Product Overview
These industrial NdFeB bar magnets are designed for applications requiring high holding force along a linear magnetic profile. Manufactured from rare earth neodymium material, they deliver significantly higher magnetic energy density than ferrite or AlNiCo alternatives.
The elongated bar geometry provides uniform magnetic flux distribution and extended contact area, enabling stable positioning and precise alignment in fixtures, panels, and structural assemblies. Their compact cross-section allows integration into space-restricted designs without sacrificing magnetic performance.
With consistent pull force and dimensional accuracy, these NdFeB bar magnets are widely used in industrial tooling, automation equipment, aerospace components, and engineered assemblies where reliability and performance consistency are critical.
Material Neodymium (NdFeB)
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Product Name |
Industrial bar magnets |
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Magnetic Grade |
N42 (Br ≥ 13.7 kGs, Hcj ≥ 12 kOe) |
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Dimensions |
L60mm x 5.4mm x 2.3mm (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 |
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Surface Magnetic Field |
3800 ±200 Gauss (measured with TM-801 Gauss meter) |
|
Magnetic Flux |
2.3 mWb (measured with fluxmeter) |
Manufacturing Process
3.1 Hydrogen Decrepitation
The alloy flakes undergo hydrogen decrepitation, during which hydrogen is absorbed into the material, causing it to fracture into coarse powder. This step enhances material brittleness and improves milling efficiency while preserving magnetic characteristics.
3.2 Micronization by Jet Milling
The coarse powder is further refined into micron-sized particles using jet milling in an inert gas atmosphere. Precise control of particle size and distribution is critical for achieving high coercivity and optimal grain alignment.
3.3 Magnetic Alignment and Compaction
Under a strong external magnetic field, the fine powder is compacted using axial or isostatic pressing. This process aligns the magnetic grains along a preferred orientation, significantly enhancing the magnet's anisotropic properties and energy density.
Appearance & Dimensional Inspection
Dimensional and Edge Assessment
Magnet edges and corners are reviewed to confirm proper chamfering or deburring, preventing sharp edges or structural weaknesses caused by machining.
Contamination and Cleanliness Control
Surfaces are inspected for oil residues, dust, fingerprints, or foreign particles that could interfere with bonding, installation, or downstream processing.
Sampling and Inspection Standards
Appearance inspection is conducted according to defined sampling plans and acceptance criteria, typically aligned with internal quality standards or customer specifications.
Packaging, Shipping & Compliance
NdFeB magnets are packaged using non-magnetic separators and reinforced cushioning to prevent mechanical damage
Anti-moisture protection is applied to preserve coating integrity during transportation
Magnetic shielding solutions are implemented to control stray magnetic fields
Packaging methods comply with international air freight, sea freight, and road transport regulations
Safety-focused packaging reduces handling risks throughout the supply chain
Technical Expertise & Custom Development
Technical teams provide pre-application analysis and magnet selection support
01
Magnetic circuit design assistance is offered to maximize system efficiency
02
Sampling and performance validation support customer development cycles
03
Custom magnet solutions include geometry, tolerance, magnetization, and material optimization
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Continuous technical support strengthens long-term product reliability and partnership value
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FAQ
Q1. How are test samples selected to represent production batches?
Samples are selected based on statistical sampling plans to ensure they represent normal production variation rather than best-case samples.
Q2. How are acceptance criteria defined for customer-specific applications?
Acceptance criteria are established through joint engineering reviews, taking into account operating temperature, environment, safety factors, and application risk level.
Q3. How is reliability data documented and reported to customers?
Test data is recorded in detailed reliability reports, including test conditions, measurement methods, before-and-after results, and conclusions for traceability and audit support
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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