Block 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.

Neodymium block magnets have the highest magnetic properties and are the most powerful commercially available magnets today. Because of their magnetic strength, neodymium block magnets are the preferred choice for many consumer, commercial and technical applications.
Rare Earth Blocks are the number one industrial magnet of choice due to the power of today’s magnetic alloys. Neodymium Block Magnets are offered in several sizes, shapes and Grades. They are the best alternative if you require a multipurpose magnet with maximum magnetic strength.
These block magnets, are made of a special NdFeB alloy, which allows neodymium block magnets to achieve an extreme adhesive force of up to 200 kg. The blocks have a protective nickel coating, some even have gold plating, making them look very appealing.

• Good value for money
• For home & office, work & recreational use
• Protective nickel coating, some with additional gold or copper plating, or epoxy resin coating
• Special types available: countersunk, flat glue-on block magnets

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.

Industrial & Consumer Applications for Neodymium Block Magnets
Neodymium block, bar, and cube magnets are useful for multiple applications that require high magnetic strength. Many industries rely on neodymium magnets' advanced characteristics from design & engineering to creative DIY projects. Specific applications that utilize neodymium block, bar, and cube magnets include:

• Holding Systems Requiring Very High Forces
• Sensors
• Reed switches
• Hard Disc Drives
• Audio Equipment
• Acoustic Pick-Ups
• Headphones & Loudspeakers
• MRI Scanners
• Magnetically Coupled Pumps
• Motors & Generators
• Magnetic Tool Holders
• Magnetic Bearings
• Dental Instruments
• Door Catches
• Medical Devices
• Magnetic Separators
• Lifting Machinery
• Crafts & Model Making
• Hanging Artwork
• Levitation Device
• POP Displays
• Commercial Signage
• Packaging Closures
• Jewelry clasps & more

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.