N50 Gray Epoxy Plated Ring-Shaped Magnet Neo, NdFeB Ring Annular Magnet, Sintered Neodymium-Iron-Boron Permanent Ring Rare Earth Magnets, circinate ringed Epoxy Coated Super Strong Superior Armillary Magnets China Supplier N50 Gray Epoxy Plated Ring-Shaped Magnet Neo Specifications Dimension: Custom size Magnetised: radial direction Grade: N50 Coating: Epoxy (Gray Epoxy) Maximum Temp: 80°C WARNINGS: All neodymium […]
Segmention Neodymium Motor Permanent Magnet N35UH, Strong Neodymium Arc Magnet, Sintered Neodymium Motor Magnets, Segment Arc shaped NdFeB Magnets for electric motors, Sector magnets, Motor Magnets / Rare earth magnets
Segmention Neodymium Motor Permanent Magnet N35UH Feature:
Part No.: NSGN35UH-37
Dimensions: CUSTOMER DRAWING NDA
Material: Neodymium, Grade N35UH
Magnetization Direction: North on outside face
Max. Operating Temperature: 120°C
Applications of Neodymium Magnets
DC motors (automotive starters)
Computer rigid disc drives, printers and speakers
For as-pressed material, tolerance on the thickness (direction of magnetization) is +/– .005”. Other dimensions are +/– 2.5% or +/– .005”, whichever is greater.
According to International Magnetics Association/Magnet Materials Producers Association (IMA/MMPA) standards, visual imperfections such as hairline cracks, porosity and minor chips are commonly found in sintered magnets. A chipped edge is considered acceptable if no more than 10% of the surface is missing. Cracks are acceptable as long as they do not extend across more than 50% of the pole’s surface.
Attributes of Neodymium Material
Very high resistance to demagnetization
High energy for size
Good in ambient temperature
Material is corrosive and should be coated for long term maximum energy output
Low working temperature for heat applications, but higher levels of heat resistance materials are being introduced periodically
Since neodymium magnet material is prone to chipping and cracking, it does not lend itself to conventional machining methods. However, neodymium can be abrasively ground, but only with the use of liberal amounts of coolant. The coolant minimizes heat fracturing and the risk of fires caused by oxidized grinding dust.
Magnetizing and Handling
Neodymium magnets are very brittle and very strong magnetically. Therefore, it is crucial to handle these magnets with extreme care to avoid personal injury and damage to the magnets. Fingers can be severely pinched between attracting magnets. Magnets can chip if allowed to “jump at” an attracting object. It is highly recommended that when constructing rare earth magnetic assemblies, they be magnetized after assembly.
Motor Magnets / Rare earth magnets are mostly used in motor, such as permanent magnet D.C. motors, wound field D.C. motors, gear motors, custom D.C. motors. generator or electric motor; electrical machinery. Zinc Plated NdFeB Permanent Type Motor Magnets N42H
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