Product Overview & Application scenarios
Diametrically magnetized ring magnets are easy to install and provide a strong magnetic hold, making them suitable for a wide range of applications. In industrial environments, they're often used to secure safety covers, fix metal plates in place, or hold components steady during use. Around the house, they work well for magnetic latches, organizing garage tools, or keeping heavy doors closed. In retail, they're commonly used to mount signs and displays where strength and flexibility are important. Their durable design and wide range of uses make them a practical solution for many everyday tasks.
1.1Application scenarios
Electric Vehicles (EVs)
Traction motors, auxiliary motors, sensors, and power electronics systems
Wind Power Generation
Permanent magnet generators for onshore and offshore wind turbines
Industrial Motors & Automation
Servo motors, stepper motors, linear motors, robotics, and CNC equipment
Consumer Electronics
Smartphones, tablets, laptops, speakers, microphones, vibration motors, and hard disk drives
Techinical Specification
|
Product Name |
diametrically magnetized ring magnets |
|
Magnetic Grade |
N42 (Br ≥ 13.5 kGs, Hcj ≥ 12 kOe) |
|
Thickness |
D16mm x 5.5mm |
|
Countersunk Hole |
5.5mm |
|
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) |
Magnetization
Magnetization Patterns and Directions
· Sintered NdFeB magnets are anisotropic by nature and can only be magnetized along a predefined orientation.
· · The magnetization direction is determined during design, based on the magnet's geometry and its intended application.
· · The most common magnetization modes include:
Axial magnetization
Thickness-direction magnetization
· Cylindrical and disc-shaped magnets are typically magnetized axially.
· · Square and rectangular magnets are generally magnetized through their thickness.
▲ In addition to standard magnetization modes, NdFeB disc magnets can also be:
Radially magnetized
Diametrically magnetized, especially for applications such as rotary position sensors that require specific magnetic field distributions.
● Beyond simple two-pole magnetization, sintered NdFeB magnets can be:
Multi-pole magnetized
Segmentally magnetized to achieve customized magnetic field profiles.
● Ring-shaped sintered NdFeB magnets may be magnetized in several ways, including:
Axial magnetization
Radial magnetization
Segmented radial magnetization
Customization & Technical Services
▼ We offer comprehensive customization capabilities, including:
- Tailored magnet geometries and dimensions
- Customized coating and surface protection systems
- Application-specific magnetization methods
- Controlled magnetic performance to meet precise design requirements
▼ Value-added services are available to support product integration and quality control, including:
- Laser marking for identification and traceability
- Pull-force and magnetic performance testing
- Customized packaging solutions
▲ Our capabilities support traceability, quality assurance, and efficient integration into customer systems.
Frequently Asked Questions:
Q1. How tight are the dimensional tolerances for NdFeB magnets?
Answer:Typical dimensional tolerances for sintered NdFeB magnets are:
±0.05 mm for small sizes
±0.1 mm for larger sizes
Tighter tolerances are possible with additional machining but will increase cost and lead time.
Q2. Can NdFeB magnets be machined after magnetization?
Answer:No. NdFeB magnets should never be machined after magnetization.
Machining magnetized magnets is dangerous and may cause chipping, cracking, or injury due to strong magnetic attraction.
All machining operations must be completed before magnetization.
Q3. What causes chipping or cracking in NdFeB magnets?
Answer:NdFeB magnets are hard and brittle. Chipping or cracking can be caused by:
Direct magnet-to-magnet impact
Insufficient packaging protection
Improper handling during assembly
Using spacers and proper packaging significantly reduces this risk
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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