Custom corrosion resistant high performance precision Round Shaped Rare Earth Neodymium Magnet

20mm x 12mm Neodymium Disc Magnets

These Custom  industrial grade corrosion resistant high performance thermal  stability precision Round Shaped Rare Earth Neodymium Magnets are highly versatile and perfect for both DIY tasks and industrial uses. Whether organizing tools, fastening panels, or creating custom assemblies, their strong magnetic grip ensures stable, reliable performance. These Custom premium quality high adhesive force corrosion resistant  high performance precision Round Shaped Rare Earth Neodymium Magnet are frequently used in engineering, aerospace, and construction for precise alignment and firm-holding power. Ideal for both casual and professional users, these magnets provide a versatile solution for a wide range of applications.

Magnet Grade: N42

N42 grade neodymium magnets offer a balanced combination of strength and versatility, with a maximum energy product of around 40-43 MGOe. Well-suited for various applications, including motors, sensors, and precision assemblies, they deliver consistent magnetic performance. Their reliable field strength makes them a preferred choice for consumer electronics and technical equipment alike. Widely adopted across industries, N45SH magnets are valued for their dependable and efficient performance.

APPLICATION EXAMPLES 

Material Neodymium (NdFeB)

Product Name: Custom corrosion resistant high performance precision Round Shaped Rare Earth Neodymium Magnet

Magnetic Grade: N42   (Br ≥ 13.3 kGs, Hcj ≥ 20 kOe)

Dimensions: D20mm x 1mm (customizable)

Dimensional Tolerance: Length ±0.03mm, Width ±0.03mm, Thickness ±0.03mm

Operating Temperature: ≤90°C (high-temp version available)

Density: ≥7.5 g/cm³

Surface Magnetic Field: 3800 ±200 Gauss (measured with TM-801 Gauss meter)

Magnetic Flux: 2.3 mWb (measured with fluxmeter)

Manufacturing Process

This Custom high strength energy efficient corrosion resistant high performance precision Round Shaped Rare Earth Neodymium Magnet is manufactured through the following key processes:

● A high-speed grinding wheel shapes the magnet's surfaces with tight dimensional tolerances.

● Coolant fluid is applied to control heat, reduce surface stress, and ensure a smooth finish.

● The result is a uniform, precisely dimensioned magnet with clean edges—ideal for high-performance applications.

This precision step is essential for ensuring that the final magnets meet strict quality standards for use in motors, sensors, electronics, and aerospace components      

Surface Treatment & Plating

To enhance this tailor- made high torque output premium quality strong magnetic force high performance permanent Round Shaped Rare Earth Neodymium Magnet’s  corrosion resistance and appearance:

Default Plating: Triple-layer Ni-Cu-Ni (customizable).

Standard Thickness: Ni (3μm) + Cu (5μm) + Ni (4μm).

Optional Plating: Single-layer Zn (5μm) for cost-sensitive projects.

Appearance & Dimensional Inspection

Visual Inspection: Under standardized lighting, trained QC staff check for cracks, chipping, inclusions, pores, or oxidation

Image Measurement System: High-res cameras and algorithms conduct non-contact 2D measurements, especially for complex or irregular shapes, ensuring efficiency and objectivity in mass production.

Reliability Testing

Impact & Vibration Test: Simulates shipping and usage conditions to ensure operational stability.

Constant Temperature & Humidity Test: Performed under 85°C and 85% RH for 96–500 hours. Performance and appearance are compared before and after testing.

Applications

Electric Motors & Generators
Application: Precision-engineered magnets are employed in stators, rotors, and brushless DC motors to enhance magnetic flux density, efficiency, and torque performance.

Consumer Electronics
Application: High-performance neodymium magnets are integrated into speakers, haptic systems, vibration motors, and sensors, contributing to compact design and reliable functionality.

Packaging & Transportation

Defect Elimination: 100% inspection using calipers, projectors, visual checks, and automated systems to reject cracked, chipped, oxidized, or coated defective magnets.

Uniform Magnetization & Structured Arrangement: Magnets are uniformly magnetized and arranged for optimal packaging based on customer requirements to ensure performance and facilitate automated assembly.

Vacuum Sealed Packaging: Multi-layer vacuum sealing with moisture barriers, desiccants or nitrogen, prevents corrosion and magnetic interference during storage and shipping.

Customized Outer Packaging: Shock-proof, moisture-resistant, and anti-magnetic leakage packaging (e.g., multilayer cartons, plastic boxes, metal shielding) ensures compliance with international logistics standards. Each box includes a product list, labels, and tracking codes.

With deep expertise in magnetic materials, we deliver solutions for industries like EVs, smart manufacturing, and electronics. Our strong technical capabilities and product consistency have earned the trust of customers worldwide.

Usage Precautions？

● Handle gently: Avoid impacts/drops (brittle material).

● Prevent pinching: Slide magnets apart—do not pry.

● Polarity check: Install correctly to avoid malfunctions.

● Avoid moisture/acids: Store in dry, mild environments.

● Keep away from sensitive devices: Hard drives, IC cards, pacemakers, etc.

Customization & Services

● Custom magnet size, shape, and coating (layers, thickness, color)

● Tailored magnetization direction and field strength

● Laser engraving service for logos or serial numbers

● Packaging and suction force testing for special applications

Please contact us for free samples, magnet customization solutions, and MSDS RoHS, ISO 9001, QC080000, IATF 16949, ISO 14001, ISO 27001, or other relevant certificates!

We’re here to help!

 Phone/WhatsApp/WeChat: +86 180 3822 5893

Email: sales@jinconn.com

Website: www.jinconnmagnet.com

 Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong, China