Neodymium Magnets in VCM (Voice Coil Motors)
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Neodymium Magnets in VCM (Voice Coil Motors)


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Product Introduction

VCM (Camera focus mechanism)

Voice coil motors are normally used to drive audio speakers.  VCM is also used in other applications where precision is important.

Autofocus camera typically use Voice Coil Motors (VCMs) because VCMs are very fast and precise over short distances, and they are designed to move the speaker dome the same way a camera lens moves. Each camera's autofocus motor uses 2-4 magnets.

Magnet Attribute Parameter
Neodymium Magnets in VCM (Voice Coil Motors)
Application Area

Consumer electronics: Electronics are one of the traditional applications of high-performance neodymium magnets. Taking smartphones as an example, there are over 10 components using neodymium magnets,

For example, microphones, micro speakers/receivers, vibration motors, wireless chargers, Bluetooth headphones, phone camera focusing, sensors, and so on. With the progress of science and technology, more and more smartphone accessories are made of neodymium magnets.


Different Shapes of Neodymium Magnets

Below are some common shapes of neodymium magnets. If you need to customize special shapes, please contact us and we will customize the best solution for you!


Packaging & Shipping

Export Standard Cartons are supplied with foam well protected. We can make the packages according to customer's request.
Standard sea and air packages are available.





Magnetization Direction

The following are the conventional magnetization methods. If there are special magnetization requirements, please contact us for consultation!


Test Instruments

Shine Magnetics has focused on quality control since its founding. Necessary and strict checks and tests are taken in all production processes to make sure any products made by us are trouble free. To work with Shine Magnetics is to get the most reliable supplier of magnetic products. It goes without saying that our magnetic products comply with the highest quality standards. We are working continually to improve the quality and process of the products.

Neodymium Test Instruments

B-H Curver


Plating Testing


Aboving Tests Could be made as per customers’requirements:

HAST Test: Test Condition: 132.9℃, 95% humidity, 2.9 ATM, 7 days

Weight Loss: 3mg/cm2

Regular Coatings


Properties Chart


Permanent Magnets Properties Chart

Permanent Magnets Properties Chart

*Shine Magnetics made the mass production of neodymium magnet(N52,N52M,N52H, N48SH, N45UH, N40EH, 33AH). We owns the most complete set of manufacturing facilities for timely producing tailored magnets that customer need.

*The highest grade of shine neodymium magnets retain a max working temperature of 220℃.

*After 168 hours of HAST test ( 2atm, 100%RH, 120℃) on the no coating N45SH NdFeB magnet, the weight loss is less than 3 mg/cm³. We always produce NdFeB magnets with high anti corrosion characters and low temperature coefficiency.

Physical Properties
Density 7.4 ~7.7 g /cm ³ Hardness 560 ~ 650 HV
Resistivity 120 ~ 160UΩ Thermal Conductivity 7 ~ 10 W / MC
Max Working Temperature 80 ~ 240 ℃ Curie Temperature 320 ~ 395 ℃
Br Temperature Coefficient 0.08 ~ 0.12% / ℃ iHC Temperature Coefficient 0.34 ~ 0.75% / ℃
Compressive Strength 1000 ~ 3000 N / mm ³ Bending Strength 250~ 400 N / mm ³
Young's Modulus 150~160 KN Situation Magnetization 30 ~ 40 MGOe
Magnetic Properties Parameters


Production Process Of Sintered Nd FeB Magnet


About Us


We are a creative magnetic solution supplier. We specializes in researching, developing and producing magnets and magnetic products used in different industrial and customers`applications. Relying on right knowledge and experience in the field, aiming at the potential demands from customers, integrating the intelligence of our know-how experts, We have produced well recognized magnetic products.


Our product testing meets quality standards.

We are constantly trying to improve ourselves in new thoughts, new technology and new working methods.
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  • No.35, Sancun Road, Gaoqiao, Haishu District, Ningbo China
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