SMON6923 1/2 x 1/2 x 1/8 Inch Neodymium Rare Earth Gold Plated Block Magnet N52

Brand Description

Stanford Magnets, a company specializing in the research and production of advanced materials, guarantees that each of its products reaches international leading standards through meticulous craftsmanship and strict quality control. The 1/2 x 1/2 x 1/8 Inch Neodymium Gold Plated Block Magnet N52 delivers exceptional magnetic strength (52 MGOe) and superior corrosion resistance for high-reliability applications in electronics, industrial systems, and medical devices.

Related Products: Plastic Coated Magnets

1/2 x 1/2 x 1/8 Inch Neodymium Rare Earth Gold Plated Block Magnet N52 Specifications

Properties

*The above product information is based on theoretical data. For specific requirements and detailed inquiries, please contact us.

1/2 x 1/2 x 1/8 Inch Neodymium Rare Earth Gold Plated Block Magnet N52 Description

The Neodymium Rare Earth Gold Plated Block Magnet N52 is engineered from sintered neodymium-iron-boron (NdFeB) alloy, achieving a maximum energy product of 52 MGOe, the highest commercially available grade. Measuring 12.7 mm (0.5") in length, 12.7 mm (0.5") in width, and 3.18 mm (0.125") in thickness, it features a triple-layer gold-nickel-copper plating that provides exceptional resistance to humidity, chemicals, and oxidation, exceeding 500 hours in neutral salt spray tests (ASTM B117). Axially magnetized through its 3.18 mm thickness, the magnet generates a surface field ≥5,100 Gauss and a pull force ≥6.5 kg against steel. Thermal stability is characterized by a Curie temperature of 310°C, with irreversible flux loss occurring above the maximum operating temperature of 80°C. The gold coating enhances electrical conductivity and minimizes eddy current losses in dynamic applications, while tight dimensional tolerances (±0.05 mm) ensure consistent integration into precision assemblies. Due to the inherent brittleness of sintered NdFeB, protective handling is recommended to prevent chipping.

1/2 x 1/2 x 1/8 Inch Neodymium Rare Earth Gold Plated Block Magnet N52 Applications

Electronics: Miniature speakers, vibration motors, and magnetic sensors in smartphones, wearables, and IoT devices.

Industrial: Magnetic couplings, encoders, and holding fixtures in automation equipment and CNC machinery.

Automotive: Brushless DC motor components, dashboard sensor retention, and EV battery contactors.

Medical Devices: Surgical tool assemblies, MRI accessories, and sterilizable equipment latches.

Consumer Goods: Magnetic closures for luxury accessories, tool holders, and DIY projects requiring high strength-to-size ratios.

1/2 x 1/2 x 1/8 Inch Neodymium Rare Earth Gold Plated Block Magnet N52 Packaging

To ensure safety during transportation and compliance with shipping regulations, all magnets are securely packed with a metal shielding layer inside the box. This prevents magnetic interference with surrounding items and protects the product from external damage.

Packaging: Carton, Wooden Box, or Customized.

1/2 x 1/2 x 1/8 Inch Neodymium Rare Earth Gold Plated Block Magnet N52 FAQs

Q1. Why choose gold plating over nickel/epoxy?

Gold offers superior corrosion resistance in harsh environments (e.g., saltwater, acids), enhances electrical conductivity, and prevents oxidation for long-term reliability in electronics.

Q2. What happens if used above 80°C?

Temperatures >80°C cause irreversible demagnetization (≥15% flux loss at 100°C). For high-temp applications, consider grades like N52H (120°C) or N52SH (150°C).

Q3. Can this magnet be cut or drilled?

No-sintered NdFeB is brittle and may shatter. Custom sizes must be specified during manufacturing. Diamond grinding is feasible, but it risks micro-cracks.

Related Information

1. Common Preparation Methods

Neodymium block magnets are manufactured via powder metallurgy. Neodymium, iron, and boron raw materials are vacuum-melted at >1,300°C, cooled into ingots, and jet-milled into 3–5 μm particles. The powder is compacted in a rectangular die under a 1.8–2.0 T magnetic field to align crystal orientations, then sintered at 1,080–1,100°C in argon to achieve >99.5% density. Sintered blocks undergo annealing to optimize coercivity, followed by precision machining with diamond-grinding tools to attain ±0.05 mm dimensional accuracy. A triple-layer Ni-Cu-Au coating is applied: first, nickel-copper undercoating via electroplating for adhesion and barrier protection; then, a gold top layer deposited by immersion plating for corrosion resistance. Finally, magnets are axially magnetized in a pulsed field >3.5 T and tested for flux uniformity (Helmholtz coil) and coating integrity (high-voltage testing at 500–1,000 V).