What are Neodymium Magnets
A neodymium magnet are made from an alloy of iron, boron and neodymium. Neodymium magnets are the strongest type of permanent magnet commercially available.
What are Magnet Grades?
A magnet grade is a measure of the strength of a magnet and in most cases a higher number indicates a stronger magnet.
The grade number starts with the letter N for neodymium magnets. The number that follows is the maximum energy product of the magnet in Mega-Gauss Oersteds. This is the primary indicator of a magnets strength. The greater the number, the greater the magnetic field the magnet will generate in an application and represents the strongest point on the BH Curve (Magnet’s Demagnetization Curve).
What are Neodymium Magnets
What are the grades of neodymium magnets?
| Material | Br | Hcb (Hc) | Hcj (Hci) | (BH)max | ||||
| mT | G | kA/m | Oe | kA/m | mT | G | kA/m | |
| N27 | 1,030 | 10,300 | 796 | 10,000 | 955 | 12,000 | 119 | 25 |
| N30 | 1,080 | 10,800 | 796 | 10,000 | 955 | 12,000 | 223 | 28 |
| N33 | 1,130 | 11,300 | 836 | 10,500 | 955 | 12,000 | 247 | 31 |
| N35 | 1,170 | 11,700 | 868 | 10,900 | 955 | 12,000 | 263 | 33 |
| N38 | 1,220 | 12,200 | 899 | 11,300 | 955 | 12,000 | 287 | 36 |
| N40 | 1,250 | 12,500 | 907 | 11,400 | 955 | 12,000 | 302 | 38 |
| N42 | 1,280 | 12,800 | 915 | 11,500 | 955 | 12,000 | 318 | 40 |
| N45 | 1,320 | 13,200 | 923 | 11,600 | 955 | 12,000 | 342 | 43 |
| N48 | 1,380 | 13,800 | 923 | 11,600 | 955 | 12,000 | 366 | 46 |
| N50 | 1,400 | 14,000 | 796 | 10,000 | 876 | 11,000 | 382 | 48 |
| N52 | 1,430 | 14,300 | 796 | 10,000 | 876 | 11,000 | 398 | 50 |
What are neodymium magnets used for?
Neodymium magnets are used for a wide variety of industrial applications including: locks, bearings and couplings, motors, generators and much more.
Why are neodymium magnets coated?
Neodymium reacts to oxygen and oxidizes if untreated. That’s why a protective coating is needed. The coating is so thin that it doesn’t significantly impact the force of the magnet.
What are common coatings?
Nickel (Ni-Cu-Ni) – Most common and is a shiny metallic color. It has a great price/performance coating.
Gold-coating (Ni-Cu-Ni-Au) – Thin coating and is a shiny metallic color. It rubs off so good for decorative purposes only.
Chrome (Ni-Cu-Ni-Cr) – Good resistance to rubbing and is a dull gray color. Great for round or spherical magnets.
Copper (Ni-Cu) – A dull brown-red-metallic color and frequently used for decorative purposes.
Epoxy resin (Ni-Cu-Ni-Epoxy) – Black color and is non-corrosive. Coating is brittle.
What info do we need to know to help you with your application?
Any specific size the magnet need to be? Wedge Shaped NdFeB Magnets with Counter Sunk Hole
What is the maximum operating temperature that the magnet will be exposed to? Ferrite Power Core RM4 RM5 RM6 RM7 RM8 RM10 RM12 RM14 RM14R
What other materials will the magnet be exposed to? Rare Earth Wedge Magnet For Wind Generator
Are there specific coating requirements? MAGNET IN ALL CATEGORIES
