Neodymium Block Magnet – 55mm x 25mm x 9mm

The Neodymium Block Magnet – 55mm x 25mm x 9mm is a rectangular rare earth permanent magnet measuring 55mm long x 25mm wide x 9mm thick. Manufactured from Neodymium Iron Boron (NdFeB), this block magnet provides the high magnetic performance relative to size associated with neodymium magnetic material and is suitable for engineering, manufacturing, industrial equipment, fixtures, product assemblies, positioning systems and custom OEM applications.

Its elongated rectangular geometry provides a broad 55mm x 25mm face while maintaining a relatively low-profile 9mm thickness. This format can be useful for integration into housings, machinery, fixtures, removable components, magnetic closures, displays and other applications requiring a rectangular magnetic element.

Also known as a neodymium block magnet, rare earth block magnet, NdFeB block magnet, rectangular neodymium magnet, rare earth rectangular magnet or neodymium bar magnet, this permanent magnet operates continuously without electricity, batteries or charging.

Key Features

• Length: 55mm
• Width: 25mm
• Thickness: 9mm
• Shape: Rectangular block
• Magnetic material: Neodymium Iron Boron (NdFeB)
• Magnet type: Rare earth permanent magnet
• Broad 55mm x 25mm rectangular face
• Relatively low-profile 9mm thickness
• High magnetic performance relative to size
• Suitable for engineering and manufacturing
• Useful for industrial equipment and machinery
• Suitable for fixtures and jigs
• Useful for positioning and alignment
• Suitable for product assemblies
• Useful for magnetic closures and removable components
• Suitable for prototypes and custom OEM applications
• Permanent magnetic operation
• No electricity, batteries or charging required

Common Applications

• Engineering
• Manufacturing
• Industrial equipment
• Machinery
• Product assemblies
• Fixtures and jigs
• Component positioning
• Alignment systems
• Magnetic closures
• Removable components
• Equipment housings
• Displays and signage
• Furniture and cabinetry
• Workshop applications
• Research and development
• Laboratory equipment
• Prototype devices
• Custom OEM assemblies

55mm x 25mm x 9mm Rectangular Magnet

This neodymium block magnet measures 55mm long x 25mm wide x 9mm thick.

Its rectangular profile provides a large flat surface relative to its thickness, making the magnet suitable for applications where a broad magnetic component needs to fit within a comparatively shallow space.

Potential applications include:

• Recessed magnetic assemblies
• Equipment housings
• Fixtures
• Positioning systems
• Removable panels
• Magnetic closures
• Machinery components
• Custom product designs

The dimensions describe the physical geometry of the magnet and should not be interpreted as a magnetic pull force or safe working load.

Neodymium Iron Boron Rare Earth Magnet

Neodymium Iron Boron is a high-performance rare earth permanent magnetic material widely used where substantial magnetic properties are required within compact dimensions.

NdFeB magnets are commonly incorporated into:

• Industrial equipment
• Manufactured products
• Fixtures
• Sensors
• Magnetic closures
• Positioning systems
• Machinery
• Custom magnetic assemblies

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

Broad 55mm x 25mm Face

The magnet's 55mm x 25mm rectangular face provides a substantial surface area for incorporation into appropriately designed assemblies.

Where this face is intended to operate against ferromagnetic steel, practical holding will depend on factors such as:

• Magnetisation direction
• Target steel thickness
• Surface flatness
• Available contact area
• Air gaps
• Surface coatings
• Load direction

A large contact face alone does not establish a particular holding force.

Low-Profile 9mm Thickness

At 9mm thick, this block magnet has a relatively low-profile geometry compared with its 55mm length and 25mm width.

This can be useful where installation depth is limited, including:

• Shallow recesses
• Equipment panels
• Product housings
• Cabinetry
• Fixtures
• Display systems
• Machinery components

Because neodymium is brittle, the magnet should be mechanically supported appropriately rather than used as a structural component.

Fixtures, Jigs and Positioning

Rectangular neodymium magnets can be incorporated into fixtures and jigs for magnetic positioning and alignment.

Potential functions include:

• Component locating
• Temporary positioning
• Assembly aids
• Inspection fixtures
• Repeatable alignment
• Prototype tooling
• Removable fixture components

Where magnetic retention is important, test the complete fixture under realistic operating conditions.

Magnetic Closures and Removable Components

This block magnet may also be useful in appropriately designed magnetic closure systems.

Potential applications include:

• Panels
• Covers
• Access doors
• Cabinetry
• Furniture
• Display components
• Equipment housings
• Removable product components

Closure performance depends on the mating component, air gap, magnet orientation and mechanical geometry of the finished assembly.

Where accidental opening could create a safety hazard, appropriate mechanical retention should also be used.

Magnetisation Direction

Rectangular neodymium block magnets can be manufactured with different magnetisation directions.

A 55mm x 25mm x 9mm block magnet could potentially be magnetised:

• Through the 9mm thickness
• Across the 25mm width
• Along the 55mm length
• In another application-specific configuration

The magnetisation direction and pole orientation have not been supplied and should not be assumed from the magnet's shape.

Confirm the pole orientation where magnetic direction is important to the application.

Magnetic Performance

Practical magnetic performance depends on more than the magnet's physical dimensions.

Important factors include:

• Neodymium grade
• Magnetisation direction
• Pole configuration
• Magnetic circuit design
• Target steel composition
• Target steel thickness
• Available contact area
• Surface condition
• Air gaps
• Load direction
• Mechanical leverage

No specific pull force or magnetic flux density in Gauss has been supplied for this product.

These values should not be inferred from the 55mm x 25mm x 9mm dimensions alone.

Pull Force vs Safe Working Load

A magnet's pull-force figure, where supplied, is normally determined under specific test conditions.

It should not automatically be interpreted as the amount of weight that a magnet can safely support in a real-world installation.

Holding performance may be reduced by:

• Thin target steel
• Paint
• Powder coating
• Rust
• Dirt
• Uneven contact
• Air gaps
• Side loading
• Mechanical leverage
• Vibration

No pull-force figure has been supplied for this magnet.

The magnet's physical dimensions do not establish a safe working load.

Direct Pull vs Shear Force

Magnetic holding changes according to the direction of the applied load.

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

Shear loading occurs when the magnet is encouraged to slide parallel to the target.

Shear holding can be significantly affected by:

• Surface friction
• Surface coatings
• Installation orientation
• Contact quality
• Mechanical leverage
• Vibration

For vertically mounted or dynamically loaded applications, test the complete assembly under realistic conditions.

Air Gaps and Magnetic Attraction

Neodymium magnetic attraction can decrease significantly when a gap exists between the magnet and target.

Air gaps can be created by:

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

For maximum practical magnetic attraction, unnecessary separation should generally be minimised.

Target Steel Thickness

Target steel thickness and composition influence the performance of a magnetic assembly.

Important factors include:

• Steel thickness
• Steel grade
• Target dimensions
• Contact area
• Surface condition
• Magnetic saturation

Thin steel may not provide the same magnetic response as a suitable thicker ferromagnetic target.

Testing against the actual target steel is recommended where performance is important.

Bonding a Neodymium Block Magnet

Adhesive bonding can be used to integrate this magnet into a suitable housing or product assembly.

Before bonding:

• Confirm the required magnetic orientation
• Check polarity where multiple magnets are involved
• Clean both bonding surfaces
• Remove grease, dust and contamination
• Select an adhesive compatible with the magnet's actual surface finish
• Provide appropriate 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 with the actual magnet surface should be confirmed.

Avoid Force-Fitting

Neodymium Iron Boron is hard but brittle.

A neodymium magnet should not be forced into an undersized recess or housing.

Excessive pressure can cause:

• Chipping
• Cracking
• Fracturing
• Damage to the magnet's surface finish

Provide appropriate clearance and use suitable retention methods.

Avoid Bending and Prying

The magnet's broad face and 9mm thickness mean mechanical leverage should be considered during installation and removal.

Do not use the magnet itself as a lever or structural component.

Prying one edge away from a strongly attracted steel surface can create concentrated mechanical stress and may damage the brittle magnetic material.

Where repeated removal is required, design the assembly with an appropriate mechanical release method.

Do Not Machine Neodymium Magnets

Finished neodymium magnets should not be modified using conventional workshop processes.

Avoid:

• Drilling
• Cutting
• Grinding
• Crushing
• Machining

These processes can damage the magnet and any protective surface coating.

If another size, hole or geometry is required, use a magnet manufactured to the appropriate dimensions.

Compatible Target Materials

Neodymium magnets attract suitable ferromagnetic materials, including:

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

They will not effectively attract inherently non-magnetic materials such as:

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

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

Neodymium vs Ferrite Block Magnets

Neodymium and ferrite block magnets provide different advantages.

Neodymium block magnets generally provide:

• Higher magnetic performance relative to size
• Strong magnetic properties from compact dimensions
• Advantages in space-restricted designs
• Suitability for high-performance magnetic assemblies

Ferrite block magnets generally provide:

• Lower cost
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Suitability where larger magnet dimensions are acceptable

Neodymium is commonly selected where higher magnetic performance from a relatively compact rectangular magnet is an important design requirement.

Permanent Magnetic Operation

This neodymium block 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 Block Magnet
• Alternative Names: Rare Earth Block Magnet, NdFeB Block Magnet, Rectangular Neodymium Magnet, Rare Earth Rectangular Magnet, Neodymium Bar Magnet
• Length: 55mm
• Width: 25mm
• Thickness: 9mm
• Shape: Rectangular Block
• Magnetic Material: Neodymium Iron Boron (NdFeB)
• Magnet Type: Rare Earth Permanent Magnet
• Magnetic Operation: Permanent
• Power Required: None
• Compatible Targets: Suitable ferromagnetic iron and steel
• Primary Functions: Magnetic attraction, holding, positioning, alignment and product integration
• Typical Applications: Engineering, manufacturing, industrial equipment, fixtures, machinery, closures, product assemblies, research, prototypes and OEM products

Safety and Handling

A neodymium block magnet of this size can produce substantial magnetic attraction and should be handled carefully.

Keep the magnet under control when approaching:

• Other magnets
• Steel surfaces
• Ferromagnetic tools
• Machinery
• Metal components

Sudden attraction can create:

• Finger pinch hazards
• Trapping injuries
• Magnet collisions
• Chipping
• Cracking
• Fragmentation

Neodymium is brittle despite its strong magnetic properties. Eye protection may be appropriate where fragmentation is possible.

Keep powerful permanent magnets an appropriate distance from:

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

Keep magnets securely away from children.

Please Note

This product is a Neodymium Block Magnet measuring 55mm long x 25mm wide x 9mm 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 neodymium grade, magnetisation direction, magnetic circuit, target steel composition and thickness, available contact area, surface condition, air gaps, load direction and mechanical leverage.

Neodymium is a hard and brittle magnetic material. Avoid impact, bending, prying, force-fitting, drilling, cutting, grinding or machining.

The stated 55mm x 25mm x 9mm dimensions describe the physical geometry of the magnet and do not represent its pull force, holding capacity or safe working load.

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