Product Overview & Application examples
The magnet is manufactured using advanced wire cutting, center-less grinding, and double-disc grinding processes, ensuring neat edges and uniform dimensions. Surface treatment includes multi-layer metal coating (Ni+Cu+Ni) or optional Ni coating, effectively preventing oxidation and corrosion from environmental factors, thereby extending the product's service life.
These high quality cube magnets exceeded our expectations in high-speed motor applications. The strong magnetic force and precision arc shape made assembly seamless, and the epoxy coating provided excellent durability against corrosion. Ideal for our brushless motor production line
Technical Specifications
|
Product Name |
High quality cube magnets |
|
Material Grade |
N42 (Br ≥ 14.2 kGs, Hcj ≥ 12 kOe) |
|
Dimension |
Customize |
|
Dimensional Tolerance |
±0.05 mm (length/width/thickness) |
|
Operating Temperature |
≤80℃ (high-temperature versions customizable) |
|
Density |
≥7.5 g/cm³ |
|
Surface Magnetic Field |
3200 ± 200 Gauss (measured with Japanese TM-801 Gauss meter) |
|
Magnetic Flux Value |
2.3 mWb (measured with fluxmeter) |
Magnetic Performance and Engineering Significance
Maximum Energy Product ((BH)max)
The maximum energy product ((BH)max) is the most comprehensive indicator of a magnet's overall performance capability. It reflects the maximum magnetic energy that the magnet can deliver per unit volume.
A higher (BH)max enables engineers to design compact, lightweight, and high-efficiency magnetic systems, making it particularly valuable in applications where space and weight are limited, such as electric vehicles, aerospace systems, and high-end consumer electronics.
(BH)max serves as a key reference parameter when balancing magnetic strength, size constraints, and cost considerations.
Temperature Coefficient and Operating Temperature Grade
NdFeB magnets exhibit temperature-dependent magnetic behavior, typically characterized by the temperature coefficient of remanence and coercivity.
As temperature increases, magnetic properties gradually decrease. Therefore, selecting an appropriate operating temperature grade (such as N, H, SH, UH, EH, or AH) is essential to ensure stable performance under service conditions.
Manufacturing Process
Magnet performance depends not only on material composition but also on manufacturing process control.
Sintered vs Bonded NdFeB:
Sintered NdFeB offers high density and superior magnetic performance for industrial applications
Bonded NdFeB provides greater shape flexibility with lower magnetic output
Oriented Pressing & Anisotropy:
Magnetic field alignment during pressing orients crystal grains
Anisotropic structure significantly improves remanence and energy product
Orientation quality directly affects performance consistence
Sintering Density & Performance
Higher density reduces internal porosity
Improved density enhances both magnetic and mechanical properties
Density control is critical for stable performance
Magnetization Options:
Axial magnetization
Radial magnetization
Multi-pole magnetization
Shapes, Dimensions & Machining Capability
Advanced machining ensures magnets meet design and assembly requirements.
Available shapes: block, disc, ring, arc, custom profiles
Dimensional tolerance: ±0.05 mm depending on design
Flatness and perpendicularity controlled per drawing
Capable of small sizes, thin sections, and complex geometries
CNC machining, wire cutting, and precision grinding supported
Quality Verification Process:
Raw material stage: composition analysis and magnetic verification
Production stage: process parameter control and batch sampling
Pre-shipment verification:
Magnetic performance consistency testing
Dimensional accuracy and visual inspection
Coating adhesion and corrosion resistance testing
Quality Support:
Batch inspection reports available
Customer-specified testing supported
Pre-Sales & After-Sales Service for NdFeB Rare Earth Magnets
We are committed to providing comprehensive pre-sales and after-sales support for rare earth NdFeB magnets, ensuring reliable application performance and long-term stability. Our service covers the entire process, from initial inquiry through full product lifecycle management.
Pre-Sales Support
- Work closely with customers to understand application requirements, operating conditions, and performance expectations
- Provide professional recommendations on magnet grade, shape, coating, tolerance, and magnetization direction
- Support design validation and product selection with technical drawings, samples, and performance data
After-Sales Support
Deliver timely technical assistance and ongoing quality assurance
Provide guidance on application, handling, and performance evaluation
Conduct root cause analysis and implement corrective actions promptly in the event of quality issues
Continuously incorporate customer feedback to improve product reliability and overall satisfaction
FAQ
Q1. Why are NdFeB magnets often excluded from rework or reuse processes?
Answer:Mechanical damage, partial demagnetization, or coating compromise during removal makes reuse unreliable. Reused magnets pose high risk in precision or safety-critical applications.
Q2. How do handling practices affect micro-level magnet damage?
Answer:Impact between magnets or contact with ferromagnetic tools can cause micro-chipping invisible to the naked eye. These micro-defects often become corrosion initiation points later in the product life cycle.
Q3. What design compromises are common when switching from SmCo to NdFeB?
Answer:While NdFeB offers higher energy density and lower cost, compromises may include reduced temperature margin, higher corrosion sensitivity, and tighter assembly control requirements.
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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