Product Overview & Application Examples
This 40 × 20 × 10 mm neodymium magnet is manufactured from high-energy N50 grade NdFeB material, designed to deliver high holding force within a compact rectangular geometry. The optimized size and aspect ratio provide efficient magnetic output while supporting integration into space-constrained assemblies.
The magnet is protected with a black epoxy coating, offering enhanced resistance to corrosion, humidity, and surface wear compared to standard metallic coatings. This makes it suitable for applications exposed to variable environmental conditions or long-term service requirements.
With a maximum pull force of up to 27.28 kg under ideal conditions, this magnet is engineered for reliable holding, positioning, and fixation in demanding applications. Typical use cases include industrial fixtures, automotive components, manufacturing equipment, construction assemblies, and engineered fastening solutions, where stable magnetic performance and durability are critical.
Material Neodymium (NdFeB)
|
Product Name |
Black Epoxy Coated cube magnets |
|
Shape |
Channel, Mounting, Block, |
|
Magnetic Grade |
N50 (Br ≥ 14.6 kGs, Hcj ≥ 12 kOe) |
|
Dimensions |
L40mm x 20mm x 10mm (customizable) |
|
Dimensional Tolerance |
Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm |
|
Operating Temperature |
≤80°C (high-temp version available) |
|
Density |
≥7.5 g/cm³ |
|
Max Gauss |
1850 |
|
Pull (KG) |
17.04 |
|
Surface Magnetic Field |
3800 ±200 Gauss (measured with TM-801 Gauss meter) |
|
Magnetic Flux |
2.3 mWb (measured with fluxmeter) |
N50 Neodymium Magnet
N50 is a high-grade neodymium iron boron (NdFeB) magnet known for its very strong magnetic output in compact sizes. It is suitable for applications where maximum magnetic force is required within limited space.
Key Characteristics
Very High Magnetic Strength:
Delivers stronger magnetic force than standard grades, enabling smaller and lighter magnet designs.
Space-Saving Design:
Ideal for compact assemblies where high performance is needed without increasing size.
Standard Temperature Rating:
Designed for operating temperatures up to 80°C.
Typical Applications:
Widely used in motors, magnetic tools, sensors, speakers, and high-performance industrial assemblies
▲ Summary
N50 offers exceptional magnetic strength and allows for compact, high-efficiency designs. It is an excellent choice for customers who need maximum performance and space optimization under normal temperature conditions.
Applications Scenarios
Electric Motors & Generators
Application: Precision-engineered magnets are employed in stators, rotors, and brushless DC motors to enhance magnetic flux density, efficiency, and torque performance.
Consumer Electronics
- Application: High-performance neodymium magnets are integrated into speakers, haptic systems, vibration motors, and sensors, contributing to compact design and reliable functionality.
Apperance Inspection
Surface and Appearance Verification
All products undergo detailed appearance checks performed by qualified quality inspectors under controlled illumination. This process identifies surface defects such as micro-cracks, edge damage, internal impurities, porosity, or early-stage corrosion.
AI-Based Optical Inspection
Automated vision systems equipped with high-speed imaging and machine-learning algorithms are used to screen each part. These systems accurately identify surface imperfections, color variations, and dimensional deviations, significantly enhancing inspection efficiency while minimizing subjective judgment.
Magnetic Output Uniformity Assessment
Magnetic performance is verified using calibrated flux measurement equipment, including Hall sensors and flux measurement instruments, to confirm consistency of magnetic output across production batches and ensure stable performance in customer applications.
Protective Packaging for NdFeB Magnets
Magnets are aligned and stacked in controlled orientation to reduce magnetic attraction forces.
Separator sheets are inserted between magnets to minimize surface damage.
Bundles are tightly wrapped to prevent movement during transportation.
Packaging materials are selected to absorb shock and reduce vibration.
Final cartons are designed to maintain mechanical integrity and magnetic safety throughout logistics handling.
FAQ
How is batch-to-batch magnetic consistency ensured?
Statistical sampling and SPC (Statistical Process Control) are applied to key magnetic parameters such as Br, Hcj, and BHmax. Deviations are analyzed to maintain uniform performance across production batches.
What tests are used to evaluate thermal stability?
Thermal stability is verified through high-temperature exposure tests, thermal cycling tests, and thermal shock tests. Magnetic properties are measured after each stage to detect any degradation or irreversible loss.
How is corrosion resistance tested for NdFeB magnets?
Corrosion resistance is evaluated using salt spray testing (ASTM B117 / ISO 9227), humidity testing, and damp heat testing. These tests simulate harsh environmental conditions and verify coating effectiveness.
We're here to help!
Phone/WhatsApp/WeChat: +86 13829120676
Email: info@jinconn.com
Website: www.jinconnmagnet.com
Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong, China
Hot Tags: black epoxy coating cube magnets, China black epoxy coating cube magnets manufacturers, factory
