Product Overview & Application Scenarios
This high coercive force ring magnet crafted from premium-grade NdFeB material, offering exceptional magnetic strength and stability. Designed with a precise inner hole and polished nickel coating, it delivers superior corrosion resistance and mechanical durability. Its high energy density and strong pull force make it ideal for demanding applications in motors, sensors, magnetic couplings, and precision engineering. The ring shape ensures uniform magnetic flux distribution, enabling efficient axial or radial magnetization as required. Available in various sizes and customizable grades (e.g., N35 to N52), this industrial use corrosion resistant fast response Thin neodymium countersunk ring -shaped magnet combines compact form with powerful performance, making it a preferred choice for both industrial and high-tech solutions where space, strength, and reliability are critical.
1.1 Application Scenarios
Magnetic Couplings & Seal Drives
Suitable for liquid pumps, mixers, and other non-contact power transmission systems.
Ensures complete sealing and reduces wear and tear.
Loudspeakers & Audio Devices
Delivers a concentrated magnetic field to optimize voice coil response.
Commonly used in high-end loudspeakers, headphones, microphones, and related equipment.
Technical Specifications
|
Product Name |
high coercive force ring magnets |
|
Magnet Grade |
N52 (Br ≥14.2 kGs, Hcj ≥12 kOe) |
|
Dimension |
D5x3mm |
|
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) |
Magnetic Flux Uniformity Verification
Magnetic Flux Uniformity Verification is a critical quality control process used in the NdFeB magnet industry to ensure that the magnetic field distribution of a magnet is consistent, stable, and meets design specifications. This process verifies that the magnetization is uniform across the entire magnet surface or volume, which is essential for reliable performance in precision applications.
Key Objectives
Ensure consistent magnetic performance from magnet to magnet
Verify correct magnetization direction and strength distribution
Detect magnetic anomalies caused by material defects or process deviations
Meet strict customer and application-specific requirements
Verification Process Steps
Step 1: Magnet Preparation
Magnets are fully magnetized under controlled conditions and stabilized before testing to eliminate transient magnetic effects.
Step 2: Measurement Method Selection
Appropriate testing methods are selected based on magnet shape, size, and application, such as surface scanning or point measurement.
Step 3: Magnetic Flux Measurement
Magnetic flux density is measured using calibrated instruments, typically including:
- Gaussmeters with Hall probes
- Flux scanners or mapping systems
- Helmholtz coils for total magnetic moment verification
Step 4: Data Mapping and Analysis
Measurement data is collected across multiple points to generate a magnetic field distribution map. Variations are compared against defined tolerance limits.
Step 5: Uniformity Evaluation
Flux deviation, peak-to-valley differences, and symmetry are analyzed to determine whether the magnet meets uniformity standards.
FAQ
Q1. What causes magnetic performance variation between batches?
Answer:
Variations may result from differences in raw materials, sintering conditions, grain alignment, or coating thickness. Strict process control and quality inspection are essential to ensure consistency.
Q2. How are NdFeB magnets tested for quality?
Answer:Testing typically includes dimensional inspection, magnetic property measurement (Br, Hcj, BHmax), flux testing, coating adhesion, corrosion resistance, and visual inspection.
Q3. What safety precautions should be taken when handling strong NdFeB magnets?
Answer:Operators should avoid sudden attraction, wear protective equipment, use spacers during storage, and keep magnets away from electronics and medical devices.
Packaging & Transportation
- Batch sorting by size and grade
- Layered separation using plastic or cardboard sheets
- Anti-corrosion treatment if required
- Bulk packing in inner boxes
- Outer cartons labeled by batch and specification
- Pallet packing for warehouse or factory delivery
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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