Ferrite Cylinder Magnet – 4mm x 5mm

The Ferrite Cylinder Magnet – 4mm x 5mm is a compact ceramic permanent magnet measuring 4mm in diameter x 5mm long. Manufactured from ferrite magnetic material, this small cylindrical magnet provides a practical and economical magnetic solution for product assemblies, sensors, educational projects, models, craft applications, positioning systems, prototypes and custom OEM products.

Also known as a ceramic cylinder magnet, ferrite rod magnet, round ferrite magnet or small cylindrical permanent magnet, its compact 4mm x 5mm profile makes it suitable for applications where installation space is limited. Ferrite magnets offer good natural resistance to corrosion and demagnetisation, making them a popular permanent magnetic material for many general-purpose applications.

As a permanent magnet, this ferrite cylinder requires no electricity, batteries or charging to maintain its magnetic field.

Key Features

• 4mm diameter
• 5mm length
• Compact cylindrical shape
• Ferrite / ceramic permanent magnetic material
• Economical permanent magnet
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Suitable for compact magnetic assemblies
• Useful for educational and experimental applications
• Suitable for models, prototypes and product development
• Permanent magnetic operation
• No electricity or batteries required
• Suitable for custom and OEM applications

Common Applications

• Small product assemblies
• Models and miniatures
• Educational projects
• School science experiments
• Sensors and instrumentation
• Magnetic positioning
• Craft and DIY projects
• Small magnetic closures
• Prototypes
• Product development
• Manufacturing
• Research and laboratory projects
• Custom magnetic assemblies
• OEM products

4mm Diameter x 5mm Long Ferrite Cylinder Magnet

This ferrite cylinder magnet measures:

• Diameter: 4mm
• Length: 5mm

The compact cylindrical geometry allows the magnet to be integrated into small housings, recesses and product assemblies where a conventional larger disc or block magnet may not be appropriate.

Potential installation locations include:

• Cylindrical recesses
• Small product housings
• Models
• Educational equipment
• Prototype components
• Sensor assemblies
• Custom manufactured products

The physical dimensions describe the size of the magnet and should not be interpreted as a magnetic pull-force or holding-capacity rating.

Ferrite Ceramic Permanent Magnet

Ferrite magnets, also commonly called ceramic magnets, are widely used permanent magnets manufactured from iron oxide combined with ceramic magnetic materials.

They are popular because they provide a useful combination of:

• Permanent magnetic performance
• Economical cost
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Suitability for a broad range of general-purpose applications

Ferrite magnets typically have a dark grey to black ceramic appearance and generally do not require a protective metallic coating for ordinary corrosion protection.

The specific ferrite magnetic grade of this 4mm x 5mm cylinder has not been supplied and should not be assumed.

Compact Magnetic Assemblies

The small 4mm diameter x 5mm length makes this ferrite cylinder magnet suitable for integration into compact assemblies.

Potential uses include:

• Magnetic locating components
• Small closures
• Positioning systems
• Product mechanisms
• Educational equipment
• Models and miniatures
• Prototype devices
• OEM components

When designing a recess or housing, adequate clearance should be provided rather than force-fitting the magnet into position.

Sensors and Instrumentation

Small ferrite cylinder magnets may be incorporated into suitable sensing and instrumentation applications.

Potential uses can include:

• Position sensing
• Proximity detection
• Magnetic switches
• Educational sensor demonstrations
• Mechanical position indicators
• Prototype instrumentation

Suitability for a particular sensor depends on factors such as magnetisation direction, magnetic field strength, operating distance, sensor sensitivity and installation geometry.

These characteristics should be confirmed for the intended application rather than inferred from the magnet's dimensions.

Magnetisation Direction

The magnetisation direction of this ferrite cylinder magnet has not been supplied.

Cylinder magnets may be produced with different magnetic orientations, so the position of the north and south poles should not be assumed solely from the shape of the magnet.

Magnetisation direction can affect:

• Pole location
• Sensor operation
• Magnet-to-magnet interaction
• Holding performance
• Working orientation
• Magnetic circuit design

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

Magnetic Holding Performance

Actual magnetic performance depends on factors including:

• Ferrite magnetic grade
• Magnetisation direction
• Target steel composition
• Target steel thickness
• Available contact area
• Air gaps
• Surface condition
• Magnet orientation
• Load direction
• Magnetic circuit design

No specific pull force or magnetic flux density in Gauss has been supplied for this product and these values should not be inferred from its 4mm x 5mm dimensions.

Air Gaps and Small Magnets

Because this is a compact magnet, small physical gaps can have a noticeable effect on magnetic performance.

Separation can be created by:

• Paint
• Adhesive
• Plastic
• Dirt
• Rust
• Protective coatings
• Uneven surfaces

For applications requiring magnetic attraction to steel, minimising unnecessary gaps between the magnet and target material can help improve practical performance.

Bonding a Ferrite Cylinder Magnet

This small cylinder magnet may be bonded into a compatible housing or recess using an adhesive suitable for the magnet and substrate.

For adhesive installation:

• Clean the bonding surfaces
• Remove grease, dust and contamination
• Select a suitable adhesive
• Follow the adhesive manufacturer's instructions
• Avoid excessively thick adhesive layers
• Allow the adhesive to cure fully
• Avoid force-fitting the magnet into an undersized recess

Ferrite is a hard and brittle ceramic material, so excessive mechanical pressure during installation can crack or chip the magnet.

Compatible Target Materials

Ferrite magnets attract ferromagnetic iron and compatible steels.

Suitable targets may include:

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

Ferrite magnets will not effectively attract non-magnetic materials such as:

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

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

Ferrite vs Neodymium Cylinder Magnets

Ferrite and neodymium are both permanent magnetic materials, but their characteristics differ.

Ferrite magnets generally provide:

• Economical magnetic performance
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Suitability for many general-purpose applications
• No need for a protective metallic coating in many environments

Neodymium magnets generally provide:

• Significantly higher magnetic strength relative to size
• Greater magnetic performance from compact dimensions
• Suitability for applications where space is restricted and higher magnetic strength is required

Ferrite is often selected where cost effectiveness, corrosion resistance and reliable permanent magnetic performance are more important than achieving maximum magnetic strength from the smallest possible magnet.

Educational and Science Applications

The compact size of this ferrite cylinder magnet can make it useful for supervised educational and experimental applications involving magnetic principles.

Potential demonstrations include:

• Magnetic attraction
• Magnetic repulsion
• North and south poles
• Magnetic fields
• Ferromagnetic materials
• Magnet-to-magnet interaction
• Simple magnetic mechanisms

Because the magnetisation direction has not been supplied, pole locations should be identified experimentally or confirmed before demonstrations that depend on a specific pole orientation.

Permanent Magnetic Operation

This 4mm x 5mm ferrite cylinder is a permanent magnet.

It requires:

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

Its magnetic field remains continuously active during normal use.

Technical Specifications

• Product Type: Ferrite Cylinder Magnet
• Alternative Names: Ceramic Cylinder Magnet, Ferrite Rod Magnet, Cylindrical Ferrite Magnet, Small Ceramic Magnet
• Diameter: 4mm
• Length: 5mm
• Shape: Cylinder
• Magnetic Material: Ferrite / Ceramic
• Magnet Type: Permanent Magnet
• Magnetic Operation: Permanent
• Power Required: None
• Target Materials: Compatible ferromagnetic iron and steel
• Primary Functions: Magnetic attraction, positioning and integration into small magnetic assemblies
• Typical Applications: Product assemblies, models, education, sensors, prototypes, craft and OEM products

Handling Ferrite Cylinder Magnets

Ferrite is a hard and brittle ceramic magnetic material.

Although ferrite magnets are durable under appropriate operating conditions, they may chip, crack or break if subjected to impact or excessive mechanical stress.

Avoid:

• Dropping the magnet onto hard surfaces
• Allowing magnets to collide forcefully
• Applying excessive sideways force
• Force-fitting into undersized recesses
• Drilling
• Cutting
• Conventional machining

Broken ferrite fragments may have sharp edges and should be handled carefully.

Please Note

This product is a Ferrite Cylinder Magnet measuring 4mm in diameter x 5mm long, manufactured from ferrite / ceramic permanent magnetic material.

No specific ferrite grade, pull force, Gauss rating, magnetisation direction, dimensional tolerance, coating 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, available contact area, air gaps, surface condition, magnet orientation and magnetic circuit design.

Ferrite is naturally corrosion resistant in many environments but is also a hard and brittle ceramic material. Avoid impact, drilling, cutting, machining and force-fitting.

Due to the very small dimensions of this magnet, keep it securely away from babies and young children and do not allow it to be swallowed or inserted into the body.