Disk magnets, characterized by their flat circular shape with axial magnetization, are among the most versatile permanent magnet configurations used in modern industry. Their simple geometry belies the complex engineering required to produce them with consistent magnetic properties, precise dimensions, and reliable corrosion protection. Our factory's dedicated disk magnet production lines combine advanced material processing with precision machining to deliver components that excel in applications ranging from miniature sensors to industrial magnetic assemblies.
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Disk Magnets
Our factory specializes in manufacturing high-precision disk magnets for diverse industrial applications requiring flat, circular magnetic components. With 30 years of expertise in magnet production, we offer disk magnets in various diameters (from 1mm to 150mm), thicknesses, and magnetic materials including NdFeB, SmCo, Ferrite, and Alnico. Each disk magnet undergoes rigorous quality control to ensure precise dimensions, consistent magnetic properties, and durable protective coatings for reliable performance.
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Product Description
Whether you need thin disk magnets for space-constrained designs or thicker variants for maximum magnetic force, our vertical manufacturing integration ensures quality at every stage. From raw material selection (using ≥99.5% pure neodymium for NdFeB grades) to final inspection, we maintain strict control over the entire process, resulting in disk magnets that perform predictably in your applications.
Key Advantages of Our Disk Magnet Manufacturing
Precision Thickness Control
For disk magnets, thickness is often the most critical dimension affecting both magnetic performance and assembly fit. Our double-sided grinding technology achieves thickness tolerances as tight as ±0.01mm, with parallelism maintained within 0.02mm across the entire surface. This precision ensures uniform magnetic field distribution and prevents assembly issues in stacked or closely fitted applications.
Optimized Axial Magnetization
The magnetization direction is crucial for disk magnets. Our fully automated magnetization systems apply powerful pulsed fields (up to 5T) along the axial direction, ensuring complete saturation and consistent polarity alignment. For multi-pole disk magnets, we employ specialized fixtures to create precise radial or custom magnetization patterns with sharp transitions between poles.
Enhanced Edge Protection
Disk magnets are particularly vulnerable to chipping at their edges during handling and assembly. Our proprietary edge radiusing process creates slight bevels (0.1-0.3mm) that significantly reduce this risk without compromising magnetic performance. Combined with our uniform Ni-Cu-Ni electroplating that fully covers edges, this results in more durable disk magnets with longer service life.
Disk Magnet Types & Applications
Thin Disk Magnets
Thickness: 0.5mm - 3mm
Applications: Sensors, reed switches, magnetic encoders, thin consumer electronics
Key Feature: Space-saving design with sufficient magnetic field for detection applications
Standard Disk Magnets
Thickness: 3mm - 10mm
Applications: Motor rotors, magnetic holders, separators, general industrial use
Key Feature: Optimal balance of magnetic strength and mechanical stability
Thick Disk Magnets
Thickness: 10mm - 50mm
Applications: High-torque couplings, heavy-duty lifting, magnetic chucks
Key Feature: Maximum magnetic force for demanding mechanical applications
Standard Disk Magnet Specifications (NdFeB N45)
The table below shows standard sizes and approximate holding forces for our sintered NdFeB disk magnets with Ni-Cu-Ni coating. Custom sizes, grades (N35 to N52), and coatings (Zn, Epoxy, Au, etc.) are available upon request. Pull force is measured on a 10mm thick steel plate.
| Diameter (mm) | Thickness (mm) | Grade | Approx. Weight (g) | Typical Pull Force (kg) |
|---|---|---|---|---|
| 6.0 | 2.0 | N45 | 0.44 | 1.2 kg |
| 10.0 | 3.0 | N45 | 1.75 | 3.5 kg |
| 15.0 | 5.0 | N45 | 6.2 | 8.5 kg |
| 20.0 | 10.0 | N45 | 24.8 | 22 kg |
| 30.0 | 10.0 | N45 | 55.8 | 45 kg |
| Custom | 0.5 - 50 | All | Calculated | Simulated |
Important Handling Consideration
Disk magnets with large diameter-to-thickness ratios (thin disks) are more susceptible to cracking under mechanical stress. We recommend using non-ferrous tools for handling and avoiding direct magnet-to-magnet contact for larger diameters. Our protective packaging (individual plastic containers within partitioned boxes) is specifically designed to prevent damage during shipping.
Primary Applications for Disk Magnets
The flat, symmetrical design of disk magnets makes them ideal for numerous applications across various industries. Their predictable magnetic field and ease of integration contribute to their widespread use.
- Brushless DC Motors: Mounted on rotors for efficient, maintenance-free operation in automotive, industrial, and consumer applications.
- Magnetic Sensors & Switches: Used in position sensing, speed detection, and proximity switching systems.
- Magnetic Holding & Fixturing: For tool holders, jigs, fixtures, magnetic closures, and securing components during machining.
- Acoustic Devices: Speakers, headphones, and microphones where disk magnets provide the necessary magnetic field for sound transduction.
- Medical Equipment: MRI components, drug delivery systems, surgical instruments, and diagnostic devices.
- Magnetic Separation: Arranged in grids or plates to remove ferrous contaminants from liquids and powders.
- Consumer Electronics: Smartphone vibration motors, camera autofocus mechanisms, magnetic charging connectors, and smart home devices.
- Renewable Energy: Wind turbine generators and other clean energy conversion systems.
Quality Certifications & Standards
Our manufacturing processes and quality management systems are certified to international standards, ensuring our disk magnets meet the stringent requirements of global markets including automotive, medical, aerospace, and consumer electronics industries.
IATF 16949:2016 ISO 9001:2015 ISO 14001:2015 REACH & RoHS SGS Certified CP65 / EN71
Each batch of disk magnets undergoes comprehensive testing including dimensional verification (using optical projectors and CMM), magnetic property testing (hysteresisgraph), coating thickness measurement (X-ray), adhesion tests (tape test per ASTM D3359), and environmental simulation (salt spray testing per ASTM B117). Material certifications and test reports are available for all production orders.
Request Your Disk Magnet Samples & Quotation
Free Engineering Support for Custom Applications
Submit your disk magnet requirements (material, grade, diameter, thickness, quantity, coating, and magnetization) for a detailed quotation. Our engineering team can provide technical assistance with magnetic circuit design, material selection, and application optimization.
Contact Our Technical Sales Team:
WhatsApp/WeChat/Tel: +86-18133696123 | Email: zb12@magnets-world.com
Response time: Typically within 2-4 business hours. Export-grade packaging and full documentation included with all international shipments.
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