Ferrite Disc Magnet – 22mm x 3mm

The Ferrite Disc Magnet – 22mm x 3mm is a thin, circular ceramic permanent magnet measuring 22mm in diameter x 3mm thick. Manufactured from ferrite magnetic material, this low-profile disc magnet offers an economical and durable magnetic solution for product assemblies, displays, craft and DIY projects, educational activities, magnetic closures, manufacturing, prototypes and general-purpose magnetic applications.

Ferrite magnets, also known as ceramic magnets, are valued for their good natural resistance to corrosion and demagnetisation. Unlike metallic rare earth magnets, ferrite magnets typically have a dark grey to black ceramic appearance and generally do not require a protective coating for many indoor and appropriate outdoor applications.

Also known as a 22mm ceramic disc magnet, ferrite round magnet, ceramic round magnet or flat ferrite magnet, its broad 22mm circular face combined with a slim 3mm profile makes it useful where a relatively thin permanent magnet is required.

Key Features

• Diameter: 22mm
• Thickness: 3mm
• Shape: Disc / Round
• Magnetic material: Ferrite / Ceramic
• Low-profile permanent magnet
• Broad 22mm circular face
• Slim 3mm thickness
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Economical permanent magnetic material
• Suitable for product assemblies and general-purpose applications
• Useful for displays, craft and educational projects
• Suitable for magnetic closures and prototypes
• Permanent magnetic operation
• No electricity, batteries or charging required

Common Applications

• Product assemblies
• Fridge magnet assemblies
• Magnetic closures
• Displays
• Signage
• Craft and DIY projects
• Educational activities
• School science projects
• Models
• Manufacturing
• Fixtures and positioning
• Furniture components
• Prototype products
• Research and development
• OEM applications

22mm Diameter x 3mm Thick Disc Magnet

This ferrite disc magnet measures 22mm in diameter x 3mm thick, creating a broad, low-profile magnetic shape.

The slim 3mm thickness can make it suitable for applications where installation depth is limited, including:

• Shallow recesses
• Flat product assemblies
• Displays
• Signs
• Magnetic closures
• Craft projects
• Educational models
• Prototype products

Its circular geometry can also simplify integration into appropriately sized round recesses or housings.

Ferrite Ceramic Permanent Magnet

Ferrite is a widely used ceramic permanent magnetic material.

Ferrite magnets are commonly selected for applications where users require:

• Economical permanent magnetism
• Good natural corrosion resistance
• Good resistance to demagnetisation
• Reliable magnetic properties
• No electrical power requirement

Ferrite magnets generally have lower magnetic performance relative to their size than neodymium rare earth magnets, but their durability, corrosion resistance and economical cost make them suitable for a wide range of general-purpose applications.

The specific ferrite magnetic grade has not been supplied for this product and should not be assumed.

Low-Profile Magnetic Applications

At only 3mm thick, this ferrite disc has a relatively slim profile compared with its 22mm diameter.

This geometry can be useful for:

• Shallow product housings
• Magnetic backing applications
• Flat magnetic assemblies
• Display products
• Lightweight closures
• Educational products
• Custom manufactured components

Where the magnet is installed into a recess, provide suitable dimensional clearance rather than attempting to force-fit the brittle ceramic material.

Fridge Magnet and Display Assemblies

Ferrite disc magnets are commonly used as magnetic components in appropriately designed display and decorative products.

Potential applications include:

• Fridge magnet assemblies
• Souvenir magnets
• Promotional products
• Decorative displays
• Signs
• Craft products
• Printed magnetic products
• Custom display components

The magnet should be securely retained within the finished product, particularly where it could otherwise become detached.

Magnetic Closures

This flat ferrite disc magnet can also be incorporated into appropriately designed magnetic closure systems.

Potential uses include:

• Boxes
• Displays
• Lightweight covers
• Furniture components
• Craft products
• Custom enclosures

The magnet may attract compatible ferromagnetic steel or interact with another appropriately oriented permanent magnet.

Where two magnets are used together, confirm polarity and magnetisation orientation before permanent installation.

Educational and Science Applications

Ferrite magnets are frequently used for educational demonstrations and science projects because their magnetic properties can be observed without requiring electricity.

Potential uses include demonstrating:

• Magnetic attraction
• Magnetic poles
• Attraction and repulsion
• Ferromagnetic materials
• Magnetic fields
• Permanent magnetism

Magnets used in educational environments should always be handled under appropriate supervision.

Magnetisation Direction

Disc magnets can be manufactured with different magnetisation configurations.

For example, some disc magnets are magnetised through their thickness, while other configurations are possible.

The magnetisation direction and pole orientation have not been supplied for this 22mm x 3mm ferrite disc magnet and should not be assumed.

Where magnetic pole location or field direction is important to the application, confirm the magnetisation specification before installation.

Magnetic Performance

Practical magnetic performance depends on factors including:

• Ferrite grade
• Magnetisation direction
• Magnet dimensions
• Target steel composition
• Target steel thickness
• Available contact area
• Surface condition
• Air gaps
• Paint and coatings
• Load direction
• Installation geometry

No specific pull force or magnetic flux density in Gauss has been supplied for this ferrite magnet and these values should not be inferred from its dimensions alone.

Direct Pull vs Shear Force

Magnetic holding performance varies depending on how the load is applied.

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

Shear loading occurs when the applied load encourages the magnet to slide parallel to the surface.

Practical shear holding may be significantly lower than direct-pull performance and can be affected by:

• Surface friction
• Contact area
• Paint and coatings
• Installation orientation
• Vibration
• Mechanical leverage

Where holding performance is important, test the magnet under actual application conditions.

Air Gaps and Surface Contact

Magnetic attraction is generally strongest when the magnet is positioned close to a clean, flat ferromagnetic surface.

Performance can be reduced by gaps created by:

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

Because this magnet is only 3mm thick, application geometry and unnecessary air gaps should be carefully considered.

Bonding a Ferrite Disc Magnet

This 22mm x 3mm ferrite disc may be bonded into an appropriately designed product or recess.

Before bonding:

• Confirm polarity and required orientation
• Clean the bonding surfaces
• Remove grease, dust and contamination
• Select an adhesive suitable for the materials involved
• Provide appropriate dimensional clearance
• Avoid force-fitting
• Allow the adhesive to cure according to its instructions

Ferrite is a hard and brittle ceramic material, so excessive mechanical pressure should be avoided.

Compatible Target Materials

Ferrite 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.

Ferrite vs Neodymium Disc Magnets

Ferrite and neodymium magnets offer different advantages.

Ferrite disc magnets are generally:

• Economical
• Naturally corrosion resistant
• Resistant to demagnetisation
• Suitable for many general-purpose applications
• Available in practical sizes for product assemblies and educational use

Neodymium disc magnets generally provide:

• Greater magnetic performance relative to size
• Stronger magnetic properties from compact dimensions
• Advantages where installation space is limited

Ferrite can therefore be a practical choice where cost, corrosion resistance and general-purpose permanent magnetism are more important than achieving maximum magnetic strength from the smallest possible dimensions.

Ferrite Magnet Handling

Ferrite is a hard and brittle ceramic material.

Although ferrite magnets resist corrosion well, they can chip, crack or fracture if subjected to impact or excessive mechanical force.

Avoid:

• Dropping the magnet onto hard surfaces
• Allowing magnets to collide
• Applying excessive bending force
• Force-fitting into undersized recesses
• Drilling
• Cutting
• Grinding
• Machining

Design housings and assemblies so the magnet is appropriately supported and protected from unnecessary impact.

Permanent Magnetic Operation

This ferrite 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: Ferrite Disc Magnet
• Alternative Names: Ceramic Disc Magnet, Ferrite Round Magnet, Ceramic Round Magnet, Flat Ferrite Magnet
• Diameter: 22mm
• Thickness: 3mm
• 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, closure and product integration
• Typical Applications: Product assemblies, displays, craft, education, closures, manufacturing, models, prototypes and OEM products

Safety and Handling

Handle ferrite magnets carefully to prevent chipping or breakage.

If the magnet becomes cracked or damaged, small fragments may have sharp edges and should be handled and disposed of appropriately.

Magnets should also be kept an appropriate distance from:

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

Keep magnets away from babies and young children, particularly where a magnet could become detached from a finished product.

Do not drill, cut or grind ferrite magnets. In addition to potentially breaking the magnet, machining ceramic magnetic material can create hazardous dust and fragments.

Please Note

This product is a Ferrite Disc Magnet measuring 22mm in diameter x 3mm thick, manufactured from ferrite ceramic permanent magnetic material.

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

Actual magnetic performance depends on the ferrite grade, magnetisation direction, target steel composition and thickness, available contact area, air gaps, surface condition, load direction and installation geometry.

Ferrite magnets are hard and brittle. Avoid impact, force-fitting, drilling, cutting or machining.

The stated 22mm x 3mm dimensions describe the physical size of the magnet and do not represent its pull force, holding capacity or safe working load.