Neodymium Cylinder Magnet – 4mm x 10mm

The Neodymium Cylinder Magnet – 4mm x 10mm is a compact rare earth permanent magnet measuring 4mm in diameter x 10mm long. Manufactured from Neodymium Iron Boron (NdFeB), this small cylindrical magnet delivers high magnetic performance relative to its physical size and is suitable for precision engineering, sensing, positioning, manufacturing, craft, prototyping and OEM applications.

Also known as a neodymium rod magnet, rare earth cylinder magnet, NdFeB cylinder magnet or cylindrical neodymium magnet, its narrow 4mm diameter and elongated 10mm body make it particularly useful for applications where installation space is limited. It can be incorporated into small product housings, sensor systems, fixtures, models and custom magnetic assemblies.

As a permanent magnet, this 4mm x 10mm neodymium cylinder requires no electricity, batteries or charging to maintain its magnetic field.

Key Features

• 4mm diameter x 10mm length
• Neodymium Iron Boron (NdFeB)
• High-performance rare earth permanent magnet
• Compact cylindrical / rod shape
• Narrow 4mm diameter
• 10mm elongated body
• High magnetic performance relative to size
• Suitable for space-restricted applications
• Useful for holding and positioning
• Suitable for sensing and product integration
• Permanent magnetic operation
• No electricity or batteries required
• Suitable for precision, custom and OEM assemblies

Common Applications

• Sensors and switches
• Precision engineering
• Small magnetic assemblies
• Holding and positioning
• Product manufacturing
• Electronics assemblies
• Models and prototypes
• Craft and hobby projects
• Fixtures
• Research and development
• Educational projects
• Custom magnetic systems
• OEM products

Compact 4mm x 10mm Cylinder Magnet

This neodymium magnet measures 4mm in diameter x 10mm long, giving it a narrow cylindrical profile that can be integrated into applications where a larger magnet may not fit.

Potential installation locations include:

• Small cylindrical recesses
• Product housings
• Tubular components
• Sensor assemblies
• Mechanical components
• Models
• Fixtures
• Prototype equipment

The 4mm x 10mm dimensions describe the physical size of the magnet and should not be interpreted as a pull-force or load-capacity rating.

Neodymium Iron Boron Rare Earth Magnet

Neodymium Iron Boron (NdFeB) is a high-performance rare earth permanent magnetic material widely used in applications where strong magnetic properties are required within compact dimensions.

This makes neodymium magnets particularly useful for:

• Miniature magnetic assemblies
• Sensors
• Precision components
• Equipment
• Product manufacturing
• Engineering systems
• Custom magnetic mechanisms

The specific NdFeB magnetic grade of this magnet has not been supplied and should not be assumed.

Cylinder and Rod Magnet Applications

The elongated geometry of a cylinder magnet provides different design possibilities from thin disc or rectangular block magnets.

The 4mm diameter x 10mm length can make this magnet suitable for insertion or bonding into narrow holes and housings.

Potential uses include:

• Magnetic sensing
• Position detection
• Compact closures
• Mechanical positioning
• Product assemblies
• Models
• Fixtures
• Custom prototypes

The appropriate installation method depends on the magnetisation direction and mechanical requirements of the complete assembly.

Magnetisation Direction

The magnetisation direction of this 4mm x 10mm cylinder magnet has not been supplied.

Cylinder magnets can be manufactured with different pole orientations, and magnetisation direction can significantly affect how the magnet interacts with sensors, other magnets and ferromagnetic targets.

Where pole orientation or field direction is important, the magnetisation should be confirmed before installation.

Magnetic Holding Performance

Actual magnetic performance depends on more than the physical dimensions of the magnet.

Important factors include:

• Magnetic grade
• Magnetisation direction
• Target steel thickness
• Steel composition
• Available contact area
• Surface flatness
• Air gaps
• Paint and coatings
• Adhesive layers
• Magnet orientation
• Load direction
• Magnetic circuit design

No specific pull force or Gauss rating has been supplied for this product, so magnetic performance should not be inferred solely from its 4mm x 10mm dimensions.

Magnetic Attraction Decreases with Distance

Magnetic attraction decreases rapidly as the distance between a magnet and its target increases.

Layers that may create an air gap include:

• Paint
• Adhesive
• Plastic
• Paper
• Fabric
• Protective coatings
• Dirt
• Surface irregularities

Where attraction to steel is required, close contact with clean, flat and sufficiently thick ferromagnetic material will generally provide stronger practical performance.

Bonding Small Neodymium Cylinder Magnets

Small cylinder magnets are commonly bonded into compatible recesses and product housings.

Before bonding:

• Clean the magnet and substrate
• Select an adhesive compatible with both surfaces
• Avoid excessive force when inserting the magnet
• Follow the adhesive manufacturer's curing instructions
• Allow the adhesive to cure fully before loading the assembly

Neodymium magnetic material is brittle, so a cylinder magnet should not be force-fitted into an undersized hole or recess.

Compatible Target Materials

Neodymium magnets attract ferromagnetic iron and compatible steels.

Suitable target materials may include:

• Mild steel
• Iron
• Magnetic steel
• Ferromagnetic fasteners
• Compatible steel machinery components

They will not effectively attract:

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

Many stainless steel grades may also provide weak or negligible magnetic attraction and should be tested before use.

Neodymium vs Ferrite Magnets

Both neodymium and ferrite are permanent magnetic materials, but their performance characteristics differ.

Neodymium magnets generally provide:

• Much higher magnetic strength relative to size
• Compact dimensions
• Suitability for precision and miniature assemblies
• Strong magnetic performance where space is limited

Ferrite magnets are generally:

• More economical
• Naturally corrosion resistant
• Lower in magnetic strength relative to size
• Suitable for many general-purpose applications

The compact dimensions of this neodymium cylinder can make it particularly useful where a larger ferrite magnet would be impractical.

Permanent Magnetic Operation

This neodymium cylinder is a permanent magnet and requires no external power source to maintain its magnetic field.

It requires:

• No electricity
• No batteries
• No charging
• No electrical wiring

Its magnetic field remains continuously active during normal use.

Technical Specifications

• Product Type: Neodymium Cylinder Magnet
• Alternative Names: Neodymium Rod Magnet, Rare Earth Cylinder Magnet, NdFeB Cylinder Magnet, Cylindrical Neodymium Magnet, Small Rare Earth Magnet
• Diameter: 4mm
• Length: 10mm
• Shape: Cylinder / Rod
• Magnetic Material: Neodymium Iron Boron (NdFeB)
• Magnet Type: Rare Earth Permanent Magnet
• Magnetic Operation: Permanent
• Power Required: None
• Target Material: Compatible ferromagnetic iron and steel
• Primary Functions: Magnetic holding, positioning, sensing and integration into compact assemblies
• Typical Applications: Sensors, engineering, manufacturing, models, prototypes, fixtures and OEM products

Precision, Manufacturing and OEM Applications

The combination of a 4mm diameter and 10mm cylindrical length makes this magnet suitable for incorporation into compact manufactured products.

Potential users include:

• Engineers
• Product designers
• Sensor manufacturers
• Equipment manufacturers
• Electronics manufacturers
• Model makers
• Prototype developers
• Research laboratories
• OEM manufacturers

For technical applications, the magnet should be evaluated as part of the complete magnetic circuit and mechanical assembly.

Handling Small Neodymium Magnets

Neodymium magnets can produce strong attraction relative to their small size and should be handled carefully.

NdFeB is also a hard and brittle magnetic material. Magnets can chip, crack or fracture if they:

• Snap forcefully together
• Strike steel surfaces
• Are dropped
• Experience excessive mechanical stress

Do not drill, cut or machine neodymium magnets using conventional methods.

The narrow cylinder shape should also be protected from excessive sideways mechanical force.

Please Note

This product is a Neodymium Cylinder Magnet measuring 4mm in diameter x 10mm long.

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

Actual magnetic performance depends on magnetic grade, magnetisation direction, target steel thickness and composition, contact area, air gaps, surface condition, magnet orientation and load direction.

Neodymium Iron Boron is a hard and brittle material. Avoid drilling, cutting, machining, impact and uncontrolled collisions.

Small neodymium magnets present a serious ingestion hazard. Keep this magnet securely away from babies and children. If multiple magnets, or a magnet and another metal object, are swallowed, they can attract through internal tissue and cause severe injury requiring urgent medical attention.

Keep strong magnets away from pacemakers and other medical implants, magnetic storage media and sensitive electronic equipment.