Custom Size Neodymium Block Magnets
Precision-engineered NdFeB block magnets tailored for industrial automation, electric motors, sensors, and magnetic assemblies where standard off-the-shelf sizes cannot meet specific dimensional, spatial, or magnetic flux requirements. Backed by rigorous quality control and deep manufacturing expertise, we deliver reliable magnetic solutions built to precise OEM specifications.
Custom Size Neodymium Block Magnets | Industrial Manufacturing & Wholesale
Precision-engineered NdFeB block magnets tailored for industrial automation, electric motors, sensors, and magnetic assemblies where standard off-the-shelf sizes cannot meet specific dimensional, spatial, or magnetic flux requirements. Backed by rigorous quality control and deep manufacturing expertise, we deliver reliable magnetic solutions built to precise OEM specifications.
Technical Specifications
|
Parameter |
Specification Range |
|
Material |
Sintered Neodymium-Iron-Boron (NdFeB) |
|
Geometry |
Rectangular and square blocks (custom profiles, steps, and grooves available) |
|
Magnetic Grades |
N35 to N52, M, H, SH, UH, EH |
|
Max. Energy Product |
Up to 52 MGOe |
|
Standard Tolerances |
+/-0.05 mm to +/-0.1 mm (higher precision available upon request) |
|
Magnetization Directions |
Through thickness, length, width, or multi-pole configurations |
|
Surface Treatments |
Ni-Cu-Ni, Epoxy, Zinc, Gold, Passivation |
|
Max. Operating Temp. |
80°C up to 200°C (grade-dependent) |
|
Quality Inspection |
Br, Hcb, Hcj, BHmax testing; 100% dimensional and visual sorting |
Customization Parameters
Dimensional and Tolerance Engineering
Standard rectangular blocks often fail to fit restricted installation envelopes. We machine custom lengths, widths, and thicknesses directly from technical drawings or CAD files to eliminate secondary mechanical brackets in your assembly.
Aspect Ratios: Supports ultra-thin profiles, elongated bars, and large-scale industrial blocks.
Complex Features: Integration of mounting holes, countersinks, steps, or alignment grooves during the shaping phase to reduce post-processing breakage risks.
Material Grades & Energy Density
Neodymium magnets provide superior magnetic energy density compared to ferrite or Alnico alternatives, allowing engineers to shrink magnet volume while maintaining required holding force or air-gap flux density.
Standard Industrial (N35-N42): Cost-effective options for general magnetic separation, holding fixtures, and consumer electronics.
High-Energy Compact (N45-N52): Utilized in high-performance servo motors and miniature sensors where space is strictly constrained.
Magnetization Orientation
Proper magnetic alignment directs flux precisely where required, preventing circuit inefficiencies:
Through Thickness: Poles on the two largest parallel faces. Ideal for flat holding surfaces and magnetic clamps.
Through Length / Width: Poles aligned across axial dimensions. Essential for linear actuators, reed switches, and rotor assemblies.
Environmental Coatings
Raw sintered NdFeB is prone to oxidation due to its iron content. We match the protective layer to the operating environment to prevent structural degradation:
Ni-Cu-Ni (Nickel-Copper-Nickel): Standard multi-layer metallic plating for indoor industrial machinery and general electronics.
Epoxy: Enhanced moisture and salt-spray barrier, recommended for humid environments or direct exposure to damp conditions.
Zinc: Economical baseline protection for dry, short-term mechanical environments.
Temperature Stability Grades
Standard neodymium magnets lose remanence rapidly above 80°C. For thermal-intensive applications like electric vehicle motors or industrial heating elements, we supply high-coercivity grades:
M Series: Rated up to 100°C
H Series: Rated up to 120°C
SH / UH / EH Series: Rated from 150°C up to 200°C
Primary Industrial Applications
Electric Motors & Generators: Used in BLDC motors and industrial servo drives to maximize torque density and reduce overall rotor weight.
Automation & Sensor Systems: Integrated into magnetic encoders and proximity switches for reliable, repeatable position detection.
Magnetic Separation & Holding: Heavy-duty block assemblies utilized in industrial clamping, recycling sorting drums, and material handling fixtures.
Medical Devices: High-coercivity blocks deployed in diagnostic instrumentation and laboratory magnetic separation equipment.
Manufacturing & Quality Control
To maintain batch-to-batch consistency for OEM production lines, our manufacturing workflow is strictly monitored:
Raw Material Control: Sourcing high-purity rare-earth elements to ensure stable intrinsic coercivity (Hcj).
Powder Metallurgy: Vacuum induction melting, hydrogen decrepitation, jet milling, and magnetic field alignment pressing to optimize crystal orientation.
Precision Machining: Wire EDM and diamond-wheel grinding executed under coolant to prevent micro-cracking in brittle sintered material.
Testing Protocols: Hysteresis graph testing verifies magnetic parameters (Br, Hc, BHmax) before packaging.
Why Global OEM Partners Choose Us
Direct Factory Pricing: Eliminates middlemen, offering competitive wholesale pricing for volume production.
Engineering Support: Professional magnetic circuit design and simulation assistance for custom development.
Strict Confidentiality: Complete NDA compliance for proprietary client designs and technical drawings.
Global Logistics: Secure export packaging compliant with air and ocean shipping safety regulations for hazardous/magnetic materials.
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