Product Overview & Application Fields
This high-temperature-resistant neodymium bar magnet is designed for precision applications that require strong and stable magnetic performance in a compact form. Manufactured from premium rare earth NdFeB material and protected with a durable nickel coating, it offers excellent corrosion resistance, surface stability, and dimensional consistency.
The slim bar profile with smooth edges allows easy integration into sensors, actuators, motor encoders, and electronic assemblies. With high magnetic strength and consistent pull force, the magnet delivers reliable performance in industrial automation, robotics, and smart system applications, even under demanding operating conditions.
Application Fields
Position and Speed Sensors
Suitable for use in Hall effect sensors and magnetic encoders to detect rotational or linear position changes.
Especially ideal for integration into wheel speed sensors and motor feedback systems.
Electronic Locking Systems
Also applicable in smart door locks and electromagnetic safety devices, for position sensing or actuation of open-close mechanisms.
The strip magnet structure is well-suited for mounting on flat latch plates or embedded in sliding rail systems.
Technical Specifications
|
Product Name |
neodymium bar magnets |
|
Magnet Grade |
N42 (Br ≥12.9 kGs, Hcj ≥12 kOe) |
|
Dimension |
10mm x 10mm x 5mm |
|
Dimensional Tolerance |
+/-0.05 |
|
Operating Temperature |
≤80°C (High-temp versions available) |
|
Density |
≥7.5 g/cm³ |
|
Surface Magnetic Field |
2,800 Gs |
|
Magnetic Flux |
2.0 mWb (Fluxmeter-tested) |
Surface Treatment & Coating Technology
To ensure long-term reliability, environmental resistance, and stable magnetic performance, advanced surface treatment and coating technologies are essential.
Surface treatment of NdFeB magnets is designed to:
- Enhance resistance to corrosion and chemical attack
- Improve surface integrity and mechanical durability
- Extend service life under harsh operating conditions
- Ensure compatibility with downstream assembly processes
Prior to coating, magnets undergo strict surface preparation, including:
- Precision grinding and edge conditioning to reduce stress concentration
- Degreasing and ultrasonic cleaning to remove contaminants
- Chemical activation to promote coating adhesion and uniformity
Packaging and Logistics Management
Strong magnetic force and material brittleness are addressed through controlled separation and shock-absorbing packaging
Sealed packaging and humidity control measures are used to minimize corrosion risks
Magnetic shielding packaging is applied to meet international transportation safety standards
Logistics solutions are optimized for long-distance and bulk shipments
Packaging design prioritizes product safety, regulatory compliance, and handling efficiency
▲ 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.
FAQ
Q1. How does grain boundary diffusion (GBD) improve magnet performance?
GBD enhances coercivity by diffusing heavy rare earth elements into grain boundaries rather than the entire magnet, improving temperature resistance while reducing rare earth consumption and cost compared to bulk doping.
Q2. What dimensional tolerances are realistic for sintered NdFeB magnets?
Typical grinding tolerances are ±0.05 mm. Tighter tolerances are possible but significantly increase cost and scrap rates, especially for thin or complex geometries.
Q3. What causes batch-to-batch magnetic variation?
Key factors include powder particle size distribution, alignment field consistency, sintering temperature control, and magnetization process stability.
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