Description
HS Magnet’s Neodymium Disc Magnet (Grade N40) with a diameter of 50 mm and thickness of 20 mm delivers exceptional magnetic strength in a compact, precision-machined form. Crafted from high-grade NdFeB alloy and coated with a durable Ni–Cu–Ni triple layer, this disc magnet offers superior performance in demanding mechanical, electronic, and industrial environments.
Key Features
- Magnetic Grade: N40 (Nd₂Fe₁₄B)
- Remanence (Br): ≈ 1.29 T
- Maximum Energy Product (BHₘₐₓ): ≈ 40 MGOe
- Intrinsic Coercivity (Hcj): ≈ 836 kA/m
- Maximum Operating Temperature: 80 – 120 °C (depending on application)
- Curie Temperature: ≈ 310 °C
- Temperature Coefficient of Br: –0.12 %/°C
Dimensions & Tolerances
- Diameter: 50.00 mm ± 0.05 mm
- Thickness: 20.00 mm ± 0.05 mm
- Magnetization Direction: Axial (through thickness)
- Surface Finish: Precision-ground, burr-free
Coatings & Customization
- Standard Coating: Ni–Cu–Ni (nickel–copper–nickel)
- Optional Coatings: Zinc (Zn), epoxy, or gold plating for enhanced corrosion resistance
- Tightened Tolerances: ±0.02 mm available on request
- Custom Magnetization: Multi-pole or radial patterns upon inquiry
- Packaging: Bulk, foam-padded, or custom trays for automated assembly
Typical Applications
- Brushless DC motors & generators
- Magnetic couplings and clutches
- Sensors, encoders & actuators
- Magnetic bearings and levitation systems
- Loudspeakers and microphones
- Magnetic separators and lifters
- Consumer electronics and medical devices
Why Choose HS Magnet?
- 20 + years of NdFeB alloy R&D, casting & precision machining
- In-house magnetization, field mapping & 100 % quality inspection
- Flexible production: prototypes, small runs & mass production
- Rapid lead times and global shipping support
- Expert technical guidance for optimized magnetic solutions
Contact HS Magnet today to request samples, discuss custom coatings or magnetization patterns, and get a competitive quote for our 50 × 20 mm N40 neodymium disc magnets.
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