar
  • Rod
  • Disc
  • Horseshoe
  • Channel
  • Block
  • Ring
  • Sphere
  • Cylinders
  • Plugs

Custom Neodymium Magnets

Magnetic Hold is a leading manufacturer of custom neodymium magnets. Our team can supply all grades of neodymium magnets, custom shapes, sizes, and coatings. Contact us today for neodymium magnets in any shape or any size!

Neodymium Magnet Plating Options

neodymium sector magnet

Neodymium magnets are prone to corrosion in humid environments. For protective measures 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.

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

Neodymium Magnet Grades & Properties

GradeResidual Induction Br (max)
[KGa]
Max Energy Product BH (max)
MGOe
Coercive Force Hcb
KOe
Curie Temp.
[˚C]
Temp. Coe of Br
[%/˚C)
Max. Practical Operating
Temp. [˚C]
N30 10.8-11.3 28-31 ≥10.0 310 -0.11 80
N35 11.7-12.2 33-36 ≥10.9 310 -0.11 80
N38 12.2-12.5 36-39 ≥11.3 310 -0.11 80
N40 12.5-12.8 38-41 ≥11.4 310 -0.11 80
N42 12.8-13.2 40-43 ≥11.5 310 -0.11 80
N45 13.2-13.8 43-46 ≥11.6 310 -0.11 80
N48 13.8-14.2 46-49 ≥11.6 310 -0.11 80
N50 14.0-14.5 48-51 ≥10.0 310 -0.11 80
N52 14.3-14.8 50-53 ≥10.5 310 -0.11 80
N55 14.5-15.0 51-55 ≥10.5 310 -0.11 80
N30M 10.8-11.3 28-31 ≥10.0 310 -0.11 100
N35M 11.7-12.2 33-36 ≥10.9 310 -0.11 100
N38M 12.2-12.5 36-39 ≥11.3 310 -0.11 100
N40M 12.5-12.8 38-41 ≥11.6 310 -0.11 100
N42M 12.8-13.2 40-43 ≥12.0 310 -0.11 100
N45M 13.2-13.8 43-46 ≥12.5 310 -0.11 100
N48M 13.6-14.3 46-49 ≥12.9 310 -0.11 100
N50M 14.0-14.5 47-51 ≥13.1 310 -0.11 100
N52M 14.2-14.8 49-53 ≥13.1 310 -0.11 100
N30H 10.8-11.3 28-31 ≥10.0 330 -0.11 120
N35H 11.7-12.2 33-36 ≥10.9 330 -0.11 120
N38H 12.2-12.5 36-39 ≥11.3 330 -0.11 120
N40H 12.5-12.8 38-41 ≥11.6 330 -0.11 120
N42H 12.8-13.2 40-43 ≥12.0 330 -0.11 120
N45H 13.2-13.8 43-46 ≥12.1 330 -0.11 120
N48H 13.7-14.3 46-49 ≥12.5 330 -0.11 120
N50H 14.0-14.5 47-51 ≥12.8 330 -0.11 120
N52H 14.2-14.8 50-54 ≥12.8 330 -0.11 120
N30SH 10.8-11,3 28-31 ≥10.1 340 -0.11 150
N35SH 11.7-12.2 33-36 ≥11.0 340 -0.11 150
N38SH 12.2-12.5 36-39 ≥11.4 340 -0.11 150
N40SH 12.5-12.8 38-41 ≥11.8 340 -0.11 150
N42SH 12.8-13.2 40-43 ≥12.4 340 -0.11 150
N45SH 13.2-13.8 43-46 ≥12.6 340 -0.11 150
N48SH 13.6-14.0 43-47 ≥11.5 340 -0.11 150
N50SH 13.9-14.2 48-51 ≥13.1 340 -0.11 150
N30UH 10.8-11.3 28-31 ≥10.2 350 -0.11 180
N35UH 11.8-12.2 33-36 ≥10.8 350 -0.11 180
N38UH 12.2-12.5 36-39 ≥11.0 350 -0.11 180
N40UH 12.5-12.8 38-41 ≥11.3 350 -0.11 180
N42UH 12.8-13.5 40-43 ≥11.0 350 -0.11 180
N45UH 13.2-13.8 42-46 ≥11.0 350 -0.11 180
N48UH 13.6-14.0 46-49 ≥12.9 350 -0.11 180
N30EH 10.8-11.3 28-31 ≥10.2 360 -0.11 200
N35EH 11.7-12.2 33-36 ≥11.0 360 -0.11 200
N38EH 12.2-12.5 36-39 ≥11.3 360 -0.11 200
N40EH 12.8-12.8 38-41 ≥11.8 360 -0.11 200
N42EH 12.8-13.2 40-44 ≥12.5 360 -0.11 200
N45EH 13.2-13.6 43-46 ≥12.5 360 -0.11 200
N30AH 10.8-11.3 28-31 ≥10.2 360 -0.11 220
N35AH 11.7-12.1 33-37 ≥11.0 360 -0.11 220

Gs: Gauss
Oe: Oersted
˚C: Degree Celcius

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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