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Neodymium Disc Rare Earth Magnets Ø30 x 15mm N42, Powerful Sintered Neodymium Disc Craft Magnet Wholesales, Buy Rare Earth Permanent Disk Magnet, Super Strong Bulk Medium Round NdFeB Neodymium Disc Magnets China Supplier & Factory
Neodymium Disc Rare Earth Magnets Ø30 x 15mm N42 Feature:
Plating Nickel (Ni-Cu-Ni)
Diameter D 30 mm
Volum 10603 mm³
Temperature max. 80 °C
Magnetic Grade N42
Tolerance 0.1 mm
Weight 0,080582 kg
Pull Power Force 27,000 kg
Hight H 15 mm
Collectively known as Rare Earth magnets, Neodymium Iron Boron (NdFeB) and Samarium Cobalt (SmCo) magnets are alloys of the Lanthanide group of elements. Rare Earth magnets are the most advanced commercialized permanent magnet materials today. NdFeB magnets are available in a number of different grades that span a wide range of properties and application requirements.
NdFeB magnets are available in sintered as well as bonded forms. The bonded form of the material can be produced with close tolerances off tool, with little or no finishing required. The energy product of the bonded form is much lower than that of the sintered form – up to 10 MGOe. The sintered form usually requires some finishing operations in order to hold close mechanical tolerances.
NdFeB magnets are brittle (though not as brittle as the SmCo types), and machining operations should be performed prior to magnetization, using diamond tools. We are equipped to fabricate these materials to blueprint specifications.
All NdFeB magnets, except the bonded NdFeB B10N material, are anisotropic, and can only be magnetized in the orientation direction. B10N material is isotropic and can be magnetized in any direction, and with multiple poles, although special magnetizing fixtures are required for this. In general, magnetizing fields of about 30 KOe are required to saturate NdFeB magnets.
NdFeB magnets are manufactured in the 4 following forms:
Sintered – fine NdFeB powder is compacted in a die and then sintered, fusing the powder into a solid material. There are 2 forms of pressing: die pressing (which involves a hard die into which the powder is placed and then pressed), and isostatic pressing (involving a special “rubber” die into which powder is placed and then pressed with equal force in all directions on the powder). Die pressed parts are usually made smaller than isostatically pressed parts. Although the magnetic properties of isostatically pressed parts are higher, the uniformity of magnetic characteristics is usually lower than that of die pressed parts. Sintered parts normally need some finish machining in order to meet final tolerances. rare earth permanent magnet, extremely strong magnet neodymium iron boron disc
|Material||Remanence||Coercivity||Energy product||Maximum temperature|
|N42||12.9-13.2||1.29-1.32||10.8-12.0||860-955||≥ 12||≥ 955||40-42||318-334||≤ 80|