Product Overview & Application Scenarios
This high quality round countersunk magnet can also be referred to as a circular perforated magnet with a slot. Manufactured from high-performance N52-grade material, it features an outer diameter of 37.5mm and a thickness of 2.5mm. As a non-standard, custom-designed magnet, it can be fully tailored to meet your specifications without requiring any tooling costs.
A wide range of surface finishing options is available, including zinc plating (colored zinc, blue-white zinc, etc.), nickel plating, epoxy coating, phosphate treatment, gold plating, silver plating, chrome plating, baked enamel, and electrophoresis finishes, among others. For inquiries or customization requests, please feel free to contact us via email or submit an online inquiry.
These high quality round countersunk magnets are commonly used in precision engineering and assembly applications. The slots (also referred to as catch grooves or locating slots) allow the magnet to securely accommodate other components, such as shafts, pins, or mechanical parts, ensuring accurate alignment and stable connections in demanding setups.
Technical Specifications
|
Product Name |
high quality round countersunk magnet |
|
Magnet Grade |
N52 (Br ≥14.2 kGs, Hcj ≥12 kOe) |
|
Dimension |
37.5*2.5mm |
|
Dimensional Tolerance |
+/-0.05 |
|
Operating Temperature |
≤80°C (High-temp versions available) |
|
Density |
≥7.5 g/cm³ |
|
Surface Magnetic Field |
1,500 Gs |
|
Magnetic Flux |
2.0 mWb (Fluxmeter-tested) |
Surface Treatment & Coating Technology
NdFeB magnets are susceptible to corrosion due to their material characteristics. Surface treatments and coatings are applied to enhance corrosion resistance and extend service life
Ni–Cu–Ni Plating: Multi-layer electroplating providing reliable corrosion protection and mechanical durability.
Zinc (Zn) Plating: Economical coating suitable for dry or mildly humid environments.
Epoxy Coating: Polymer coating offering superior resistance to moisture, chemicals, and salt spray.
Phosphate Treatment: Used as a pre-treatment to improve coating adhesion.
Special Coatings: Gold, silver, parylene, or customized coatings for specific applications.
Manufacturing Process
Advanced Manufacturing of NdFeB Rare Earth Magnets
Precision alloy formulation for stable performance
Advanced powder metallurgy technology
Controlled sintering for high magnetic strength
High-accuracy machining for tight tolerances
Reliable surface coatings for corrosion resistance
Comprehensive inspection to ensure consistent quality
Packaging & Transportation
To ensure product reliability throughout handling, storage, and global logistics, Jinconn implements a comprehensive packaging and transportation system:
- Magnets are arranged to minimize magnetic attraction forces.
- Protective separators prevent surface damage and edge breakage.
- Packaging design ensures stability during storage and transport.
- Clear handling and safety markings are applied to each package.
Quality Inspection
For automotive and high-reliability applications, NdFeB magnets are subject to enhanced quality inspection and validation procedures.
The process includes raw material traceability, in-process monitoring, and final magnetic property verification. Dimensional tolerances, coating adhesion, and appearance are strictly controlled. Reliability testing such as high-temperature aging, temperature cycling, damp heat (85°C / 85% RH), vibration, and corrosion testing is performed to confirm long-term performance stability.
All inspection data are recorded to ensure full traceability and compliance with customer and industry standards.
FAQ
Q1. Why is magnet orientation marking critical for automated assembly lines?
Answer:Incorrect orientation causes immediate functional failure and often requires full disassembly. Clear and durable marking reduces assembly errors, rework, and line stoppages in automated environments.
Q2. What are common mistakes in magnet incoming inspection (IQC)?
Answer:Common issues include relying solely on surface Gauss readings, ignoring coating adhesion tests, insufficient sampling size, and using non-standard fixtures. Comprehensive IQC must combine dimensional, magnetic, and coating checks.
Q3. How does air-gap variation amplify magnet performance differences?
Answer:Small air-gap changes disproportionately affect magnetic flux density. In tight designs, minor magnet variation becomes magnified, making system-level performance more sensitive than material-level variation.z
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
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