Product Overview & Application Scenarios
The countersunk hole design allows for secure and flush mounting using standard screws, ensuring easy installation and reliable mechanical fixation.Advanced corrosion-resistant surface coatings provide excellent protection against moisture, oxidation, and environmental exposure, extending service life in demanding conditions.
Key Performance Advantages
High holding force and torque output, enabling stable fixation of metal components under vibration or load
Strong magnetic energy density, a core advantage of NdFeB magnets compared to ferrite or AlNiCo alternatives
Durable construction, combining mechanical strength with long-term magnetic stability
Typical Applications
Industrial applications
Securing safety guards and protective covers
Fixing metal panels and plates
Holding components in position during operation or maintenance
Residential and commercial use
Magnetic latches and closures
Tool organization in garages and workshops
Retaining heavy doors or access panels
Material Neodymium (NdFeB)
|
Product Name |
corrosion resistant round countersunk magnets |
|
Magnetic Grade |
N42 (Br ≥ 13.5 kGs, Hcj ≥ 12 kOe) |
|
Thickness |
D 8mm x 3mm |
|
Countersunk Hole |
3mm |
|
Dimensional Tolerance |
Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm |
|
Magnetisation Direction |
Axially Magnetised |
|
Polarity |
Countersunk Face North |
|
Operating Temperature |
≤80°C (high-temp version available) |
|
Density |
≥7.5 g/cm³ |
|
Surface Magnetic Field |
3800 ±200 Gauss (measured with TM-801 Gauss meter) |
|
Magnetic Flux |
2.3 mWb (measured with fluxmeter) |
Manufacturing Process
3.1 Magnetization & Magnetic Field Control
A full range of magnetization options is available, including:
- Axial magnetization
- Radial magnetization
- Multi-pole magnetization
- Segmented magnetization
- Magnetization processes are precisely controlled to ensure full saturation and stable magnetic performance.
- Magnetic field design focuses on field uniformity and controllability within the working air gap.
Optimized magnet orientation and dedicated tooling help:
Minimize local field deviations
Maximize system-level magnetic performance
Reduce the risk of irreversible demagnetization
3.2 Precision Machining & Dimensional Control
After sintering, magnets undergo precision machining using CNC grinding and diamond grinding wheels.
Critical features such as outer diameter, thickness, and countersunk geometry are controlled within tight tolerances.
Cutting and grinding operations are applied as required to achieve final geometry and dimensional accuracy.
Process Cooling & Machining Safety
Continuous coolant application is used during machining to:
- Control heat generation
- Reduce surface oxidation risk
- Minimize machining-induced stress
- Improve surface finish quality
- Controlled cooling is essential for safe and stable machining of brittle sintered NdFeB magnets.
Appearance & Dimensional Inspection
Visual Inspection: Under standardized lighting, trained QC staff check for cracks, chipping, inclusions, pores, or oxidation
Image Measurement System: High-res cameras and algorithms conduct non-contact 2D measurements, especially for complex or irregular shapes, ensuring efficiency and objectivity in mass production.
Customer Service Commitment
- Dongguan Jin Kun Magnet values long-term partnerships and proactive service.
- Quick response and clear communication
- Flexible customization for special applications
- Support from design to mass production
- Continuous after-sales follow-up
- Reliable support for both standard and complex projects
FAQ
Q1. What coating failures are most common in field applications?
Failures usually result from micro-cracks, edge damage, or incomplete sealing, especially in high-humidity or thermal cycling environments.
Q2. How should magnets be handled in automated assembly lines?
Key points include controlled spacing, non-magnetic tooling, soft-contact handling, and demagnetization-safe storage orientation to prevent damage or performance loss.
Q3. When is radial magnetization preferable to axial magnetization?
Radial magnetization is preferred in motors and rotating systems where uniform circumferential magnetic fields are required, despite higher manufacturing complexity.
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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