Round Neodymium Magnet 20x5mm

The 20 x 5mm N42H Neodymium Disc Magnet is a powerful rare earth permanent magnet designed for applications requiring strong magnetic holding force in a compact size. Manufactured from high-performance Neodymium Iron Boron (NdFeB), this round magnet offers excellent magnetic strength, durability and resistance to demagnetisation.

With a 20mm diameter, 5mm thickness and a rated pulling force of 7.43kg, this magnet is ideal for industrial applications, electronics, magnetic fixtures, DIY projects, crafts and general holding or mounting applications.

The magnet features a triple-layer Nickel-Copper-Nickel (Ni-Cu-Ni) coating, providing a smooth silver finish and protection against corrosion under normal indoor conditions. Its N42H grade allows for a maximum operating temperature of up to 120°C, making it suitable for applications where higher temperature resistance is required.

Key Features

• Strong Magnetic Force: Rated pulling force of 7.43kg under ideal testing conditions.

• Compact Disc Shape: 20mm diameter x 5mm thickness for easy integration into various projects.

• N42H Grade Neodymium: High-strength rare earth magnet with excellent magnetic performance.

• High Temperature Resistance: Maximum operating temperature of 120°C.

• Nickel-Plated Finish: Triple-layer Ni-Cu-Ni coating for improved corrosion resistance.

• Permanent Magnet: Retains its magnetic properties without requiring an external power source.

• Axial Magnetisation: Magnetic poles are located on the two flat circular faces.

• Versatile Applications: Suitable for electronics, industrial equipment, magnetic closures, DIY projects and more.

Product Specifications

• Magnet Type: Neodymium Rare Earth Magnet (NdFeB)

• Grade: N42H

• Shape: Round / Disc

• Diameter: 20mm

• Thickness: 5mm

• Dimensions: 20 x 5mm

• Pulling Force: 7.43kg (rated)

• Coating: Nickel-Copper-Nickel (Ni-Cu-Ni)

• Colour: Silver

• Magnetisation Direction: Axial (through the thickness)

• Maximum Operating Temperature: 120°C

• Dimensional Tolerance: ±0.1mm

• Quantity: 1 Piece

Applications

The 20 x 5mm neodymium disc magnet is suitable for a wide range of commercial, industrial and personal projects, including:

• Electronics: Magnetic sensors, reed switches, actuators and electronic assemblies.

• Magnetic Closures: Cabinet doors, access panels, display cases and removable covers.

• Industrial Equipment: Magnetic fixtures, positioning systems and holding mechanisms.

• DIY and Hobby Projects: Custom magnetic mounts, model making, 3D printing projects and prototypes.

• Workshop Applications: Tool holders, magnetic organisers and temporary fixtures.

• Arts and Crafts: Magnetic displays, signage, decorative projects and packaging closures.

• Automation Projects: Magnetic triggering and positioning applications.

Important Handling and Safety Information

• Neodymium magnets are extremely strong and should be handled carefully to prevent pinching injuries.

• The magnet is brittle and may crack, chip or shatter if dropped or allowed to collide with another magnet or metal surface.

• Do not drill, cut, grind or machine neodymium magnets.

• Avoid prolonged exposure to moisture or corrosive environments, particularly if the nickel coating becomes damaged.

• Keep away from small children, as swallowed magnets can cause serious internal injuries.

• Keep magnets away from pacemakers, sensitive electronic devices and equipment that may be affected by strong magnetic fields.

• Although N42H magnets are rated for operation up to 120°C, excessive temperatures can cause permanent loss of magnetic strength.

Please Note: The rated 7.43kg pulling force represents an ideal direct-pull measurement against a suitable thick, flat steel surface. Actual holding strength will vary depending on the mounting surface, air gap, material thickness, pulling direction and operating conditions. Sliding or shear holding force is generally lower than direct pulling force.

Package Includes: 1 x Round Neodymium Disc Magnet 20 x 5mm – N42H.