Sintered Neodymium Iron Boron(NdFeB) magnets are made from different kinds of rare earth materials, such as Nd, Dy, Fe, Al, Nb, Ga, Mo, Co and few other metals and they are the third generation rare earth permanent magnets that is the strongest magnets in the world and they feature high remanence, high corrective force and high energy products and they are more than 10 times stronger than ferrite(ceramic) magnets. The ordinary coatings include Nickel(Ni-Cu-Ni), Black nickel, Zinc(Trivalent), Epoxy, Tin, Gold, Silver & Parylene etc. The ordinary grades of NdFeB magnets have N35, N38 to N52, N35M, N28M to N48M, N33H to N46H, N33SH to N44SH, N30UH to N35UH and N30EH to N35EH and their BHmax is 52MGOe that is the highest grade We can make now. Their highest working temperature is 200 °C. They almost can be any size and shape, such as block, disc, ring, segment, cylinder and any special shapes. They have wide applications such as wind generators,DC motors, air conditioners, servo motors, PM motors, linear motors, VCM, medical apparatus, electronic components, toys, hand crafts and other magnetic holding and seperating products.

Neodymium Segment magnets are also called Arc magnets that are made by wire cutting from block magnets. This kind of segment magnets are usually used in DC motors and other electric motors. They are usually shipped to customer by magnetizing 50% N poles outside and 50% S poles outside so they can be assemblied to a radial ring magnet with N-S-N-S---poles lined and this method can make sure the biggest work effiencu of NdFeB Segment magnets in motors. The ordinary grade in motors is N35SH or N38SH with maximum working temperature 150°C. These NdFeB Arc /Tile shaped magnets can be coated Nickel(Ni-Cu=Ni), Black Nickel, Zinc(Trivalent), Epoxy, Stannum, Gold, Silver or Parylene etc in order to keep from rusting. The highest grades for these products are N52, N48M, N44H, N42SH, N38UH and N35EH etc.