Product Overview & Application scenarios
The high coercive force (Hcj) of the NdFeB material ensures reliable magnetic output even in applications exposed to elevated temperatures, vibration, or opposing magnetic fields, making these magnets well suited for demanding industrial and commercial environments. Their countersunk mounting design allows secure, flush installation using standard fasteners, combining magnetic adhesion with dependable mechanical fixation.
Thanks to the high energy density of rare earth NdFeB, these magnets achieve powerful holding force in a compact form, enabling efficient use in space-constrained designs. Precision machining guarantees consistent dimensions, accurate countersink geometry, and repeatable performance across batches.
Typical application areas include:
- Fixation of safety covers, access panels, and metal plates in industrial equipment
- Positioning and stabilization of components during operation or maintenance
- Magnetic latching and closure systems requiring long-term reliability
- Mounting of signs, displays, and fixtures where strong holding force and easy installation are required
Material Neodymium (NdFeB)
|
Product Name |
high coercive force 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) |
Why Choose us ?
Dongguan Jinconn New Material Holdings Co., Ltd. is a publicly listed high-tech enterprise specializing in the integrated R&D, manufacturing, and sales of rare earth permanent magnets. Located in Xiaohe Industrial Zone, Daojiao Town, Dongguan, Jinconn serves customers throughout China and across global markets with advanced magnetic solutions.
With over 20 years of dedicated experience in magnet manufacturing, Jinconn has built strong technical expertise in material formulation, process optimization, and application development-particularly in NdFeB rare earth magnets-allowing us to precisely meet the performance requirements of diverse industries.
We operate under a strict and comprehensive quality control system, covering raw material selection, in-process monitoring, and final inspection to ensure consistent product quality and reliability. Our strong customization capability enables us to deliver tailor-made magnetic solutions based on customer-specific designs, magnetic properties, and application environments.
Customization & Engineering Support
Beyond supplying magnets, we provide application-oriented engineering support throughout the project lifecycle. At the early design stage, we assist with magnet material selection based on operating temperature, demagnetization risk, magnetic circuit configuration, and lifetime requirements, recommending appropriate grades and performance ranges.
We support magnetic circuit optimization to improve flux utilization, reduce demagnetization risk, and avoid unnecessary over-specification. For new developments and validation phases, sample production and small-batch prototyping are available to support rapid design iteration and performance verification.
Our engineering approach focuses on achieving an optimal balance between performance, reliability, and cost through informed material selection, structural optimization, and process control.
Usage Precautions?
⚠ Safety & Handling Guidelines
Prevent Damage:
Magnets, especially neodymium types, are strong but fragile. Avoid dropping, striking, or allowing them to snap together forcefully, as they can easily chip, crack, or break.
Minimize Risk of Injury:
When separating strong magnets, never try to pull them apart directly. Instead, slide them sideways to reduce the force required and prevent pinched fingers or sudden releases that could cause harm.
Verify Magnetic Polarity:
Before installing or using magnets in equipment, check the polarity to ensure correct orientation. Installing magnets with the wrong polarity can lead to malfunction, reduced performance, or even damage to your devices.
Safe Storage:
Store magnets in a cool, dry place away from moisture, acids, and corrosive chemicals. Use non-magnetic containers when possible, and keep them securely separated to avoid accidental impacts.
▲ Please contact us for free samples, magnet customization solutions, and MSDSRoHS, ISO 9001, QC080000, IATF 16949, ISO 14001, ISO 27001 or other relevant certificates!
FAQ
Q1. Why does magnet performance drift over long-term use even below rated temperature?
Long-term exposure to thermal cycling, vibration, and magnetic load changes can cause gradual magnetic relaxation, especially in designs with minimal coercivity margin.
Q2. How does thermal cycling affect NdFeB magnets?
Repeated heating and cooling may lead to microstructural stress, coating fatigue, and slight coercivity loss, particularly in harsh or enclosed environments.
Q3. Why do magnets from the same batch show force variation?
Variations are often caused by assembly conditions, air-gap sensitivity, test fixture differences, or magnet orientation, rather than intrinsic material inconsistency
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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