SMON6922 3/8 x 1/2 Inch Neodymium Rare Earth Plastic Coated Cylinder Magnet N42

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 3/8 x 1/2 Inch Neodymium Plastic Coated Cylinder Magnet N42 combines high magnetic strength (42 MGOe) with durable polymer encapsulation for reliable performance in demanding industrial, automotive, and consumer applications.

Related Products: Plastic Coated Magnets

3/8 x 1/2 Inch Neodymium Rare Earth Plastic Coated Cylinder Magnet N42 Specifications

Properties

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

3/8 x 1/2 Inch Neodymium Rare Earth Plastic Coated Cylinder Magnet N42 Description

The Neodymium Rare Earth Plastic Coated Cylinder Magnet N42 is engineered from sintered neodymium-iron-boron (NdFeB), achieving a maximum energy product of 42 MGOe. The cylindrical design, measuring 9.53 mm (0.375") in diameter and 12.7 mm (0.5") in height, features a uniform polymer coating (nylon or polypropylene, 0.2–0.5 mm thick) that provides exceptional resistance to mechanical abrasion, chemicals, and humidity. This encapsulation mitigates the inherent brittleness of NdFeB magnets while enhancing electrical insulation. Axially magnetized through its height, the magnet generates a surface field ≥4,200 Gauss and a pull force≥4.5 kg against steel. Thermal performance includes a Curie temperature of 310°C, with irreversible flux loss occurring above the maximum operating temperature of 80°C. Tight dimensional tolerances (±0.05 mm) ensure consistent integration into assemblies, and the coating withstands >800 hours of salt spray testing (ASTM B117), extending service life in corrosive environments.

3/8 x 1/2 Inch Neodymium Rare Earth Plastic Coated Cylinder Magnet N42 Applications

Industrial Automation: Magnetic couplings in pumps/agitators; position sensors in CNC machinery.

Automotive: Brushless DC motor rotors; dashboard component retention; EV battery contactors.

Consumer Electronics: Vibration modules in smartphones; magnetic mounts for cameras/accessories.

Medical Devices: Encoders in surgical robots; magnetic latches for sterilizable equipment.

Renewable Energy: Blade position sensors in wind turbines; magnetic bearings in small generators.

3/8 x 1/2 Inch Neodymium Rare Earth Plastic Coated Cylinder Magnet N42 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.

3/8 x 1/2 Inch Neodymium Rare Earth Plastic Coated Cylinder Magnet N42 FAQs

Q1. Why use plastic coating instead of metal plating?

Polymer coatings (e.g., nylon) offer superior impact resistance and electrical insulation vs. nickel/gold. Ideal for high-vibration environments (e.g., motors) where chipping risk exists.

Q2. Can this magnet withstand outdoor conditions?

Yes. The plastic coating provides IP67-level moisture protection. For UV exposure, select black nylon; avoid PP in direct sunlight.

Q3. Is adhesive bonding effective on the plastic surface?

Absolutely. Abrade the coating lightly with sandpaper, then use epoxy or cyanoacrylate adhesives for permanent bonding.

Related Information

1. Common Preparation Methods

Neodymium cylinder magnets are produced via powder metallurgy. Neodymium, iron, and boron alloys are vacuum-melted at 1,300–1,400°C, cooled into ingots, and jet-milled into 3–5 μm particles. The powder is compacted in a cylindrical die under a 1.8–2.0 T aligning field, then sintered at 1,080–1,120°C in argon to achieve >99.5% density. Sintered blanks are annealed to enhance coercivity, machined to precise dimensions via diamond grinding, and cleaned. Polymer coating is applied through injection molding: magnets are placed in cavities, molten nylon/PP is injected at 200–280°C, and cooled to form a 0.2–0.5 mm uniform layer. After magnetizing axially in a 3.5 T pulsed field, each unit undergoes flux testing (Helmholtz coil) and coating integrity checks (high-voltage testing at 500–1,000 V).