Neodymium Disc Magnet – 25mm x 5mm

The Neodymium Disc Magnet – 25mm x 5mm is a low-profile rare earth permanent magnet measuring 25mm in diameter x 5mm thick. Manufactured from Neodymium Iron Boron (NdFeB), this round magnet provides high magnetic performance relative to its physical size and is suitable for industrial equipment, engineering, manufacturing, magnetic holding, product assemblies, fixtures, closures, displays, furniture, prototyping and custom OEM applications.

Its 25mm circular face and slim 5mm profile make this neodymium magnet particularly useful where a relatively broad magnetic surface is required within a shallow installation space. It can be integrated into circular recesses, housings, fixtures and manufactured products or used with compatible ferromagnetic steel in appropriately designed magnetic holding systems.

Also known as a 25mm neodymium disc magnet, rare earth disc magnet, NdFeB disc magnet, round neodymium magnet or permanent disc magnet, this magnetic component operates continuously without electricity, batteries or charging.

Key Features

• Diameter: 25mm
• Thickness: 5mm
• Material: Neodymium Iron Boron (NdFeB)
• Rare earth permanent magnet
• Broad 25mm circular face
• Slim 5mm profile
• High magnetic performance relative to size
• Suitable for shallow recesses and housings
• Suitable for magnetic holding and positioning
• Useful for magnetic closures and catches
• Suitable for fixtures and product assemblies
• Permanent magnetic operation
• No electricity, batteries or charging required
• Suitable for industrial, prototype and OEM applications

Common Applications

• Industrial equipment
• Engineering
• Manufacturing
• Magnetic holding and positioning
• Product assemblies
• Fixtures and jigs
• Magnetic closures and catches
• Furniture and cabinetry
• Removable panels
• Displays and signage
• Machinery
• Sensors and instrumentation
• Retail displays
• Packaging
• Research and development
• Prototypes
• Custom magnetic assemblies
• OEM products

25mm Diameter x 5mm Thick Neodymium Magnet

This neodymium magnet measures 25mm in diameter x 5mm thick, creating a broad, low-profile disc suitable for applications where installation depth is limited.

Its dimensions can make it useful for:

• Shallow circular recesses
• Product housings
• Furniture components
• Display systems
• Removable panels
• Fixtures
• Jigs
• Equipment assemblies
• Prototype products

Where installed into a recess or housing, provide appropriate dimensional clearance and avoid force-fitting the brittle neodymium material.

Neodymium Iron Boron Rare Earth Magnet

Neodymium Iron Boron (NdFeB) is a high-performance rare earth permanent magnetic material widely used where substantial magnetic performance is required from compact dimensions.

Neodymium magnets are commonly incorporated into:

• Industrial machinery
• Engineering equipment
• Manufactured products
• Magnetic closures
• Fixtures
• Sensors
• Displays
• Custom magnetic systems

The specific neodymium grade has not been supplied for this product and should not be assumed.

Low-Profile Magnetic Applications

With a thickness of only 5mm, this disc magnet is suitable for applications where available installation depth is restricted.

Potential uses include:

• Slim product housings
• Shallow recesses
• Furniture
• Cabinetry
• Displays
• Signage
• Access panels
• Equipment covers
• Custom fabricated components

The broad 25mm diameter provides a comparatively large circular face while maintaining a compact overall profile.

Magnetic Holding and Positioning

This 25mm x 5mm neodymium magnet can be incorporated into appropriately designed magnetic holding and positioning systems.

Potential applications include:

• Component positioning
• Removable equipment
• Assembly fixtures
• Inspection jigs
• Positioning guides
• Display components
• Production equipment
• Prototype systems

Depending on the design, the magnet may attract suitable ferromagnetic steel or another appropriately oriented permanent magnet.

Where vibration, impact or dynamic movement is present, magnetic holding should be evaluated under actual operating conditions.

Magnetic Closures and Catches

The low-profile format can also be useful for magnetic closure and retention systems.

Potential applications include:

• Cabinets
• Furniture
• Boxes
• Product enclosures
• Access panels
• Display components
• Packaging
• Removable covers

The magnet may be paired with a suitable ferromagnetic steel strike plate or another correctly oriented permanent magnet.

For magnet-to-magnet closures, confirm polarity before permanent installation.

Fixtures and Jigs

Neodymium disc magnets can provide convenient magnetic positioning within suitably designed fixtures and jigs.

Potential applications include:

• Assembly fixtures
• Inspection equipment
• Positioning guides
• Removable stops
• Prototype tooling
• Production equipment

Where unexpected magnetic release could cause injury, falling equipment or damage, appropriate mechanical retention should be incorporated into the design.

Sensors and Instrumentation

This compact disc magnet may also be incorporated into appropriately designed magnetic sensing applications.

Potential uses include:

• Position sensors
• Proximity detection
• Reed switches
• Magnetic switches
• Instrumentation
• Automation equipment
• Prototype electronics

The magnetisation direction and pole orientation have not been supplied. These specifications should be confirmed where magnetic field direction is important.

Magnetisation Direction

Disc magnets can be manufactured with different magnetisation configurations.

The magnetisation direction for this product has not been supplied.

Do not automatically assume that the two 25mm circular faces correspond to the north and south poles without verification.

For sensor systems, magnet-to-magnet assemblies or engineered magnetic circuits, confirm polarity and magnetisation before installation.

Magnetic Performance

Actual magnetic performance depends on factors including:

• Neodymium grade
• Magnetisation direction
• Magnet geometry
• Magnetic circuit design
• Target steel composition
• Target steel thickness
• Available contact area
• Surface flatness
• Air gaps
• Paint and coatings
• Rust and contamination
• Load direction
• Mechanical leverage

No specific pull force or magnetic flux density in Gauss has been supplied for this magnet and these values should not be inferred from its dimensions.

Direct Pull vs Shear Force

Magnetic holding performance varies according to load direction.

Direct pull occurs when the magnet is pulled perpendicular to a target steel surface.

Shear force occurs when the applied load acts parallel to the surface and encourages the magnet to slide.

Practical holding on vertical steel can therefore be considerably lower than ideal direct-pull performance.

Surface friction, leverage, vibration and movement can further influence practical holding.

Air Gaps and Surface Contact

Neodymium magnets generally provide their best performance when positioned close to compatible ferromagnetic material.

Magnetic attraction can be reduced by gaps created by:

• Paint
• Powder coating
• Adhesive
• Protective films
• Plastic
• Dirt
• Rust
• Uneven surfaces
• Mechanical clearance

For improved magnetic performance, minimise unnecessary separation between the magnet and target steel wherever practical.

Bonding Neodymium Disc Magnets

This magnet may be bonded into a suitable circular recess or onto an appropriate substrate.

Before bonding:

• Confirm magnetic polarity and orientation
• Ensure surfaces are clean and dry
• Remove oil, grease and contamination
• Select an adhesive compatible with both materials
• Provide suitable dimensional clearance
• Avoid force-fitting
• Allow the adhesive to cure according to its instructions

The specific coating or plating has not been supplied, so adhesive compatibility should be verified for the actual surface finish.

Avoid applying bending or leverage to the magnet during installation.

Compatible Target Materials

Neodymium magnets attract suitable ferromagnetic materials, including:

• Mild steel
• Iron
• Magnetic steel
• Compatible ferromagnetic components

They do not effectively attract non-magnetic materials such as:

• Aluminium
• Copper
• Brass
• Plastic
• Timber
• Glass

Many stainless steel grades may be weakly magnetic or non-magnetic and should be tested before relying on magnetic attraction.

Neodymium vs Ferrite Disc Magnets

Neodymium and ferrite are both widely used permanent magnetic materials.

Neodymium magnets generally provide:

• Higher magnetic performance relative to size
• Strong magnetic properties from compact dimensions
• Advantages where available installation space is restricted
• Broad use in industrial, engineering and precision applications

Ferrite magnets are generally:

• More economical
• Naturally corrosion resistant
• Suitable for many general-purpose applications
• Useful where larger physical dimensions are acceptable

Neodymium is often preferred where compact dimensions and high magnetic performance relative to magnet volume are priorities.

Permanent Magnetic Operation

This neodymium disc magnet is a permanent magnet.

It requires:

• No electricity
• No batteries
• No charging
• No external power supply

Its magnetic field remains continuously active during normal use.

Technical Specifications

• Product Type: Neodymium Disc Magnet
• Alternative Names: Rare Earth Disc Magnet, NdFeB Disc Magnet, Round Neodymium Magnet, Permanent Disc Magnet
• Diameter: 25mm
• Thickness: 5mm
• Shape: Disc / Cylinder
• Profile: Low Profile
• Magnetic Material: Neodymium Iron Boron (NdFeB)
• Magnet Type: Rare Earth Permanent Magnet
• Magnetic Operation: Permanent
• Power Required: None
• Target Materials: Compatible ferromagnetic iron and steel
• Primary Functions: Magnetic holding, positioning, closure, sensing and attraction
• Typical Applications: Industrial equipment, engineering, manufacturing, fixtures, product assemblies, closures, furniture, displays, prototypes and OEM products

Handling Neodymium Disc Magnets

Neodymium magnets are hard and brittle despite their high magnetic performance.

The relatively slim 5mm profile should be protected from bending, leverage and uncontrolled impacts.

Avoid:

• Allowing magnets to snap together
• Allowing the magnet to strike steel objects
• Dropping it onto hard surfaces
• Flexing or bending the magnet
• Force-fitting it into an undersized recess
• Drilling
• Cutting
• Machining

Neodymium magnets can chip, crack or break during uncontrolled collisions, and damaged fragments may have sharp edges.

Safety Information

Neodymium magnets can move suddenly toward steel surfaces or other magnets, creating pinch and collision hazards. Keep fingers clear when bringing the magnet close to ferromagnetic objects.

Keep this magnet securely away from babies and children. Swallowed magnets can cause severe or life-threatening internal injuries, particularly if multiple magnets or a magnet and another metal object are swallowed. Seek urgent medical attention if magnet ingestion is suspected.

Keep neodymium magnets an appropriate distance from:

• Pacemakers
• Implanted medical devices
• Magnetic storage media
• Magnetic cards
• Sensitive electronic equipment

Where unexpected magnetic release could cause injury or equipment damage, use appropriate secondary mechanical retention rather than relying solely on magnetic attraction.

Please Note

This product is a Neodymium Disc Magnet measuring 25mm in diameter x 5mm thick, manufactured from Neodymium Iron Boron (NdFeB) rare earth magnetic material.

No specific neodymium grade, pull force, Gauss rating, coating or plating, magnetisation direction, pole orientation, dimensional tolerance or maximum operating temperature has been supplied and these specifications should not be assumed.

Actual magnetic performance depends on magnetic grade, magnetisation, target steel composition and thickness, available contact area, air gaps, surface condition, magnetic circuit, load direction and operating conditions.

The stated 25mm x 5mm dimensions describe the physical size of the magnet and do not represent its pull force, lifting capacity or safe working load.

This magnet is not certified lifting equipment and should not be used for overhead or safety-critical lifting.