What is Neodymium Block Magnets?
Neodymium block magnets are a classic rectangular prism-shaped rare earth permanent magnet, renowned for their uniform block structure that enables easy integration into magnetic circuits, industrial assemblies and custom designs. This versatile shape offers consistent magnetic distribution across its flat surfaces and precise dimensional adaptability, making it one of the most widely used NdFeB magnet forms for both industrial automation and DIY projects. Crafted from high-purity neodymium-iron-boron (NdFeB) alloys, these block magnets deliver exceptional magnetic strength in a compact, rigid form, with customizable sizes to match diverse application requirements.
Our neodymium block magnets are available with a premium aluminum coating that provides superior protection against corrosion, wear and scratch damage, significantly enhancing environmental resistance and extending service life—even in harsh working conditions. We also offer the high-performance N52 grade for maximum magnetic output: the top standard grade of neodymium magnets, boasting an unrivaled magnetic energy product and pulling force. This combination of the practical block shape, protective aluminum coating and high-strength N52 grade creates a durable, high-performance magnetic solution ideal for compact designs demanding strong, stable magnetism.
Key Features of Neodymium Block Magnets
Top-Tier Magnetic Performance: N52 grade offers maximum magnetic energy product, unbeatable pulling force for compact designs
Aluminum Coating Protection: Superior corrosion, wear and scratch resistance, extends service life in harsh environments
Precision Engineering: Tight dimensional tolerance, consistent magnetic output, 100% flux measured and inspected
Customizable Options: Multiple grades (N35-N52, M/H/SH/UH/EH), coatings and magnetization directions available
Excellent Mechanical Properties: Rigid structure, suitable for integration into motors, generators and magnetic assemblies
Versatile Sizing: Standard and custom block dimensions to match all industrial and DIY application needs
Available Grades & Coatings
Magnet Grades (Tailored to Temperature & Performance)
Standard (N): N35-N52, max 80°C | Medium (M): N35M-N50M, max 100°C
High (H): N35H-N48H, max 120°C | Super High (SH): N35SH-N45SH, max 150°C
Ultra High (UH): N28UH-N42UH, max 180°C | Extreme High (EH): N28EH-N40EH, max 200°C
Surface Coatings (Enhanced Protection)
Primary: Aluminum coating, Ni-Cu-Ni, Black Nickel, Zn, Sn
Premium: Au, Ag, Black Epoxy, Phosphated, White/Black Satin Ni
Alloy Coatings: Ni+Cu, Ni+Sn, Ni+Cr, Ni+Ag (for specialized industrial use)
Magnetization Directions
Our neodymium block magnets support multiple magnetization directions for flexible magnetic circuit design:
Axially-Magnetized (most common for blocks)
Diametrically-Magnetized
Axially-Multipole-Magnetized
Custom magnetization directions (per design requirements)
Production Process
Every neodymium block magnet is manufactured through a strict, professional 10-step process for uncompromising quality:
1. Weighing (precision raw material proportioning) → 2. Melting (vacuum induction furnace) → 3. Primary Pulverization → 4. Fine Pulverization → 5. Pressing (magnetic field orientation) → 6. Sintering & Tempering → 7. Machining → 8. Surface Treatment (aluminum coating) → 9. Magnetization → 10. Packaging & Shipping
Wide Range of Applications
Leveraging high magnetic strength and aluminum coating protection, these neodymium block magnets are widely used in:
Industrial Automation: Motors, generators, magnetic assemblies, robotics, conveyors
Electronics: Sensors, speakers, hard disk drives, consumer electronic devices
Medical Equipment: MRI scanners, prosthetics, diagnostic and surgical equipment
Renewable Energy: Wind turbine generators, solar panel components
Automotive: EV powertrain parts, automotive sensors, magnetic couplings
DIY & Hobby Projects: Crafting, magnetic holding, tool organization, prototyping
Customization Service
We offer flexible customization for N52 aluminum coated neodymium block magnets to meet your specific requirements:
Custom block dimensions (length, width, height) with tight tolerance
Grade selection based on working temperature and magnetic performance needs
Custom coating and magnetization direction
Small and bulk order support (MOQ 1 piece)
One-stop technical support and magnetic circuit design advice
Our Manufacturing Advantages
19+ Years of Expertise: National hi-tech enterprise, one-stop magnetic solution provider
Full-Chain Production: In-house manufacturing from raw materials to finished magnetic assemblies
Strict Quality Control: 100% flux measurement, dimensional inspection and B-H curve testing
Large-Scale Capacity: 3000 tons of NdFeB production annually, ready for bulk and custom orders
Professional R&D Team: 30 engineers, co-research with Chinese Academy of Science
Traceable Production: MES system integration, full traceability of raw materials and production processes
Quality Assurance
All our neodymium block magnets undergo rigorous classification inspection and outgoing quality testing, including dimensional accuracy, appearance check, magnetic flux measurement and performance verification. We provide a detailed inspection report for every order, ensuring zero-defect quality and consistent magnetic performance for all applications.
