Neodymium Disc Magnet – 30mm x 5mm

The Neodymium Disc Magnet – 30mm x 5mm is a low-profile rare earth permanent magnet measuring 30mm 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, product assemblies, magnetic closures, fixtures, displays, furniture, prototyping and custom OEM applications.

Its broad 30mm circular face and slim 5mm profile make this neodymium magnet particularly useful where a relatively large magnetic face is required without excessive installation depth. It can be integrated into circular recesses, housings and manufactured components or used with compatible ferromagnetic steel in appropriately designed holding and positioning systems.

Also known as a 30mm neodymium disc magnet, rare earth disc magnet, NdFeB disc magnet, round neodymium magnet or permanent disc magnet, this magnetic component provides continuous permanent magnetic attraction without electricity, batteries or charging.

Key Features

• Diameter: 30mm
• Thickness: 5mm
• Material: Neodymium Iron Boron (NdFeB)
• Rare earth permanent magnet
• Broad 30mm 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 custom 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
• Prototypes
• Research and development
• Custom magnetic assemblies
• OEM products

30mm Diameter x 5mm Thick Neodymium Magnet

This neodymium magnet measures 30mm in diameter x 5mm thick, creating a broad, low-profile disc suitable for applications where installation depth is limited.

Potential installations include:

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

Where the magnet is installed into a recess, provide suitable 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 selected for:

• Industrial equipment
• Engineering systems
• Product manufacturing
• Magnetic closures
• Sensors
• Fixtures
• Displays
• Custom magnetic assemblies

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

Low-Profile Magnetic Applications

At only 5mm thick, this disc magnet can be useful where a shallow magnetic component is required.

Potential applications include:

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

The broad 30mm diameter provides a comparatively large circular face while maintaining a low overall profile.

Magnetic Holding and Positioning

This neodymium disc magnet can be incorporated into appropriately designed magnetic holding and positioning systems.

Potential uses include:

• Removable components
• Positioning fixtures
• Equipment panels
• Inspection jigs
• Product assemblies
• Display components
• Prototype systems

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

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

Magnetic Closures and Catches

The broad, slim format can also be useful for magnetic closure systems where installation depth is restricted.

Potential applications include:

• Cabinets
• Furniture
• Boxes
• Access panels
• Display components
• Product enclosures
• Custom closures

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

For magnet-to-magnet applications, 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
• Positioning guides
• Inspection equipment
• Removable stops
• Prototype tooling
• Production equipment

Where unexpected release could cause injury or equipment damage, use appropriate mechanical retention in addition to magnetic attraction.

Magnetisation Direction

Disc magnets can be manufactured with different magnetisation configurations.

The magnetisation direction and pole orientation for this product have not been supplied.

Do not automatically assume that the two 30mm circular faces correspond to the north and south poles without verification.

Where polarity or field direction is important, such as in sensors, magnet-to-magnet assemblies or engineered magnetic circuits, confirm the magnetisation specification before installation.

Magnetic Performance

Actual magnetic performance depends on factors including:

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

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

Direct Pull vs Shear Force

Magnetic holding varies according to the direction in which the load is applied.

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

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

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

Surface friction, leverage, vibration and movement can further affect holding.

Air Gaps and Surface Contact

Neodymium magnets generally provide their best magnetic performance when positioned close to suitable 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 30mm x 5mm magnet may be bonded into a suitable 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 surfaces
• 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 flexing or bending the magnet during installation. Despite their magnetic strength, neodymium magnets are mechanically brittle.

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 are 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 installation depth or available space is limited
• Broad use in engineering, manufacturing and precision assemblies

Ferrite magnets are generally:

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

A low-profile neodymium disc such as this 30mm x 5mm magnet can be particularly useful where compact installation dimensions are a priority.

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: 30mm
• 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 and attraction
• Typical Applications: Industrial equipment, engineering, manufacturing, product assemblies, fixtures, closures, furniture, displays, prototypes and OEM products

Handling Neodymium Disc Magnets

Neodymium magnets are hard and brittle despite their strong magnetic properties.

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

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

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

Safety Information

Strong 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, falling equipment or property damage, use suitable mechanical retention rather than relying solely on magnetic attraction.

Please Note

This product is a Neodymium Disc Magnet measuring 30mm 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 the magnetic grade, magnetisation, target steel composition and thickness, available contact area, air gaps, surface condition, magnetic circuit, load direction and operating conditions.

The stated 30mm 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.