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Round Magnetic Discs
Buy Round Magnetic Discs directly from Zhaobao Magnet, a premier 30-year source manufacturer with IATF16949 certification. Producing over 8,000 tons annually, we supply high-performance custom NdFeB magnetic discs for automotive, medical, electronics, and industrial applications globally with zero middlemen.
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Product Description
Wholesale Round Magnetic Discs directly from Zhaobao Magnet—a trusted 30-year source manufacturer offering custom sizes, high-temperature NdFeB grades, and direct factory pricing. Certified under ISO9001 and IATF16949, we deliver superior magnetic consistency, rapid prototyping, and full test reports for automotive, medical, aerospace, and consumer electronics OEMs worldwide.
What Are Round Magnetic Discs?
Round Magnetic Discs represent the gold standard in permanent magnet engineering, delivering extraordinary holding power, precise dimensional tolerance, and exceptionally high flux density within a compact circular profile. Manufactured primarily from high-grade Sintered Neodymium-Iron-Boron (NdFeB) alloy, these circular permanent magnet components possess unmatched magnetic energy product values (BHmax). Unlike third-party distributors or catalog re-sellers, Ningbo Zhaobao Magnet Co., Ltd. controls the complete manufacturing chain from raw rare earth ore refining and jet-milling to precision slicing, plating, and multi-pole magnetization.
By working directly with an original source manufacturer with over 30 years of industry experience, product engineers and procurement managers eliminate supply chain markups while securing guaranteed batch-to-batch consistency. Our factory-direct engineering approach ensures that every magnetic component meets rigorous international quality benchmarks, including IATF 16949 and ISO 9001 standards.
Exceptional Magnetic Performance & Engineering Advantages
Modern engineering design continually demands higher operational force output within increasingly constrained physical footprints. Premium Round Magnetic Discs address this challenge by offering supreme power-to-weight ratios capable of exerting pull forces hundreds of times greater than their own mass.
The unique structural symmetry and uniform crystalline orientation of Nd2Fe14B allow for optimized axial or radial field distribution. When integrated into complex electromechanical assemblies, our high-precision components deliver measurable field performance enhancements:
Comprehensive Material Grades & Thermal Tolerances
Operating environments vary dramatically—from sub-zero aerospace enclosures to high-heat automotive engine blocks. Ningbo Zhaobao Magnet Co., Ltd. manufactures Round Magnetic Discs across a complete spectrum of standardized and super-high-grade NdFeB formulations tailored to specific temperature thresholds and coercivity requirements.
| Grade Series | Max Operating Temp (°C) | Remanence Br (mT) | Intrinsic Coercivity Hcj (kA/m) | Primary Application Fields |
|---|---|---|---|---|
| N35 - N54 | 80°C | 1170 - 1480 | ≥ 955 | Consumer Electronics, Displays, Consumer Goods |
| N35M - N52M | 100°C | 1170 - 1450 | ≥ 1114 | Acoustic Drivers, Optical Pickups, Micro-Sensors |
| N30H - N52H | 120°C | 1080 - 1450 | ≥ 1353 | Precision Servo Motors, Power Tools, Actuators |
| N30SH - N54SH | 150°C | 1080 - 1480 | ≥ 1353 / 1592 | Automotive Powertrain Sensors, Automation Motors |
| N28UH - N54UH | 180°C | 1020 - 1480 | ≥ 1990 | EV Traction Motors, Wind Power Generators |
| N28EH - N48EH / N45AH | 200°C - 240°C | 1020 - 1380 | ≥ 2387 / 2785 | Aerospace Positioners, Extreme Heat Assemblies |
Developed in technical collaboration with the Chinese Academy of Sciences at our dedicated engineering technology center, our proprietary alloy formulations solve long-standing industry problems regarding demagnetization loss, thermal decay, and internal performance inconsistency in large-scale production runs.
Custom Machining, Coatings & OEM Fabrication
Catalog items rarely fit custom technical specifications. As an experienced primary manufacturer, Ningbo Zhaobao Magnet Co., Ltd. specializes in engineered-to-order solutions. Our 60,000-square-meter facility is equipped with state-of-the-art wire EDM, automatic slicing, multi-axis grinding, and automated surface treatment lines.
Custom OEM Engineering Capabilities Include:
Key Application Sectors
Thanks to their incredible holding strength and structural stability, our engineered Round Magnetic Discs are integrated into mission-critical hardware across major global industries:
Why Partner with Zhaobao Magnet Group?
Choosing the right permanent magnet supplier requires evaluating long-term production stability, technical support, and strict compliance documentation. Here is why industry leaders select Ningbo Zhaobao Magnet Co., Ltd.:
Frequently Asked Questions (FAQ)
Below are technical insights and procurement guidelines regarding our high-performance Round Magnetic Discs:
Q1: What tolerances can Ningbo Zhaobao maintain during mass production?
For standard production, we achieve strict dimensional tolerances within ±0.05 mm. For high-precision automotive, optical, and medical applications, our ultra-precision slicing and multi-axis grinding process can achieve tight tolerances down to ±0.01 mm to ±0.02 mm upon request.
Q2: How do I select the right surface coating for magnetic discs in corrosive environments?
For standard indoor electronics, standard Ni-Cu-Ni (Triple Layer Nickel) or Cr3+ Zinc offers excellent value. For marine applications or high-humidity environments, we recommend Black Epoxy or Teflon (PTFE). For medical device cleanrooms and biocompatible needs, we specialize in micro-thin Parylene C coating.
Q3: How do super-high-grade NdFeB magnets prevent thermal demagnetization in high-temperature motors?
By utilizing advanced grain boundary diffusion (GBD) technology and optimized alloy formulations (such as N54SH, N54UH, N48EH, and N45AH), our engineering team elevates intrinsic coercivity (Hcj) up to ≥2785 kA/m, allowing reliable operation up to 240°C without irreversible flux loss.
Q4: What is the typical lead time for custom prototype samples vs. high-volume production orders?
Custom rapid prototype samples (e.g., 50 pieces) are typically delivered within 7 to 10 working days. Mass commercial production orders (e.g., 500,000 pieces) are fulfilled within 2 to 3 weeks, supported by our massive 8,000-ton annual capacity.
Q5: What magnetization orientation options are available for circular magnet components?
We offer multiple orientation configurations depending on your magnetic circuit design, including Axial (through the thickness), Radial, Diametrical, Multi-pole on one face, and Skewed orientation for reduced motor cogging torque.
Q6: What quality control reports and compliance documents are shipped with each batch?
Every shipment includes complete Material Inspection Certificates, Demagnetization (B-H) Curves, Salt Spray Test (SST) validation reports, RoHS/REACH compliance certification, and CMM dimensional inspection logs.
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