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The spherical shaped strong NdFeB magnets are give the name of rare earth neodymium(NdFeB) sphere magnets,and also known as neodymium ball magnets and magnetic sphere&balls. we just use the diameter size to express a neodymium sphere magnets.
Rare earth neodymium(NdFeB) spherical magnets are easy to corrode, and its surface need to be coated, generally including zinc plating, nickel, environmental protection zinc, environmental protection nickel, nickel copper nickel, environmental protection nickel copper nickel,epoxy coating etc.
Surface | Coating | Thickness (Microns) | Color | Resistance |
Passivation | 1 | Silver Grey | Temporary Protection | |
Nickel | Ni+Ni | 10-20 | Bright Silver | Excellent Against Humidity |
Ni+Cu+Ni | Good Against Salt Spray | |||
Zinc | Zn | 8-20 | Bright Blue | Excellent Against Salt Spray |
C-Zn | Shinny Color | Superior Against Humidity | ||
Tin | Ni+Cu+Sn | 15-20 | Silver | Superior Against Humidity |
Silver | Ni+Cu+Ag | 10-20 | Silver | Superior Against Humidity |
Gold | Ni+Cu+Au | 10-20 | Gold | Temporary Protection |
Copper | Ni+Cu | 10-20 | Gold | Excellent Against Humidity&Salt Spray |
Epoxy | Epoxy | 15-25 | Black,Red,Grey | Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases, Fungi and Bacteria,FDA Approved |
Ni+Cu+Epoxy | Excellent Against Humidity | |||
Zn+Epoxy | ||||
Parylene | Parylene | 5-20 | Grey | Excellent Against Humidity |
Chemical | Ni | 10-20 | Silver Grey | Excellent Against Humidity |
Neodymium(NdFeB) sphere magnets are non-standard magnetic balls,sintered Nd-Fe-B material has good machinability and can be customized into different sizes of neodymium magnet balls,mould is not needed for customizing strong neodymium sphere magnets.We can make any size of tiny and large neodymium sphere magnets for any quantity.
The small spherical rare earth neodymium(NdFeB) magnetic are used to make magnetic puzzle toys.
The strong neodymium(NdFeB) spherical magnets are used on magnetic jewelry.
Neodymium Material Grade | Maximum Working Temp. | Curie Temp. |
N（N35,N38,N40,N42,N45,N48,N50,N52） | 176°F (80°C) | 590°F (310°C) |
N-M（N35M,N38M,N40M,N42M,N45M,N48M,N50M,N52M） | 212°F (100°C) | 644°F (340°C) |
N-H（N35H,N38H,N40H,N42H,N45H,N48H,N50H） | 248°F (120°C) | 644°F (340°C) |
N-SH（N35SH,N38SH,N40H,N42SH,N45SH,N48SH） | 302°F (150°C) | 644°F (340°C) |
N-UH（N28UH,N30UH,N33UH,N35UH,N38UH,N40UH,N42UH） | 356°F (180°C) | 662°F (350°C) |
N-EH（N28EH,N30EH,N33EH,N35EH,N38EH,N40EH） | 392°F (200°C) | 662°F (350°C) |
N-AH（N28AH,N33AH,N35AH,N38AH） | 428°F (230°C) | 662°F (350°C) |
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