Product overview & Application Scenarios
High remanence cylindrical magnets offer a powerful and compact magnetic solution for home projects, including creating magnetic fixtures, organising tools, or securing lightweight items. In the professional world, they are crucial in manufacturing, engineering, and product design, where their magnetic strength and precision are essential for holding and positioning small components. Furthermore, they are used in the energy sector, particularly in the development of renewable energy devices, where their magnetic force contributes to efficient operation. These magnets are utilised across various industries, making them a reliable choice for both consumers and businesses.
Technical Parameters
|
Product Name |
high remanence cylindrical magnets |
|
Magnetic Grade |
N42 (Br ≥ 13.5 kGs, Hcj ≥ 12 kOe) |
|
Dimensions |
D - 14.35 x 3.49mm (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 |
|
Surface Magnetic Field |
2450 ±200 Gauss (measured with TM-801 Gauss meter) |
|
Magnetic Flux |
2.3 mWb (measured with fluxmeter) |
2.1 Magnet Grade: N42
High remanence cylindrical magnets offer a balanced combination of strength and versatility, with a maximum energy product of around 42 MGOe. Well-suited for various applications, including motors, sensors, and precision assemblies, they deliver consistent magnetic performance. Their reliable field strength makes them a preferred choice for both consumer electronics and technical equipment. Widely adopted across industries, N42 magnets are valued for their dependable and efficient performance.
Manufacturing Process
The product is manufactured through the following key processes:
● A high-speed grinding wheel shapes the magnet's surfaces with tight dimensional tolerances.
● Coolant fluid is applied to control heat, reduce surface stress, and ensure a smooth finish.
● The result is a uniform, precisely dimensioned magnet with clean edges-ideal for high-performance applications.
▼ This precision step is essential for ensuring that the final magnets meet strict quality standards for use in motors, sensors, electronics, and aerospace components
Packaging & Transportation
NdFeB magnets are brittle and magnetically active, requiring a controlled packaging process to prevent mechanical damage and magnetic interference.
Packaging Steps
Magnet Orientation Control:
Magnets are aligned and fixed to reduce internal magnetic stress.
Layered Separation:
Non-magnetic spacers are used between layers to avoid collision.
Anti-Corrosion Protection:
Vacuum bags or desiccants are added for humidity-sensitive applications.
Reinforced Carton Packing:
High-strength cartons or wooden cases are selected based on weight.
Transport Compliance Check:
Packaging is verified against magnetic field limits if required.
Usage Precautions
- Handle gently: Avoid impacts/drops (brittle material).
- Prevent pinching: Slide magnets apart-do not pry.
- Polarity check: Install correctly to avoid malfunctions.
- Avoid moisture/acids: Store in dry, mild environments.
- Keep away from sensitive devices: Hard drives, IC cards, pacemakers, etc.
FAQ
Q1. How does grain alignment affect magnetic performance consistency?
Grain alignment determines the degree of magnetic anisotropy. Poor alignment reduces Br and increases batch variation. Consistent alignment during pressing and sintering is critical for achieving stable performance, especially in high-coercivity grades.
Q2. Why do magnets with identical drawings show different demagnetization behavior?
Demagnetization behavior depends on more than geometry. Internal factors such as coercivity margin, local flux concentration, and magnetic circuit design strongly influence stability, even when external dimensions are identical.
Q3. What is the practical difference between Hcj margin and operating margin?
Hcj margin refers to the material's intrinsic resistance to demagnetization, while operating margin considers real-world conditions including temperature, reverse fields, and mechanical stress. A safe design requires margin in both areas.
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