china bonded ndfeb magnets neodymium magnets manufacturer & supplierBonded 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.

Bonded NdFeB Magnets’ Grades and Their Magnetic Properties

GradeBrHcbHcj(BH)maxTw
kGsTkOekA/mkOekA/mMGOekJ/m3°C
HGT-127.0-7.60.70-0.765.5-6.5438-5178-11637-87510.0-11.080-88≤160
HGT-116.7-7.30.67-0.735.3-6.0422-4788-11637-8759.8-10.578-84≤160
HGT-10H6.2-6.80.62-0.685.4-6.0430-47811-14875-11158.8-9.570-76≤180
HGT-106.5-7.10.65-0.715.2-6.0414-4788-10637-7969.0-9.772-77≤160
HGT-96.3-6.90.63-0.695.0-5.8398-4628-10637-7968.6-9.368-74≤160
HGT-8H6.0-6.60.60-0.664.8-5.8382-46210-13796-10357.5-8.560-68≤180
HGT-86.2-6.80.62-0.685.0-5.8398-4628-10637-7967.8-8.862-70≤160
HGT-75.8-6.50.58-0.654.4-5.2350-4146-9478-7167.0-8.056-64≤160
HGT-65.3-6.00.53-0.603.7-4.6295-3666-9478-7165.9-6.847-54≤160
HGT-54.8-5.50.48-0.553.2-4.0255-3185-8398-6374.8-5.538-44≤160
HGT-44.2-5.00.42-0.502.8-3.6223-2875-8398-6373.5-4.528-36≤160
HGT-33.5-4.30.35-0.432.4-3.3191-2635-8398-6372.6-3.621-29≤160
HGT-23.0-3.80.30-0.382.0-3.2159-2555-8398-6371.9-3.015-24≤160

Note:
∗ The data in the above table were samples’ results tested at the temperature of 20 °C.
∗ The temperature coefficients of Br and Hcj are α(Br): -0.10~-0.12 %/ºC and β(Hcj): -0.40~-0.60 %/ºC, respectively.
∗ The above data are only for reference, magnets can be tailored according to customers’ personalized requirements.

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Ring Magnets

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Abnormal Shape Magnets

bonded NdFeB magnets with metal, hall effect magnets, sensors magnets, encoders magnets

Magnetic Assemblies with Metal

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Rotor Assemblies

bonded NdFeB arc segment magnets

Arc/Segment Magnets

bonded NdFeB block rectangular magnets

Block/Rectangular Magnets

Note:
∗ Other shapes of bonded NdFeB magnets can also be tailored according to customers' specific requirements.

Bonded NdFeB magnets’ most common coating is epoxy. In addition, Teflon and Parylene coating types are also available.

Some Physical Properties of Bonded NdFeB Magnets

ParameterUnitValue
Density (ρ)g/cm34.5-6.5
Curie Temperature (Tc)ºC300-350
Recoil Permeability (μrec)-1.20
Rockwell Hardness (HR)MPa35-45
Compressive Strenght (σbc)MPa800-1000
Tensile Strength (σb)MPa200
Thermal Expansivity (α)10-6/ºC1-2

Note:
∗ The above data are only for reference, specific magnets maybe have different values.