Standard Neodymium Block Magnets

Everbeen Magnet manufactures and supplies high-coercivity, high-precision sintered NdFeB (Neodymium-Iron-Boron) block magnets for global electric motor, sensor, and magnetic assembly manufacturers. Backed by rigorous ISO9001 and IATF16949 certified quality management systems, our products fully comply with RoHS and REACH environmental standards.

To meet strict industrial assembly tolerances, our block magnets undergo precision surface grinding and cutting after sintering. Standard dimensional tolerances are strictly controlled between +/-0.05 mm and +/-0.10 mm, effectively preventing motor air gap asymmetry or assembly jamming caused by accumulated dimension errors. We supply full magnetic grades from N35 to N52, along with customized multi-pole magnetization and high-temperature resistance options up to 200°C, supporting both fast prototyping with sample availability and large-scale OEM production.

Magnetic Energy Product & Grade Reference

Higher grades deliver greater magnetic flux within limited installation spaces, effectively reducing equipment size and increasing motor torque density.

Precision Dimensional Tolerances
To ensure interchangeability during batch assembly, we apply rigorous geometric control on every production batch:

Length / Width / Thickness Tolerance: Standard control ranges from +/-0.05 mm to +/-0.10 mm (custom tolerances available based on customer engineering drawings).

Practical Significance: Precise dimensions ensure seamless integration when magnets are inserted into rotor slots or automated fixtures, preventing secondary machining or production downtime caused by out-of-tolerance parts.

Surface Coating Options
Because the iron content in neodymium magnets makes them highly susceptible to oxidation, we apply multi-layer electroplating tailored to different industrial environments to prevent rust and peeling:

Nickel-Copper-Nickel (Ni-Cu-Ni): Standard triple-layer plating providing excellent wear resistance and corrosion protection for standard indoor mechanical environments.

Epoxy: Offers enhanced electrical insulation, moisture resistance, and salt-spray performance, ideal for humid conditions or chemical separation equipment.

Zinc (Zn) / Gold (Au): Zinc provides a cost-effective rust-prevention alternative; gold plating satisfies premium aesthetic and anti-chemical corrosion requirements.

Operating Temperature Classifications

To prevent magnetic decay caused by thermal demagnetization inside motors and generators, we offer specialized high-temperature grades:

Standard N Grade: Maximum working temperature around 80°C

M / H Grades: Maximum working temperature from 100°C to 120°C

SH / UH / EH Grades: Maximum working temperature up to 150°C, 180°C, and 200°C respectively, suitable for high-speed servo motors and compressors.

Base Material: Sintered NdFeB (Neodymium-Iron-Boron)

Standard Shapes: Rectangular blocks, square blocks, thin plate blocks

Magnetization Directions: Through thickness, through length, through width, or customized multi-pole magnetization

Quality Inspection Items: Magnetic flux testing, surface magnetic field measurement, pull force testing, dimension and visual inspection, coating thickness testing

Compliance & Certifications: ISO9001, IATF16949, RoHS, REACH

Electric Motors and Generators: Integrated into rotors for brushless motors, servo motors, and industrial generators to increase operational efficiency.

Magnetic Separation Equipment: Applied in magnetic separators within mining, food processing, and chemical industries to efficiently trap and remove ferrous contaminants.

Industrial Automation & Fixtures: Provides stable, long-lasting holding force for welding fixtures, automated positioning systems, and proximity switches.

Precision Measuring Instruments: Utilized with magnetic reed switches for accurate positioning based on stable magnetic fields.

Standardized Production Process
From raw material batching, jet milling, magnetic field alignment pressing, high-temperature sintering, to precision surface grinding, plating treatment, and final magnetization, every step operates under a strict quality control system to ensure minimal batch-to-batch magnetic variance.

International Logistics & Secure Packaging
To comply with international air and sea freight safety regulations regarding strong magnetic fields, we implement professional export packaging standards:

Internal shielding utilizing steel/aluminum composite magnetic shielding materials.

Supplemented by moisture barriers, individual separation card slots, and reinforced export cartons and pallets to prevent magnetic flux leakage and surface damage during long-distance transit.

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