Ferrite Disc Magnet – 20mm x 6mm

The Ferrite Disc Magnet – 20mm x 6mm is a versatile ceramic permanent magnet measuring 20mm in diameter x 6mm thick. Manufactured from ferrite magnetic material, this round magnet provides an economical and reliable magnetic solution for craft, product assemblies, displays, signage, magnetic closures, education, manufacturing and custom OEM applications.

Also known as a ceramic disc magnet, round ferrite magnet, ceramic magnet or 20mm ferrite magnet, its compact circular profile makes it easy to integrate into housings, recessed mounting points and bonded magnetic assemblies. Ferrite magnets offer good natural corrosion resistance and resistance to demagnetisation, making them a popular choice for general-purpose magnetic applications.

As a permanent magnet, this 20mm x 6mm ferrite disc requires no electricity, batteries or charging to maintain its magnetic field.

Key Features

• 20mm diameter
• 6mm thickness
• Round disc-shaped permanent magnet
• Ferrite / ceramic magnetic material
• Economical magnetic solution
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Suitable for magnetic holding and positioning
• Useful for product assemblies and closures
• Suitable for craft and DIY applications
• Useful for educational magnetic demonstrations
• Permanent magnetic operation
• No electricity or batteries required
• Suitable for custom and OEM applications

Common Applications

• Craft and DIY projects
• Fridge magnet assemblies
• Displays and signage
• Product assemblies
• Magnetic closures
• Furniture and cabinetry
• Educational projects
• School science experiments
• Promotional products
• Magnetic positioning
• Manufacturing
• Models and prototypes
• Custom magnetic products
• OEM applications

20mm Diameter x 6mm Thick Ferrite Disc Magnet

This ferrite disc magnet measures:

• Diameter: 20mm
• Thickness: 6mm

Its circular 20mm face combined with a 6mm thickness creates a compact disc format suitable for integration into a wide variety of magnetic assemblies.

Potential installation methods include:

• Bonding into circular recesses
• Integrating into plastic or timber housings
• Attaching to product components
• Incorporating into magnetic closures
• Using as part of displays or signage
• Integrating into custom manufactured products

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

Ferrite Ceramic Permanent Magnet

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

They offer a useful combination of:

• Economical cost
• Permanent magnetic performance
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Suitability for many general-purpose applications

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

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

Craft and DIY Applications

The compact 20mm x 6mm format makes this ferrite disc magnet useful for many craft and DIY projects.

Potential uses include:

• Handmade fridge magnets
• Decorative magnetic products
• Craft displays
• Magnetic signs
• Models
• Educational projects
• Removable decorations
• Custom magnetic assemblies

Where the magnet is bonded to another material, choose an adhesive suitable for both the ferrite surface and the substrate.

Fridge Magnet and Display Applications

Ferrite disc magnets are commonly incorporated into fridge magnets, displays and lightweight magnetic products.

They may be bonded behind:

• Decorative items
• Printed products
• Signs
• Promotional items
• Craft pieces
• Display components

Performance depends on the weight of the attached item, target steel, available magnetic contact, air gaps and loading direction.

The suitability of this magnet should be tested in the finished assembly rather than determined from dimensions alone.

Magnetic Closures and Product Assemblies

This 20mm ferrite disc magnet can also be integrated into magnetic closure and retention systems.

Potential applications include:

• Boxes
• Cabinets
• Furniture
• Product enclosures
• Removable panels
• Display components
• Custom products

Where two magnets are used together, confirm their pole orientation before permanently bonding them into an assembly.

For applications where failure of a magnetic closure could create a hazard, suitable secondary mechanical retention should be incorporated.

Magnetisation Direction

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

Disc magnets can be produced with different magnetic configurations, so the location of the north and south poles should not be assumed solely from the magnet's shape.

Magnetisation direction can affect:

• Working face orientation
• Magnet-to-magnet attraction
• Magnetic holding
• Sensor response
• Pole location
• Magnetic circuit design

Where magnetic orientation is important, confirm the magnetisation direction before installation.

Magnetic Holding Performance

Actual magnetic performance depends on factors including:

• Ferrite magnetic grade
• Magnetisation direction
• Target steel thickness
• Target steel composition
• Available contact area
• Surface flatness
• Air gaps
• Paint and coatings
• 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 solely from its 20mm x 6mm dimensions.

Direct Pull vs Shear Force

Magnetic holding performance varies according to the direction of the applied load.

Direct pull occurs when the load attempts to separate the magnet perpendicular to the target surface.

Shear loading occurs when the magnet is subjected to a force parallel to the target surface, encouraging it to slide.

Practical vertical holding performance may therefore be lower than ideal direct-pull performance.

Air Gaps and Surface Condition

Ferrite magnets generally provide better practical attraction when positioned close to suitable ferromagnetic steel.

Magnetic performance can be reduced by gaps created by:

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

For magnetic holding applications, minimising unnecessary separation between the magnet and target steel can improve practical performance.

Bonding a 20mm x 6mm Ferrite Disc Magnet

The flat disc geometry makes this magnet suitable for bonding into compatible housings and recessed mounting points.

For adhesive installation:

• Clean the magnet and substrate
• Remove dust, oil and contamination
• Select an adhesive compatible with both materials
• 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 can cause cracking or chipping.

Compatible Target Materials

Ferrite magnets attract ferromagnetic iron and compatible steels.

Suitable target materials may include:

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

They 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 Disc Magnets

Ferrite and neodymium are both permanent magnetic materials but offer different characteristics.

Ferrite magnets generally provide:

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

Neodymium magnets generally provide:

• Significantly greater magnetic strength relative to size
• More compact designs for a given magnetic requirement
• High magnetic performance where installation space is limited

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

Educational and Science Applications

Ferrite disc magnets are useful for supervised classroom and educational activities 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 magnetisation direction has not been supplied, pole locations should be confirmed where an experiment depends on a specific magnetic orientation.

Permanent Magnetic Operation

This 20mm x 6mm ferrite disc 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 Disc Magnet
• Alternative Names: Ceramic Disc Magnet, Round Ferrite Magnet, Ceramic Magnet, 20mm Ferrite Magnet
• Diameter: 20mm
• Thickness: 6mm
• Shape: Disc / Round
• 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, holding, positioning and integration into magnetic assemblies
• Typical Applications: Craft, fridge magnets, displays, closures, education, manufacturing, prototypes and OEM products

Handling Ferrite Disc Magnets

Ferrite is a hard and brittle ceramic magnetic material.

The magnet may chip, crack or fracture if dropped onto a hard surface or allowed to collide forcefully with another magnet or steel object.

Avoid:

• Forceful impacts
• Dropping onto hard surfaces
• Excessive mechanical pressure
• Force-fitting into undersized recesses
• Drilling
• Cutting
• Conventional machining

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

Please Note

This product is a Ferrite Disc Magnet measuring 20mm in diameter x 6mm thick, 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 load direction.

Ferrite provides good natural corrosion resistance and resistance to demagnetisation but is a hard and brittle ceramic material. Avoid impact, drilling, cutting, machining and force-fitting.

Keep magnets securely away from babies and young children and supervise their use in educational or craft applications.