Segment Magnets  Manufacturers, Traders, Suppliers

Different type of PERMANENT MAGNET: NdFeB magnets, Ferrite magnets, Alnico magnets，SMCO magnets，etc.,
Sintered NdFeB Magnets (also known as Neodymium magnets ,Neo magnets,or NIB) is the most powerful and advanced permanent magnet today .Sintered NdFeB magnets has the high remanence, high coercive force and high energy. It has very high performance and high cost ration. It can be easily formed into various sizes and different shapes, which are disc, ring, block, segment, special and so on.
Due to their outstanding magnetic properties (high remanence Br 1.1-1.5 T, middle high coercivity Hcj 800-3000 kA/m^3 and high maximum energy product (BH)max 220-430 kJ/m^3) together with competitive cost, sintered NdFeB magnets are widely applied in DC motors, servo motors, stepper/stepping motors, synchronous motors, linear motors, voice coil motors (VCMs), wind turbines and generators, magnetic resonance imaging (MRI), electric power steering (EPS), magnetic separation, etc.

CJ Magnet can provide you with Neodymium, Ferrite, Samarium Cobalt, Alnico rare earth permanent magnets and magnet assemblies.We can also provide you with customized services.

• remarkable range of magnet shapes and sizes in stock,
• unique cofiguration online tools available,
• and excellent support.

Neodymium Arc Motor Segment Magnets for Motor and Generator is a common type of neodymium magnet. These neodymium rare earth arc magnets, curved magnets, segment magnets, motor magnets can be assembled together in a iron housing and will provide magnetic field for electromagnetic motors. Neodymium arc magnets are widely used in high performance motors and various other electronics.

The arc magnet segments enable rotational movement by arranging the magnets with alternating negative and positive poles on the inside and outside diameters. This creates the attractive and repelling magnetic force inside the cylindrical motor body that is required to generate rotational movement at the driveshaft. The magnetic force and rotational speed is controlled by increasing or decreasing the electromagnetic field strength inside the windings. Magnetic fields that are generated by Permanent magnets to drive DC electric motors help conserve battery life. This makes cordless power tools convenient and provides a viable option to mains powered electric tools and appliances.

Neodymium Magnets Features & Characteristics
Grades & Materials - Neodymium magnet materials in both standard and premium grades for reduced production and lead times. We offer sintered neodymium magnets in grades ranging from N30 to N55.
Sizes & Shapes - Sizes for standard Neodymium Iron Boron rare-earth magnets range from a few millimeters to approximately 150 mm, while assemblies can weigh up to several tons. Standard shapes include discs, blocks, rings, and arc segments in various sizes and grades. Non-standard shapes and sizes can be custom fabricated exact specifications from raw stock.
Temperature Considerations - Neodymium magnets are temperature sensitive. For applications in which the magnet may be exposed to temperatures in excess of about 250°F (120°C), careful consideration must be given to the choice of magnet grade and the magnetic circuit.
Manufacturing Methods - Due to the relatively brittle nature and high-magnetic strength of NdFeB magnets, cutting and grinding should be done prior to magnetization. We are fully equipped to machine these materials to virtually any shape and size for your project’s specialty requirements using our in-house grinding and EDM facilities. Finishing to tolerances of +/-0.05mm can be achieved, as required.
Surface Treatments - Neo magnets are susceptible to oxidation, so painting, epoxy coating, or plating is highly recommended to prevent corrosion. The common surface treatments include nickel plating, zinc, or epoxy coatings.
Handling & Storage - Neodymium materials are relatively brittle, but are magnetically very strong. They must therefore be handled carefully to avoid injury to personnel and damage to the magnets.

Neodymium magnets have replaced alnico and ferrite magnets in many of the myriad applications in modern technology where strong permanent magnets are required, because their greater strength allows the use of smaller, lighter magnets for a given application. Some examples are:

• Head actuators for computer hard disks
• Mechanical e-cigarette firing switches
• Locks for doors
• Loudspeakers and headphones
• Mobile phone speakers, taptic feedback and auto focus actuators
• Magnetic bearings and couplings
• Benchtop NMR spectrometers
• Electric motors
• Electric generators for wind turbines (only those with permanent magnet excitation)
• Voice coil
• Retail media case decouplers
• In process industries, powerful neodymium magnets are used to catch foreign bodies and protect product and processes
• Identifying precious metals in various objects (cutlery, coins, jewelry etc.)

Samarium Cobalt magnets is widely used in electron beam devices, high-end motors, sensors and magnetic assemblies. Due to its high magnetic properties (higher Br, higher Hcj and (BH)max), extremely low temperature coefficient, high working temperature (up to 350 ° C) and strong corrosion resistance. It can not be replaced by other permanent magnets.
Sintered NdFeB magnet is the most magnetic permanent magnet materials in the world today. With their excellent permanent magnet properties that surpass traditional materials, it is widely used in VCM, mobile phones, MRI, audio equipment, automotive motors and other fields, is an indispensable functional material for modern industry.

Please see File as attached below.