Industrial grade high magnetic strength permanent small Keyed Disc Magnets with Locating hole

Industrial grade high magnetic strength permanent small Keyed Disc Magnets with Locating hole

1. Product Overview

The customized industrial grade heat resistant high magnetic strength permanent small Keyed Disc Magnets with Locating hole is a high-performance permanent magnet featuring a Round disc design for secure mechanical fastening. It is manufactured using high-grade NdFeB material (e.g., N35–N52) and coated with triple-layer nickel plating (Ni-Cu-Ni), significantly improving corrosion resistance and surface durability. It is ideal for applications requiring both strong magnetic performance and robust mechanical mounting. 
The customized industrial grade high magnetic strength permanent stable small Keyed Disc Magnets with Locating hole in your second image are custom-shaped NdFeB (Neodymium Iron Boron) magnets, designed for specialized mechanical or electromechanical
assemblies.  

2. Application Field:

Consumer Electronics:

In Bluetooth speakers, earbuds, and microphones for sound generation

Inside smartphones, especially in vibration motors and closures. 

      Motors and Sensors:
 Used in rotor-stator assemblies in miniature motors and BLDC (Brushless DC) motors. Integrated into speed or position sensors (e.g., hall effect sensors). 

      Medical Devices:
Found in hearing aids, magnetic therapy pads, and some surgical tools due to compact size and strong field.

      Sensors & Detection Devices: 
Magnetic sensors, reed switches, and position detectors.

3. Technical Parameters:

4.  Manufacturing Process:

Magnetization Process:
Professional pulse magnetization equipment is used to inject strong and stable magnetic fields, ensuring the magnet meets design specifications and performs reliably under high load or high-frequency operation. 

Grinding & Fine Finishing:
Advanced precision equipment grinds the magnet surface to ensure smoothness and tight dimensional tolerances, supporting high-precision industrial applications. 

5. Surface Treatment & Plating Technologies:

Zinc Coating:
Offers enhanced chemical resistance and waterproofing, especially suitable for humid environments.

Triple Nickel Plating:
Ni-Cu-Ni electroplating dramatically enhances corrosion resistance and mechanical durability.

6. Appearance & Dimensional Inspection Standards:

Manual Inspection with Micrometer/Caliper:
Ensures dimensional accuracy per design specification.

Visual Inspection:
Performed under standard lighting to detect cracks, surface defects, or imperfections.  

Magnetic Flux Testing:
Ensures consistent magnetic strength across each production batch.

7. Reliability Testing：

Drop and Vibration Testing:
Simulates transportation and operational impact to verify product reliability in end-use conditions.

High-Temperature Demagnetization Test:
Confirms thermal stability by measuring magnetism retention under high temperatures.

           Damp Heat Test:
           Evaluates resistance to corrosion and humidity in moisture-rich environments.

8. Packaging & Transportation：

Defect Sorting:
Visual and dimensional defects are removed before final packing

Magnetizing & Arranging:
Each magnet is uniformly magnetized and packed as per customer requirements.

Vacuum Packaging:
Prevents moisture and magnetic interference during shipping and storage.

Outer Packaging:
Shock-resistant, moisture-proof, and anti-magnetic interference packaging ensures safe transportation. 

9. Usage Precautions：

Handling: NdFeB magnets are hard yet brittle—avoid dropping, collision, or edge impact.

Safe Operation:
Strong magnetic force may cause pinching—slide magnets apart instead of forcing them.

Proper Installation:
Identify and align polarities correctly to ensure stable operation.

Storage Conditions:
Avoid high temperatures, humidity, and corrosive (acid/alkali) environments.

Magnetic Interference:
Keep magnets away from sensitive equipment like hard drives, IC cards, and pacemakers.

10. Customization & Services：

Customized dimensions, shapes, coating layers/thickness/color.
Magnetic polarity and force specification.
Laser engraving for logos or serial numbers.
Encapsulation solutions and pull-force testing for specialized applications.

Why choose Jinconn magnet / what jinconn offers？

The company operates across a wide range of business areas, including the research, development, production, sales, and technology transfer of magnets and magnetic products. It also engages in the sales of hardware products, plastic components, electronic devices, and mechanical equipment, as well as import and export of goods and technologies.

As a National High-Tech Enterprise, a “Specialized and Sophisticated SME” of Guangdong Province, and a nationally recognized “Little Giant” enterprise, Jinkun New Materials possesses strong technological capabilities. To date, the company has filed 150 patent applications, including 3 international patents. These intellectual property achievements have significantly strengthened the company’s technological barriers and laid a solid foundation for its competitive position within the industry.

Please contact us for free samples, magnet customization solutions, and MSDSRoHS, ISO 9001, QC080000, IATF 16949, ISO 14001, ISO 27001 or other relevant certificates! 

Contact Us:
Phone: +86 18038225892
Email: helen@jinconn.com
Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province, China