Rotor 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.

A permanent magnet rotor assembly is a crucial component in various applications, including BLDC motors, generators, and magnetic couplings. It consists of a rotor with permanent magnets, such as neodymium magnets, mounted on it to ensure an efficient and reliable magnetic field generation. The interaction between the magnetic field produced by the rotor and the stator (the stationary part of the motor or generator) enables the conversion of electrical energy into mechanical energy or vice versa.

The rotor assembly portfolio includes rare-earth magnets such as neodymium magnets and Samarium-Cobalt to ensure maximum magnetic field strength and excellent performance. And the multipole ring magnets provide a uniform magnetic field and contribute to enhanced motor efficiency.

The permanent magnet rotor assembly, featuring neodymium magnets and multipole ring magnets, is the ideal choice for those seeking high-quality, reliable, and efficient magnetic solutions for their BLDC motors and other applications.

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.

Cylindrical housing made of metal with magnet or magnet system for various magnetic applications;

The areas of application are very versatile;