20x3mm Mini Round Heavy Duty Neodymium Magnets

20x3mm Mini Round Heavy Duty Neodymium Magnets — Overview

The 20x3mm Mini Round Heavy Duty Neodymium Magnet is a premium NdFeB disc designed to deliver exceptional holding force in a slim, low-profile format. With a 20 mm diameter and just 3 mm thickness, this magnet provides a large contact area while remaining compact and lightweight. It is perfect for applications that need strong magnetic performance without added bulk.

Key Features

• High magnetic strength from premium neodymium-iron-boron (NdFeB) material
• Slim and wide design: 20 mm diameter with 3 mm thickness for flat mounting
• Round disc shape for uniform magnetic field distribution
• Durable Ni-Cu-Ni (nickel) plating for corrosion resistance and longevity
• Axially magnetized for consistent surface attraction and alignment
• Heavy duty grade for reliable continuous use in holding and fixing tasks

Technical Specifications

• Type: Neodymium Magnet (NdFeB)
• Shape: Round / Disc
• Diameter: 20 mm
• Thickness: 3 mm
• Magnetization: Axially magnetized
• Coating: Nickel (Ni-Cu-Ni)
• Grade: Heavy Duty / High Strength
• Color: Silver
• Operating Temperature: Typically up to 80 °C

Applications

These 20x3mm neodymium magnets are versatile and widely used across many projects and industries:

• Electronics and PCB mounting or component holding
• Robotics and automation systems for sensors, mounts, and fixtures
• DIY, hobby and model making for secure, low-profile attachments
• Crafts and art projects where a strong, invisible hold is required
• Magnetic closures, holders, labels, and fixtures
• Educational demonstrations and laboratory experiments
• Flat surface mounting, alignment and positioning tasks

Advantages

• Exceptional pull force despite a slim profile
• Large surface area provides stable holding and reduced tipping
• Nickel plating improves resistance to corrosion and wear
• Easy integration into low-profile and compact designs

Installation Tips and Best Practices

• Place magnets on clean, flat metal surfaces for maximum holding force.
• When mounting to non-magnetic materials, consider using adhesive or countersinking for secure placement.
• Avoid stacking magnets without proper spacing as alignment and handling become more difficult with increased strength.
• Test the magnet strength in your specific application before final assembly.

Safety and Handling

• Handle with care; strong attraction may cause magnets to snap together and pinch skin or chip the magnets.
• Keep magnets away from children and pets and away from magnetic-sensitive devices such as credit cards, hard drives, and pacemakers.
• Avoid exposure to high temperatures, mechanical shock, drilling, or grinding which can demagnetize or damage the magnet.
• Use protective gloves and eye protection when cutting materials near magnets.

Why Choose These 20x3mm NdFeB Magnets

These magnets combine high-grade NdFeB performance with a low-profile form factor, making them ideal where space is limited but magnetic strength cannot be compromised. Their nickel plating increases durability for long-term use in industrial, hobbyist, and educational settings.

Ordering, Packaging, and Availability

• Available in single units or bulk packs depending on your project needs.
• Packaged to minimize damage during shipping, often with foam separators for stronger magnets.
• Contact our sales team for bulk pricing, custom grades, or alternative coatings.

Note: Images are for illustration purposes only. Actual product size and appearance may vary slightly.