Neodymium Ring Magnet – 14mm OD x 7mm ID x 5mm H

The Neodymium Ring Magnet – 14mm OD x 7mm ID x 5mm H is a compact rare earth permanent magnet measuring 14mm outside diameter (OD) x 7mm inside diameter (ID) x 5mm high. Manufactured from Neodymium Iron Boron (NdFeB), this annular magnet combines a useful central through-hole with the high magnetic performance relative to size associated with neodymium magnetic material.

Its compact ring-shaped geometry makes it suitable for engineering, manufacturing, small product assemblies, positioning and alignment systems, sensors, instrumentation, fixtures, mechanical components, research projects and custom OEM applications. The 7mm central opening can also provide clearance for appropriately sized shafts, rods, tubes, pins or locating components where the dimensions and tolerances of the complete assembly are compatible.

Also known as a neodymium ring magnet, rare earth ring magnet, NdFeB ring magnet, annular neodymium magnet, donut magnet or ring-shaped rare earth magnet, this compact magnetic component provides permanent magnetic operation without electricity, batteries or charging.

Key Features

• Outside diameter (OD): 14mm
• Inside diameter (ID): 7mm
• Height: 5mm
• Shape: Ring / annular
• Magnetic material: Neodymium Iron Boron (NdFeB)
• Magnet type: Rare earth permanent magnet
• Central opening: 7mm straight through-hole
• Compact 14mm outside diameter
• Low-profile 5mm height
• High magnetic performance relative to size
• Suitable for small product assemblies
• Useful for engineering and manufacturing
• Suitable for positioning and alignment
• Useful for sensors and instrumentation
• Suitable for fixtures and mechanical assemblies
• Useful for research, prototypes and OEM products
• Permanent magnetic operation
• No electricity, batteries or charging required

Common Applications

• Engineering
• Manufacturing
• Small product assemblies
• Mechanical assemblies
• Component positioning
• Alignment systems
• Fixtures and jigs
• Sensors and instrumentation
• Position detection
• Proximity sensing
• Magnetic switching
• Machinery components
• Equipment housings
• Models and prototypes
• Research and development
• Laboratory equipment
• Custom OEM products

14mm OD x 7mm ID x 5mm High Ring Magnet

This neodymium ring magnet measures:

• 14mm outside diameter
• 7mm inside diameter
• 5mm height

The central opening is half the outside diameter, creating a compact annular magnetic component with a relatively low-profile 5mm height.

This geometry can be useful where another mechanical feature needs to pass through or occupy the centre of the magnetic assembly.

Potential applications include:

• Circular housings
• Small mechanical assemblies
• Positioning systems
• Sensor assemblies
• Magnetic alignment
• Fixtures
• Prototype mechanisms
• Custom manufactured products

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

What Is a Neodymium Ring Magnet?

A neodymium ring magnet is an NdFeB rare earth permanent magnet with a central opening.

Unlike a solid disc or cylinder magnet, the ring-shaped geometry provides a through-hole that can allow the magnet to be incorporated around or alongside other mechanical components.

Depending on the application, ring magnets may be integrated with:

• Shafts
• Rods
• Tubes
• Pins
• Housings
• Locating features
• Sensor components
• Mechanical assemblies

The ring shape itself does not determine the magnet's pole orientation or magnetisation direction.

Neodymium Iron Boron Rare Earth Material

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

NdFeB magnets are widely incorporated into:

• Engineered products
• Manufacturing equipment
• Sensors
• Positioning systems
• Magnetic closures
• Fixtures
• Electronics
• Custom magnetic assemblies

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

7mm Central Through-Hole

This ring magnet has a 7mm inside diameter, creating a straight central opening through its 5mm height.

Depending on the finished assembly, this opening may provide clearance for:

• Shafts
• Rods
• Pins
• Tubes
• Locating components
• Housings
• Other mechanical features

However, a 7mm inside diameter does not automatically mean the magnet is suitable for a 7mm shaft, bolt, pin or tube.

Mechanical compatibility depends on:

• Actual magnet dimensions
• Dimensional tolerance
• Mating component dimensions
• Required installation clearance
• Thermal and mechanical conditions

Because neodymium is brittle, this magnet should never be force-fitted around an oversized or excessively tight component.

Product and Mechanical Assemblies

Compact neodymium ring magnets can be incorporated into a wide range of manufactured products.

Potential applications include:

• Equipment components
• Small mechanisms
• Positioning systems
• Alignment devices
• Sensor assemblies
• Fixtures
• Product housings
• Prototype products
• OEM assemblies

Where the magnet is installed into a housing, the design should provide appropriate mechanical support without placing unnecessary pressure on the brittle NdFeB material.

Sensors and Instrumentation

Small neodymium ring magnets can be useful in sensor and instrumentation systems where their magnetic field configuration is compatible with the selected sensor.

Potential applications include:

• Position detection
• Proximity sensing
• Magnetic switching
• Hall-effect sensing
• Reed switch activation
• Instrumentation
• Equipment monitoring

Sensor performance depends on:

• Magnetisation direction
• Pole orientation
• Magnet-to-sensor distance
• Sensor sensitivity
• Installation geometry
• Surrounding magnetic materials

The magnetisation configuration has not been supplied and should be confirmed for sensor applications.

Magnetisation Direction

Ring magnets can be manufactured with a variety of magnetisation configurations.

A neodymium ring magnet may potentially be:

• Axially magnetised through its 5mm height
• Diametrically magnetised across its diameter
• Radially magnetised
• Multipole magnetised
• Manufactured with another specialised pole configuration

The actual magnetisation direction and pole configuration have not been supplied for this product.

Do not assume the poles are located on the two flat circular faces solely because the magnet has a ring-shaped geometry.

Magnetic Coupling Applications

Ring magnets may also be incorporated into magnetic coupling systems where the magnetisation configuration and overall design are appropriate.

Potential applications can include:

• Contactless magnetic coupling
• Rotating mechanisms
• Alignment systems
• Positioning devices
• Prototype mechanical assemblies

Suitability depends heavily on:

• Magnetisation direction
• Pole arrangement
• Neodymium grade
• Magnet spacing
• Number and arrangement of magnets
• Mechanical geometry

No coupling torque or force should be inferred from the magnet's dimensions alone.

Magnetic Performance

Practical magnetic performance depends on multiple factors, including:

• Neodymium grade
• Magnetisation direction
• Pole configuration
• Magnetic circuit
• 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 magnet.

These values should not be inferred from its 14mm OD x 7mm ID x 5mm H dimensions.

Direct Pull vs Shear Force

Where the ring magnet is used against compatible ferromagnetic steel, magnetic holding depends on load direction.

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

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

Shear performance can be influenced by:

• Surface friction
• Contact quality
• Paint and coatings
• Installation orientation
• Air gaps
• Mechanical leverage
• Vibration

Test the completed assembly under realistic conditions where magnetic holding is important.

Air Gaps and Magnetic Attraction

Even small gaps can significantly affect the performance of compact neodymium magnets.

Potential sources of air gaps include:

• Paint
• Powder coating
• Adhesive
• Plastic
• Protective films
• Product housings
• Dirt
• Rust
• Mechanical clearance

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

Target Steel Thickness

Where the magnet operates against ferromagnetic steel, the target material is part of the magnetic system.

Performance can be affected by:

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

Thin steel may not provide the same magnetic response as a suitably thick ferromagnetic target.

Testing against the actual target material is recommended for performance-critical applications.

Bonding a Neodymium Ring Magnet

This ring magnet can be adhesively bonded into an appropriately designed product or housing.

Before bonding:

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

Avoid Force-Fitting Through the 7mm Hole

Neodymium Iron Boron is hard but brittle.

Do not force an oversized shaft, pin, bolt, tube or other component through the 7mm central opening.

Excessive mechanical pressure may cause the magnet to:

• Chip
• Crack
• Split
• Fracture

Appropriate clearance should be provided between the magnet and mating component.

Do Not Machine Neodymium Magnets

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

Avoid:

• Drilling
• Cutting
• Grinding
• Crushing
• Machining
• Enlarging the central hole

These processes can damage the brittle magnetic material and any protective surface coating.

If another inside diameter or overall size is required, select 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 Ring Magnets

Neodymium and ferrite ring magnets provide different magnetic characteristics.

Neodymium ring magnets generally provide:

• Higher magnetic performance relative to size
• Strong magnetic properties from compact dimensions
• Advantages in space-restricted assemblies
• Suitability for compact sensors and engineered products

Ferrite ring magnets generally provide:

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

Neodymium is commonly selected where higher magnetic performance within a compact ring-shaped component is important.

Permanent Magnetic Operation

This neodymium ring 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 Ring Magnet
• Alternative Names: Rare Earth Ring Magnet, NdFeB Ring Magnet, Neodymium Annular Magnet, Donut Magnet, Ring-Shaped Rare Earth Magnet
• Outside Diameter (OD): 14mm
• Inside Diameter (ID): 7mm
• Height: 5mm
• Central Opening: Straight through-hole
• Shape: Ring / Annular
• 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, positioning, alignment, sensing and product integration
• Typical Applications: Engineering, manufacturing, product assemblies, sensors, fixtures, machinery, research, prototypes and OEM products

Safety and Handling

Small neodymium magnets can attract each other or nearby ferromagnetic objects suddenly.

Handle carefully to reduce the risk of:

• Pinched skin
• Magnet collisions
• Chipping
• Cracking
• Fragmentation

Neodymium is brittle despite its high magnetic performance. Avoid uncontrolled collisions and excessive mechanical pressure.

Serious Ingestion Hazard

Small neodymium magnets present a serious ingestion hazard.

If multiple magnets are swallowed, or a magnet is swallowed with another magnetic or metallic object, they can attract through internal tissue and cause severe injury.

Keep this magnet securely away from babies and children.

Where small magnets are incorporated into another product, they should be securely retained so they cannot become loose or accessible during normal use or reasonably foreseeable misuse.

Seek urgent medical attention if magnet ingestion is suspected.

Permanent magnets should also be kept an appropriate distance from pacemakers, implanted medical devices, magnetic storage media, magnetic cards and sensitive electronic equipment.

Please Note

This product is a Neodymium Ring Magnet measuring 14mm outside diameter (OD) x 7mm inside diameter (ID) x 5mm high, manufactured from Neodymium Iron Boron (NdFeB) rare earth magnetic material.

The 7mm inside diameter describes the physical size of the central through-hole and does not automatically indicate compatibility with a 7mm shaft, pin, tube, bolt or other component. Appropriate dimensional tolerance and mechanical clearance should be considered.

No specific neodymium grade, pull force, Gauss rating, coating or plating, magnetisation direction, pole configuration, 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 configuration, magnetic circuit, target material, target steel thickness, available contact area, surface condition, air gaps, load direction and installation geometry.

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

The stated 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.