Customized High-Precision Black epoxy coating compact Slot Neodymium Bar Magnet

1. Product Overview & Application Scenarios

This Customized High-Precision high torque thermal stability Black epoxy coating compact Slot Neodymium Bar Magnet is designed for precision and durability. Featuring a triple-slot structure, it offers optimal alignment and magnetic strength for a variety of modular applications, from electronic device connectors to industrial fixtures. The matte finish ensures resistance to scratches and wear, while its compact design allows for easy integration into tight spaces or detachable systems. Ideal for quick assembly and disassembly, this Customized professional grade premium quality strong magnetic force High-Precision Black epoxy coating compact Slot Neodymium Bar Magnet replaces traditional fasteners like limit pins or screws, streamlining workflows and enhancing efficiency. Its strong magnetic pull ensures reliable positioning and stability, making it an excellent choice for modular electronics, automation systems, and robotic components. With its combination of strength, precision, and corrosion resistance, it is built to last in both industrial and consumer-grade applications.

Application Scenarios

Industrial Automation & Assembly Fixtures

Used in mechanical structures for magnetic clamps, positioning bases, and assembly jigs, enabling quick disassembly and precise, non-damaging positioning.
It can replace traditional limit pins or threaded fasteners, enhancing the efficiency of tooling systems.

 Modular Electronic Devices

Applied in detachable modules, magnetic connectors, and peripheral mounting systems to enable fast structural connections and electromagnetic compatibility optimization.
Especially suited for pre-positioning design of structural components in 3C electronic devices.

Robotics & Precision Motion Systems

Used as encoder magnets or sensor excitation sources for detecting the stroke and status of robotic arms or linear actuators.
Provides high repeatability in magnetic response and positioning.

1. Product Overview & Application Scenarios

This Customized High-Precision high torque thermal stability Black epoxy coating compact Slot Neodymium Bar Magnet is designed for precision and durability. Featuring a triple-slot structure, it offers optimal alignment and magnetic strength for a variety of modular applications, from electronic device connectors to industrial fixtures. The matte finish ensures resistance to scratches and wear, while its compact design allows for easy integration into tight spaces or detachable systems. Ideal for quick assembly and disassembly, this Customized professional grade premium quality strong magnetic force High-Precision Black epoxy coating compact Slot Neodymium Bar Magnet replaces traditional fasteners like limit pins or screws, streamlining workflows and enhancing efficiency. Its strong magnetic pull ensures reliable positioning and stability, making it an excellent choice for modular electronics, automation systems, and robotic components. With its combination of strength, precision, and corrosion resistance, it is built to last in both industrial and consumer-grade applications.

Application Scenarios:

Industrial Automation & Assembly Fixtures

Used in mechanical structures for magnetic clamps, positioning bases, and assembly jigs, enabling quick disassembly and precise, non-damaging positioning.
It can replace traditional limit pins or threaded fasteners, enhancing the efficiency of tooling systems.

 Modular Electronic Devices

Applied in detachable modules, magnetic connectors, and peripheral mounting systems to enable fast structural connections and electromagnetic compatibility optimization.
Especially suited for pre-positioning design of structural components in 3C electronic devices.

Robotics & Precision Motion Systems

Used as encoder magnets or sensor excitation sources for detecting the stroke and status of robotic arms or linear actuators.
Provides high repeatability in magnetic response and positioning.

2. Technical Specifications

- Product Name: Customized High-Precision Black epoxy coating compact Slot Neodymium Bar Magnet

- Magnet Grade: N52 (Br ≥14.2 kGs, Hcj ≥12 kOe)

- Dimension: L5x4x2mm

- Dimensional Tolerance: +/-0.05 

- Operating Temperature: ≤80°C (High-temp versions available)  

- Density: ≥7.5 g/cm³  

- Surface Magnetic Field: 3,500 Gs  

- Magnetic Flux : 2.0 mWb  (Fluxmeter-tested)  

3. Surface Treatment & Coating Technology

To enhance this Customized high remanence energy efficient High-Precision Black epoxy coating compact Slot Neodymium Bar Magnet ’s corrosion resistance, surface quality, and magnetic stability, the following treatments are used:

Edge Reinforcement: Laser cladding with nickel-based alloy at magnet seams (prevents electrochemical corrosion)

Edge Rounding: Reduces magnetic field distortion

Default Coating: Triple layer Ni-Cu-Ni (customizable)

Standard Thickness: Ni (3μm) + Cu (5μm) + Ni (4μm)

Optional Coatings: Gold or silver plating for better conductivity and corrosion resistance

4. Reliability Testing

Impact & Vibration Test: Simulates shipping and usage conditions to ensure operational stability.

Constant Temperature & Humidity Test: Performed under 85°C and 85% RH for 96–500 hours. Performance and appearance are compared before and after testing.

Damp Heat Test: Evaluates resistance to high humidity and corrosion

5. Packaging & Transportation

Defect Elimination: 100% inspection using calipers, projectors, visual checks, and automated systems to reject cracked, chipped, oxidized, or coated-defective magnets.

Uniform Magnetization & Structured Arrangement: Magnets are uniformly magnetized and arranged for optimal packaging based on customer requirements to ensure performance and facilitate automated assembly.

Vacuum Sealed Packaging: Multi-layer vacuum sealing with moisture barriers, desiccants or nitrogen, prevents corrosion and magnetic interference during storage and shipping.

Customized Outer Packaging: Shock-proof, moisture-resistant, and anti-magnetic leakage packaging (e.g., multilayer cartons, plastic boxes, metal shielding) ensures compliance with international logistics standards. Each box includes a product list, labels, and tracking codes.

6. Why Choose us ？

Dongguan Jinconn New Material Holdings  Co., Ltd. is a publicly listed enterprise offering integrated R&D, manufacturing, and sales of rare earth magnets. Based in Xiaohe Industrial Zone, Daojiao Town, Dongguan, we serve clients across China and globally.

⭐20+ years of magnet manufacturing expertise

⭐Strict quality control & customization capability

⭐Multilingual technical support with global delivery

⭐RoHS and REACH compliant

7.  Usage Precautions？

⚠ Safety & Handling Guidelines

Handle with care: Neodymium magnets are brittle and can chip or crack if dropped or impacted.

Avoid injury: Always slide magnets apart—do not force or pry them to separate.

Check polarity before use: Incorrect installation may cause malfunction or damage to equipment.

Store properly: Keep in a dry, neutral environment; avoid contact with moisture, acids, or corrosive substances.

Keep away from sensitive electronics: Do not place near hard drives, magnetic cards, pacemakers, or similar devices.

8. Customization & Services

Customizable magnet dimensions, geometry, and surface coatings (including layer count, thickness, and color)

Precision magnetization orientation and adjustable magnetic field intensity

Optional laser marking for logos, part numbers, or traceability codes

Specialized packaging and pull-force testing tailored to your application needs

With deep expertise in magnetic materials, we deliver solutions for industries like EVs, smart manufacturing, and electronics. Our strong technical capabilities and product consistency have earned the trust of customers worldwide.

·  Precision Magnetics, Tailored for Performance.

If you have any magnet-related needs, we offer free customized magnet services. Please feel free to contact us at any time.

Contact Us：
 Phone/WhatsApp/WeChat: +86 13829120676

 Email: Info@jinconn.com

 Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province, China.