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custom neodymium magnets

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 custom-engineered neodymium magnets in any shape and size!

Some of the most common Neodymium magnets we have provided are N35, N42, N45, N48, N52, and N55. Click below to see our wide selection of grades available for your specific needs.

View Available Neodymium Magnet Grades

View Grades & Properties Table

Neodymium Iron Boron (NdFeB) magnets are the most commonly used rare-earth magnets and are made from 3 alloys:

  • Neodymium
  • Iron
  • Boron
Neodymium magnets have been commercially available since the mid-1980's. Their high Maximum Energy Product and their wide range of available shapes, sizes, and grades are what make these magnets widely popular. 

Manufacturing of Neodymium Magnets

Neodymium magnets can be manufactured by:

  • Sintering
  • Compression bonding
  • Injection molding
  • Extrusion

Magnetizing

  • The sintered form holds the highest energy product of up to 55 MGOe
  • The bonded form holds a lower energy product of up to 10 MGOe
  • The majority of neodymium magnets are anisotropic and can only be magnetized in the direction of orientation
View Magnetism Directions Available

View Magnetism Directions Available

Sizes & Shapes of Neodymium Magnets

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

Magnetic Hold engineers and manufactures custom neodymium magnets in a variety of shapes and sizes, including:

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

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

Neodymium Magnet Plating & Coating Options

Neodymium Magnets Coating Options

Neodymium magnets are prone to corrosion in humid environments.

For protective measures for corrosion resistance, Magnetic Hold offers plating and coating options.

Plating:

  • Nickel
  • Black Nickel
  • Chemical Nickel
  • Nickel + Epoxy
  • Zinc
  • Silver
  • Gold

Coating: 

  • Epoxy
  • Phosphate
  • Phosphate + Parylene
  • Phosphate + Teflon
  • Plastic
  • Nano 

Nano Coating: As a water-based coating, it is best suited for magnets that are exposed to salt water.

Magnets with Nano coating showed no signs of corrosion in up to 500 hours of continuous salt spray (5% NaCl, Sodium Chloride) in a controlled environment. Operating temperature of this coating ranges from -40°C to 200°C.

To find out more information, request a quote here 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.

Magnetism Direction Options

We can offer several different magnetization directions, see below schematics. Their availability is limited to size. Magnetization fixture cost may apply for large and custom magnets with magnetization other than what is shown below

 

Cylinder Ring, Axial
Cylinder Ring, Axial
Cylinder Ring, Diametrical
Cylinder Ring, Diametrical
Cylinder, Axial
Cylinder, Axial
Cylinder, Diametrical
Cylinder, Diametrical
Disc Ring, Axial
Disc Ring, Axial
Disc Ring, Diametrical
Disc Ring, Diametrical
Disc, Axial
Disc, Axial
/Disc, Diametrical
Disc, Diametrical
Rectangle, Axial
Rectangle, Axial
Rectangle, Length
Rectangle, Length
Rectangle, Width
Rectangle, Width
Segment Thru Circumference
Segment Thru Circumference
Segment Thru Diameters
Segment Thru Diameters
Segment Thru Thickness
Segment Thru Thickness

 

 

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

Br: Residual Induction
Gs: Gauss
Hc: Coercive Force
Oe: Oersted
˚C: Degree Celcius
MGOe: Mega Gauss Oersted

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

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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