Black epoxy coated NdFeB bar magnet featuring high magnetic strength and enhanced corrosion resistance, designed for industrial assemblies, automation systems, and precision applications requiring stable and reliable performance.
Product Overview
40mm x 13.4mm x 3mm black epoxy coating bar magnets
Black epoxy coated NdFeB bar magnets are specifically designed for applications requiring enhanced corrosion protection and stable linear holding force. The epoxy coating provides superior resistance to moisture, chemicals, and surface wear, making these magnets suitable for harsh or exposed environments.
The bar-shaped design ensures uniform magnetic flux distribution and strong contact holding, supporting precise alignment and secure fixation. These magnets are commonly used in industrial fixtures, enclosures, electronic assemblies, and structural positioning where standard nickel-plated magnets are insufficient.
By combining high magnetic energy with a durable black epoxy coating, these NdFeB bar magnets deliver reliable performance, extended service life, and improved environmental adaptability in professional and technical applications.
Material Neodymium (NdFeB)
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Product Name |
black epoxy coating bar magnets |
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Magnetic Grade |
N42SH (Br ≥ 13.4 kGs, Hcj ≥ 12 kOe) |
|
Dimensions |
L40mm x 13mm x 3mm (customizable) |
|
Dimensional Tolerance |
Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm |
|
Operating Temperature |
≤80°C (high-temp version available) |
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Density |
≥7.5 g/cm³ |
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Surface Magnetic Field |
3800 ±200 Gauss (measured with TM-801 Gauss meter) |
|
Magnetic Flux |
2.3 mWb (measured with fluxmeter) |
Manufacturing Process
Surface Coating
To enhance corrosion resistance, magnets are coated with protective layers such as Nickel-Copper-Nickel, Epoxy, Zinc, or other specialized coatings, depending on application and environmental requirements.
Magnetization
Finished magnets are magnetized using high-energy pulsed magnetic fields. Various magnetization patterns, including axial, radial, and multipole, can be applied according to specific application needs.
Quality Inspection
Each magnet undergoes rigorous inspection, including dimensional measurement, magnetic property testing, coating evaluation, and environmental performance assessment, ensuring consistent quality and reliability.
After-Sales Service & Technical Support
Our after-sales service for NdFeB permanent magnets is built around technical responsibility, application understanding, and long-term performance assurance. We do not treat delivery as the end of service, but as the starting point of continuous support.
Technical Support Throughout the Product Lifecycle
- We provide ongoing technical support from initial application validation through mass production and long-term operation.
- Assistance with grade selection based on real operating temperature, magnetic circuit conditions, and safety margins
- Support for magnetic performance optimization when operating conditions change
- Engineering-level communication for design revisions, upgrades, or cost optimization
- This ensures that the selected magnet grade remains suitable throughout the product lifecycle.
Frequently Asked Questions:
Q1. How is process consistency maintained during manufacturing?
Critical process parameters such as powder composition, oxygen content, sintering temperature, and machining conditions are monitored and controlled through SPC and routine inspections.
Q2. What standards are followed for reliability testing?
Reliability testing is conducted in accordance with international standards such as ISO, ASTM, and IEC, as well as customer-specific technical specifications.
Q3. HOw does reliability testing benefit end users?
Comprehensive reliability testing ensures stable magnetic performance, extended service life, reduced failure risk, and consistent quality in demanding applications such as motors, electronics, and renewable energy systems.
Contact Us：
Phone/WhatsApp/WeChat: +86 13829120676
Email: Info@jinconn.com
Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province, China.
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