Neodymium Ring Magnet Dia87 x dia63 x 8mm

SKU 003 Category
DimensionsDia87 x dia63 x 8mm
Weight169.45g / Piece

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Buy neodymium ring magnets from Huiqiang Magnets – One of the earliest neodymium magnets manufacturer in China since 1994. We supply custom magnets in many shapes, sizes, and grades of neodymium magnets and assemblies. We are happy to provide our best price for you. Please note that the product show above is one of our made products for our customer, all of our products are made according customer’s requirements, unlike orders for stock magnets, custom magnet orders require a minimum purchase amount (according the specific requirements), and take about 3-4 weeks to fulfill.

NdFeB is used to manufacture the most powerful magnets per unit volume that are commercially available today. It is used where a small size and maximum power are needed. Neodymium Magnets exert very high forces and can attract each other through unbelievably large distances making them very popular for a wide range of applications including motors, generators,scientific experiments, NMR, electric cars, packaging, security, lighting, display to name a few. They also have an immense and unbeatable resistance to being demagnetised, making them ideal for repulsion applications as well as attractive applications. The magnets are triple coated(NiCuNi) for maximum protection against corrosion. Standard manufacturing tolerance is +/- 0.1mm on all dimensions.

Additional information


Sintered Neodymium-Iron-Boron (NdFeB)




Dia87 x dia63 x 8mm (Outer Diameter x Inner Diameter x Thickness)




+/- 0.05 mm


7.40 ~ 7.70 g/cm3


169.45 g

Operating Temperature

Remanence (Br)

>13.3 kGs, 1.33 T

Coercivity (HcB)

>971 kA/m, >12.2 kOe

Intrinsic Coercivity (HcJ)

>1114 kA/m, >14 kOe

Maximum Energy (BHmax)

342 ~ 366 kJ/m3, 43 ~ 46 MGOe

Vickness Hardness

500 ~ 700 HV

Compressive Strength

1000 ~ 1100 MPa

Tensile Strength

80 ~ 90 MPa

Bending Strength

150 ~ 400 MPa

Thermal Conductivity

8 ~ 10 W/(m·K)

Young's Modulus

150 ~ 200 Gpa

Electrical Resistivity C∥

1.4 ~ 1.6 μΩ·m

Electrical Resistivity C⊥

1.2 ~ 1.4 μΩ·m

Thermal Expansion C∥

4 ~ 9 x 10^-6/K

Thermal Expansion C⊥

-2 ~ 10 x 10^-6/K

B&J-H Curve

Safety Tips

     Powerful attraction forces can cause serious injury.

     Neodymium magnets are not for children.

     Neodymium magnets can affect pacemakers.

     Neodymium magnets are brittle and fragile.

     Magnets can affect magnetic media.

     Neodymium magnets can become demagnetized at high temperatures.

     Neodymium magnet powder or dust is flammable.

     Those with nickel allergies should avoid prolonged contact with magnets.

     Strong magnetic fields can interfere with compasses and navigation.

     Neodymium magnets can corrode.

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Hui Qiang Magnets – Neodymium Magnets Properties

Hui Qiang Magnets – MSDS

Hui Qiang Magnets – RoHS Declaration of compliance

Hui Qiang Magnets – REACH Declaration of compliance