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304 North Cardinal St.
Dorchester Center, MA 02124
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These are indispensable
Bonded NdFeB Magnets
The sintered NdFeB magnet is the strongest permanent magnet currently available. It goes without saying that ELITE MAGNETS has neodymium magnets ready to meet your specific requirements.
- Injection Molded Magnet Capabilities
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Introduction
Bonded NdFeB magnets, i.e. bonded neodymium iron boron magnets, are those permanent magnetic materials made of rapid quenched NdFeB magnetic powders combined with resin binders (epoxy, Nylon/polyamide (PA), polyphenylene sulfide (PPS), etc). They are manufactured through a bonded process (compression, injection, extrusion or calendaring molding), so it is available to obtain complex geometries with high dimensional precision. Controlling the performance and proportion of NdFeB magnetic powders, it is able to adjust the magnets’ magnetic properties in a continuous range. Due to their complex geometries availability, high dimensional precision, uniform magnetic properties, diverse magnetization patterns, good corrosion resistance and mechanic properties, bonded NdFeB magnets are widely applied in spindle motors, micro motors, direct current (DC) motors, synchronous motors, power tools, magnetic rollers, Hall effect sensors, etc.
Product
Powerful, versatile, and cost-effective
Hot-pressed NdFeB magnets are a special kind of permanent magnet. They are characterized by high performance and precise pole transition, are Dy-free, and are manufactured using the extrusion process. Radial pole alignment is achieved through mechanical deformation. The hot-pressed NdFeB magnet is versatile, suitable for motors with rotor diameters ranging from 6 to 80 mm. It finds applications in a variety of motors, including servo motors, EPS motors, spindle motors, stepping motors, synchronous machines, DC motors, and brushless DC motors. Additionally, it is utilized in sensor applications. By replacing segment magnets and being adhered as a ring onto rotor shafts, it streamlines rotor assembly, making it simpler, more reliable, and cost-effective.
General
Setting new standards
Hot-pressed NdFeB magnets are radially oriented, anisotropic, dysprosium-free permanent magnets. They exhibit high coercivity and are among the most powerful magnets on the market. The magnet is available in various sizes of solid rings. The micrograin size of the raw material enables reducing the HRE content and thus lowering costs. Assembly is relatively simple – it consists of a single piece. Compared to sintered, radially oriented ring magnets, very small outer diameters are possible. Hot-pressed NdFeB magnets offer excellent corrosion resistance with minimal internal porosity and are heat-resistant up to 180 degrees Celsius.
Chemical Resistance
Largely Resistant
Motor oil
Organic solvents
Not Resistant
Uric acid
Acids and alkalis
Salts in aqueous solution
Technical data
What the bonded NdFeB magnet can do
The potential of hot-pressed NdFeB magnets extends beyond standalone applications. These multi-pole magnets are effortlessly integrated into assemblies, offering robust performance without requiring additional protection up to 12k RPM. Their utilization hinges on the magnetization form and the corresponding technical attributes.
NdFeB hot pressed, radial anisotropic
| Grade | Remanence Br [T] | Coercivity HcJ [kA/m] | Coercivity HcB [kA/m] | Energy Product BH(max) [kJ/m3] | Operating Temp. [°C] | Temp. Coeff. αBr [%/°C] | Temp. Coeff. βHcJ [%/°C] | Density [g/cm3] |
|---|---|---|---|---|---|---|---|---|
| min. nom. | min. nom. | min. nom. | min. nom. | max. | nom. | nom. | nom. | |
| BMNHPa-40(R) | 1.261.295 |
10401100 |
885960 |
300318 |
100 | -0.100 ~ -0.120 | -0.64 ~ -0.72 | 7.55 |
| BMNHPa-43(R) | 1.291.325 |
915975 |
870940 |
310340 |
100 | -0.100 ~ -0.120 | -0.64 ~ -0.72 | 7.55 |
| BMNHPa-48(R) | 1.361.40 |
835900 |
795865 |
340380 |
100 | -0.100 ~ -0.120 | -0.64 ~ -0.72 | 7.55 |
| BMNHPa-32H(R) | 1.121.17 |
11901250 |
805875 |
240255 |
150 | -0.090 ~ -0.120 | -0.50 ~ -0.65 | 7.55 |
| BMNHPa-36H(R) | 1.201.24 |
11601200 |
860935 |
270285 |
150 | -0.090 ~ -0.120 | -0.50 ~ -0.65 | 7.55 |
Custom Sharp: Any Shape, Any Size
No design is too complex. We produce custom magnets in rings, blocks, arcs, abnormal shapes and complete assemblies. Just provide your technical drawings, and we’ll handle the rest.
Note: ∗ Other shapes of bonded NdFeB magnets can also be tailored according to customers’ specific requirements.
Ring Magnets
Abnormal Shape Magnets
Square Magnets
Rotor Assemblies
Block/Rectangular Magnets
