Sintered Neodymium Magnets, Sintered neodymium-iron-boron (Nd-Fe-B) magnets, Rare Earth NdFeB Magnets, Neodymium Permanent Magnets
HangSeng Magnetech uses only licensed neodymium and licensed magnet materials for all applications.
Sintered neodymium-iron-boron (Nd-Fe-B) magnets are licensed rare earth magnets which are the most powerful commercialized permanent magnets available today, with maximum energy product ranging from 26 MGOe to 52 MGOe. Neodymium Iron Boron is the third generation of permanent magnet developed in the 1980s. It has a combination of very high remanence and coercivity and comes with a wide range of grades, sizes and shapes. With its excellent magnetic characteristics Nd-Fe-B offers flexibility for new designs or as a replacement for traditional magnet materials such as ceramic, Alnico and Sm-Co for achieving higher efficiency and more compact devices.
A powder metallurgy process is used in producing sintered Neodymium magnets. Although sintered Neodymium is mechanically stronger than Samarium Cobalt magnets and less brittle than other magnets, it should not be used as a structural component. Selection of Nd-Fe-B is limited by temperature due to its irreversible loss and moderately high reversible temperature coefficient of Br and Hci. The maximum application temperature is 200 °C for high coercivity grades. Nd-Fe-B magnets are more prone to oxidation than any other magnet alloys. If Nd-Fe-B magnet is to be exposed to humidity, chemically aggressive media such as acids, alkaline solutions salts and harmful gases, coating is recommended. It is not recommended in a hydrogen atmosphere.
Applications of Neodymium Magnets
| Attributes of Neodymium Material
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Sintered Neodymium Magnets
Tolerances
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.
Machining
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.
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| Neodymium Dic Magnets | Neodymium Block Magnets | Neodymium Ring Magnets | Neodymium Rod Magnets | ||||
| Neodymium disc magnets are the strongest permanent rare-earth magnets available today and are available in an extensive range of strengths from N35 to N52. | Neodymium block, bar, rectangular / rectangle, and cube magnets are the strongest commercially available rare earth magnets, and they are incredibly powerful relative to their size. | Strong Neodymium ring magnets, versatile and allow for smaller designs They work well as speaker magnets, holding magnets, and more. | Neodymium rod magnets are strong, versatile rare-earth magnets that are cylindrical in shape, where the magnetic length is equal to or larger than the diameter. |
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| Neodymium Segment Magnets | Neodymium Cube Magnets | Neodymium Sphere Magnets | Neodymium Stepped Magnets | |||
| Strong neodymium arc segment magnets are curved magnets with multiple possible magnetization directions. mostly used in voice coil motor, permanent magnet motors, generators, wind turbines, torque couplings, and other applications. | Cube rare earth neodymium magnets are incredibly powerful for their size, with a strong pull strength. are used as medical magnets, sensor magnets, robotics magnets, and halbach magnets. | Neodymium Sphere Magnets are excellent as holding magnets, medical magnets, consumer electronics magnets, and hobby magnets. Excellent selection of strong rare earth permanent sphere and ball magnets in various sizes. | Strong neodymium stepped magnets have stepped edges and provide a good attachment solution for many applications. providing multiple magnetic poles on the surface for enhanced magnetic field distribution. |
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| Neodymium Sew-in Magnets | Neodymium Tube Magnets | Neodymium Mitre Magnets | Neodymium Cone Magnets | |||
| Strong neodymium sewing magnets are specially designed as clasps or attachments to fabrics and are used in adaptive clothing, curtains, backpacks and more. Our strong sew-in neodymium disc and block magnets are shrink-wrapped in waterproof PVC foil. | Our neodymium tube magnets are very strong and available in all shapes and sizes. are designed to collect & remove small ferromagnetic contaminants & unwanted ferrous metals & particles from free-flowing products. | Super strong neodymium mitre magnet with 45 degree bevel on one face specially designed for motor designers, engineers and inventors. are specifically engineered with angular cuts, allowing them to seamlessly fit together at corners or edges. | The Neodymium Cone Magnets (NdFeB), extra strong Conical Magnets in Cone Shape allow for a concentrated magnetic force on the smaller face of the magnet. Cone Magnetsare used as R&D magnets, sensor magnets, and robotics magnets. |
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| Neodymium Special Magnets | Neocube Magnets | ||||
| We recommend our self-adhesive neodymium magnets. They have a strong adhesive on the back that allows you to glue these adhesive magnets onto various surfaces. combine great magnetic strength with a peel-off adhesive strip on the back. Just peel and stick! | Special Shape Neodymium Magnets are designed with an irregular or non-standard shape, such as a Triangle, Hexagon, Oval shape, etc., to satisfy specific requirements in various applications. | These sturdy and high-quality neocube ball magnet are made of neodymium, iron, boron, etc for a durable structure. Neodymium ball magnets are super magnets and have a very large magnetic force. They are known as desk toys among magnets and are great for experiments, model … |
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