Our big magnets are manufactured with a proprietary sintering process that eliminates internal cracks and porosity—common issues in large-sized magnets from low-grade manufacturers. We use high-purity neodymium raw materials (≥95% purity, no recycled materials) to ensure uniform magnetic distribution across the entire surface of the large magnet, preventing weak spots that compromise performance in heavy-load applications.
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big magnets
As a leading manufacturer with 30 years of expertise in permanent magnet production, we specialize in crafting high-performance big magnets tailored for the most demanding industrial environments. Unlike standard-sized magnets, our big magnets are built to deliver exceptional magnetic strength, structural stability, and long-term durability—critical for applications like large wind turbine generators, heavy machinery lifting systems, mining equipment, and industrial motor assemblies. As a fully integrated factory, we control every step from raw material sourcing to final machining, ensuring that every batch of big magnets meets the exact dimensional and magnetic performance requirements of our global industrial clients.
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Product Description
Industrial-Grade Big Magnets: Engineered for Heavy-Duty Industrial Applications
Key Advantages of Our Big Magnets
Structural Integrity for Large Sizes
Precision Machining for Big Dimensions
Equipped with large-format CNC grinding and slicing equipment, we maintain dimensional tolerances of ±0.01mm even for big magnets up to 150mm in length/width. This level of precision ensures seamless integration into your heavy machinery or power generation systems, reducing assembly time and minimizing waste from ill-fitting components.
Customized Coating for Large Surfaces
Our fully automated electroplating lines apply a uniform Ni-Cu-Ni triple-layer coating (5μm per nickel layer) to big magnets, ensuring complete corrosion protection even for large surface areas. We also offer custom coatings like Epoxy or Zn for harsh environments such as marine or mining settings, all compliant with SGS 300+ item environmental testing standards.
Technical Specifications: Standard Big Magnets Range
The following table outlines our standard range of big magnets, covering common sizes and grades for industrial applications. Custom dimensions, grades, and magnetic performance parameters are available upon request to match your specific equipment requirements.
| Grade | Typical Size Range (L×W×H) | Remanence (Br) mT | Max. Operating Temp (°C) | Coating Type | Primary Applications |
|---|---|---|---|---|---|
| N45 | 50×50×20mm – 100×80×30mm | 1310-1350 | 80 | Ni-Cu-Ni | Industrial lifting magnets, heavy-duty clamps |
| N50H | 60×60×25mm – 120×90×35mm | 1400-1450 | 120 | Ni-Cu-Ni / Epoxy | Wind turbine generators, large electric motors |
| N48SH | 70×70×30mm – 150×100×40mm | 1380-1420 | 150 | Ni-Cu-Ni / Zn | Mining equipment, high-temperature industrial pumps |
| SmCo2:17 | 50×50×15mm – 130×80×25mm | 1050-1100 | 350 | Electroless Nickel | High-temperature heavy machinery, aerospace applications |
Quality Assurance for Big Magnets
Our big magnets undergo a 12-step quality control process, far exceeding industry standards. From incoming raw material spectrometry analysis to final magnetic performance testing with high-precision Gauss meters, every large magnet is inspected for dimensional accuracy, coating thickness (via X-ray thickness gauge), and magnetic flux consistency. We conduct accelerated aging tests (HAST) to ensure long-term performance, with batch-to-batch magnetic fluctuation rates below 2%—well below the industry average of 5%. All our big magnets are certified to IATF 16949 (automotive) and ISO 9001 standards, and comply with REACH, RoHS, and EPA CP65 for export to Europe and North America.
IATF 16949:2016 ISO 9001:2015 REACH & RoHS Compliant SGS Salt Spray Test Passed
Packaging for Big Magnets
Given their size and weight, big magnets require specialized packaging to prevent chipping, scratching, or magnetic damage during transit. We use reinforced 8-cell inner boxes with anti-magnetic liners to separate each large magnet, then pack them in double-walled export-grade cartons with foam padding. This packaging is validated for sea and air shipping, ensuring your big magnets arrive at your facility in perfect condition, ready for assembly.
Need Custom Big Magnets for Your Industrial Project?
Whether you need standard large-sized magnets or fully customized big magnets with specific dimensions, grades, or coatings, our engineering team is ready to support your project. We offer free sample requests for small batches, technical consultation on magnetic circuit design for large-scale applications, and flexible delivery options to meet your production timeline.
Contact us via WhatsApp/WeChat/Tel: +86-18226620303 | Typical response time: < 4 business hours.
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