Neodymium Disc Magnet – 23.6mm x 20mm | N44H | Max 120°C

The Neodymium Disc Magnet – 23.6mm x 20mm | N44H | Max 120°C is a high-performance rare earth permanent magnet measuring 23.6mm in diameter x 20mm thick. Manufactured from N44H grade Neodymium Iron Boron (NdFeB), this substantial round magnet combines strong magnetic performance with enhanced resistance to irreversible demagnetisation at elevated temperatures and has a specified maximum operating temperature of 120°C.

With a 23.6mm diameter and 20mm thickness, this magnet has a deep cylindrical disc profile rather than the thin geometry commonly associated with standard disc magnets. Its compact footprint, substantial magnetic material volume and high-temperature N44H grade make it suitable for appropriately engineered industrial equipment, machinery, sensors, manufacturing systems, fixtures, positioning applications, product assemblies, research and OEM magnetic systems.

The N44H grade is particularly useful where an application requires both high magnetic energy and greater temperature capability than standard-temperature neodymium grades. This makes the magnet suitable for environments where elevated operating temperatures need to be considered as part of the magnetic system design.

Also known as an N44H neodymium disc magnet, high-temperature rare earth magnet, NdFeB round magnet, 23.6mm neodymium magnet or high-temperature neodymium cylinder magnet, this permanent magnet operates continuously without electricity, batteries or charging.

Key Features

• Diameter: 23.6mm
• Thickness / height: 20mm
• Dimensions: 23.6mm diameter x 20mm thick
• Shape: Disc / round
• Material: Neodymium Iron Boron (NdFeB)
• Magnetic grade: N44H
• Temperature classification: H-grade neodymium
• Maximum operating temperature: 120°C
• Magnet type: Rare earth permanent magnet
• Enhanced elevated-temperature capability
• Strong magnetic performance relative to size
• Substantial 20mm thick profile
• Suitable for industrial and engineering applications
• Useful for machinery and equipment
• Suitable for positioning and alignment
• Useful for sensors and instrumentation
• Suitable for fixtures and jigs
• Useful for product and mechanical assemblies
• Suitable for research and prototype development
• Permanent magnetic operation
• No electricity, batteries or charging required

Common Applications

• High-temperature magnetic assemblies
• Engineering
• Manufacturing
• Industrial equipment
• Machinery
• Product assemblies
• Mechanical components
• Magnetic holding systems
• Positioning systems
• Alignment applications
• Fixtures and jigs
• Sensors and instrumentation
• Position detection
• Proximity sensing
• Magnetic switching
• Research and development
• Laboratory equipment
• Prototype devices
• Custom OEM magnetic assemblies

23.6mm Diameter x 20mm Thick Neodymium Magnet

This N44H neodymium magnet measures:

• 23.6mm diameter
• 20mm thickness / height

At 20mm thick, this product has a relatively deep cylindrical profile.

This geometry can be useful for integration into:

• Circular recesses
• Equipment housings
• Machinery
• Mechanical assemblies
• Magnetic fixtures
• Product components
• Positioning systems
• Prototype equipment
• Custom magnetic assemblies

The stated dimensions describe the physical geometry of the magnet and do not represent its pull force, holding capacity or safe working load.

N44H Grade Neodymium Magnet

This disc magnet is manufactured from N44H grade Neodymium Iron Boron.

The designation combines a high magnetic energy classification with an H-grade elevated-temperature rating.

The N44 component relates to the magnetic material's maximum energy product, while the H suffix identifies a neodymium material designed for increased resistance to irreversible demagnetisation at elevated temperatures compared with standard-temperature grades.

For this particular magnet, a maximum operating temperature of 120°C has been specified.

This combination can make N44H suitable where an application requires:

• Strong permanent magnetic performance
• Compact magnet dimensions
• Elevated operating temperatures
• Improved resistance to heat-related demagnetisation
• High magnetic energy density

What Does N44H Mean?

N44H is the grade designation for the Neodymium Iron Boron material used to manufacture this magnet.

The designation provides two important pieces of information.

N44 identifies the magnetic energy classification of the material.

H identifies an elevated-temperature neodymium classification designed for greater resistance to irreversible magnetic loss at higher temperatures than standard grades.

N44H does not directly specify:

• Pull force
• Surface Gauss
• Holding capacity
• Safe working load
• Magnetisation direction
• Pole orientation

These depend on the magnet's dimensions, magnetisation configuration and complete magnetic circuit.

Maximum Operating Temperature of 120°C

This N44H magnet has a specified maximum operating temperature of 120°C.

This makes it suitable for appropriately designed applications where operating temperatures may exceed the limits of standard-temperature neodymium magnets.

Potential environments may include:

• Industrial machinery
• Warm equipment housings
• Electronic assemblies
• Manufacturing equipment
• Sensors near heat-generating components
• Temperature-variable systems
• Engineered magnetic assemblies

The 120°C specification should be treated as a maximum operating temperature, not a target continuous operating temperature for every application.

Actual performance at elevated temperatures can also be affected by:

• Magnet geometry
• Magnetic circuit
• Magnetisation configuration
• Exposure duration
• Surrounding components
• External magnetic fields
• Application design

Where operation close to the maximum temperature is expected, appropriate engineering margins and application testing are recommended.

How Temperature Affects Neodymium Magnets

Neodymium magnets are affected by temperature.

As temperature increases, magnetic output generally decreases temporarily. Once the magnet cools, some of this reduction may be recovered.

However, exposure beyond the appropriate operating limits can cause irreversible magnetic loss, meaning the magnet may not fully recover its original magnetic performance after cooling.

The N44H grade is designed to provide improved resistance to this type of elevated-temperature demagnetisation compared with standard-temperature neodymium grades.

For this product, the supplied maximum operating temperature is 120°C.

High Magnetic Performance in a Compact Size

Neodymium Iron Boron provides high magnetic energy density compared with many other permanent magnetic materials.

The combination of:

• N44H grade
• 23.6mm diameter
• 20mm thickness
• 120°C maximum operating temperature

makes this magnet suitable for engineered applications where both magnetic performance and elevated-temperature capability are important.

Industrial and Engineering Applications

This N44H disc magnet may be incorporated into industrial equipment and engineered magnetic systems.

Potential applications include:

• Machinery
• Equipment assemblies
• Positioning systems
• Magnetic fixtures
• Component retention
• Alignment systems
• Product assemblies
• Sensor systems
• Prototype equipment

The actual suitability of the magnet depends on the required magnetic performance, operating temperature, magnetic circuit and mechanical environment.

Sensors and Instrumentation

N44H neodymium magnets can be useful in magnetic sensing systems, particularly where elevated operating temperatures are part of the design requirements.

Potential applications include:

• Hall-effect sensors
• Reed switches
• Position sensors
• Proximity detection
• Magnetic switching
• Equipment monitoring
• Instrumentation

Sensor performance depends on:

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

The magnetisation configuration has not been supplied and should be confirmed where magnetic field orientation is critical.

Positioning and Alignment

This N44H magnet may also be incorporated into magnetic positioning and alignment systems.

Potential functions include:

• Component locating
• Repeatable positioning
• Magnetic alignment
• Assembly assistance
• Fixture positioning
• Prototype mechanisms

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

Magnetisation Direction

Round neodymium magnets can be manufactured with different magnetisation configurations.

A 23.6mm diameter x 20mm thick magnet could potentially be:

• Axially magnetised through its 20mm thickness
• Diametrically magnetised across its 23.6mm diameter
• Manufactured with another specialised pole configuration

The actual magnetisation direction and pole configuration have not been supplied and should not be assumed from the magnet's shape.

Confirm this specification where magnetic field direction or pole location is important.

Magnetic Performance

Although this magnet is confirmed as N44H grade, practical magnetic performance depends on multiple factors.

These include:

• N44H material properties
• Magnetisation direction
• Pole configuration
• Operating temperature
• Magnetic circuit design
• Target steel composition
• Target steel thickness
• Available contact area
• Surface condition
• Air gaps
• Load direction
• Installation geometry

No specific pull force or magnetic flux density in Gauss has been supplied.

These values should not be estimated from the N44H designation or physical dimensions alone.

N44H Does Not Mean 44kg Pull Force

The N44H designation does not mean this magnet has a 44kg pull force.

N44H identifies the magnetic material grade and elevated-temperature classification.

Pull force is a separate performance measurement influenced by:

• Magnet dimensions
• Magnetisation direction
• Target material
• Target steel thickness
• Contact area
• Air gaps
• Surface condition
• Operating temperature
• Test configuration

Use a verified pull-force specification where holding capacity is important.

Direct Pull vs Shear Force

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

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 surface.

Shear performance can be influenced by:

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

Testing under realistic installation and temperature conditions is recommended where magnetic holding is critical.

Air Gaps and Magnetic Attraction

Air gaps can significantly reduce practical magnetic attraction.

Potential sources of separation include:

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

For maximum practical attraction, unnecessary separation between the magnet and target should generally be minimised.

Target Steel Thickness

Where this magnet operates against ferromagnetic steel, the target material forms part of the magnetic circuit.

Performance can be influenced by:

• Steel composition
• Steel thickness
• Target dimensions
• Available contact area
• Surface condition
• Magnetic saturation

Very 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 an N44H Neodymium Magnet

This magnet can be bonded into an appropriately designed housing or recess.

Before bonding:

• Confirm the required magnetic orientation
• Confirm polarity where multiple magnets are involved
• Clean both bonding surfaces
• Remove grease, dust and contamination
• Select an adhesive compatible with the magnet's actual surface finish
• Ensure the adhesive is suitable for the application's operating temperature
• Provide appropriate dimensional clearance
• Avoid force-fitting
• Allow the adhesive to cure according to its instructions

The specific coating or plating has not been supplied, so compatibility with the actual magnet surface should be confirmed.

For applications approaching 120°C, the adhesive, housing and other components must also be suitable for the intended operating temperature.

Avoid Force-Fitting

Neodymium Iron Boron is hard but brittle.

Do not force this magnet into an undersized recess or housing.

Excessive mechanical pressure can cause:

• Chipping
• Cracking
• Splitting
• Fracturing
• Damage to the protective surface finish

Provide appropriate dimensional clearance and use a suitable retention method.

Do Not Machine Neodymium Magnets

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

Avoid:

• Drilling
• Cutting
• Grinding
• Crushing
• Machining

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

If another dimension or geometry is required, select a magnet manufactured to the required specification.

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.

N44H vs Standard Neodymium Grades

The primary advantage of N44H is its combination of high magnetic energy and enhanced elevated-temperature capability.

Compared with many standard-temperature neodymium grades, N44H is designed to provide:

• Strong magnetic performance
• High magnetic energy density
• Better resistance to irreversible demagnetisation at elevated temperatures
• Suitability for higher-temperature magnetic assemblies

For this product, the specified maximum operating temperature is 120°C.

This can make it a useful option where standard neodymium magnets may not provide sufficient temperature capability.

Permanent Magnetic Operation

This N44H neodymium 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 operation.

Technical Specifications

• Product Name: Neodymium Disc Magnet – 23.6mm x 20mm | N44H | Max 120°C
• Product Type: High-Temperature Neodymium Disc Magnet
• Alternative Names: N44H Neodymium Disc Magnet, High-Temperature Rare Earth Magnet, NdFeB Round Magnet, High-Temperature Neodymium Magnet
• Diameter: 23.6mm
• Thickness / Height: 20mm
• Dimensions: 23.6mm diameter x 20mm thick
• Shape: Disc / Round
• Magnetic Material: Neodymium Iron Boron (NdFeB)
• Magnetic Grade: N44H
• Temperature Classification: H Grade
• Maximum Operating Temperature: 120°C
• Magnet Type: Rare Earth Permanent Magnet
• Magnetic Operation: Permanent
• Power Required: None
• Compatible Targets: Suitable ferromagnetic iron and steel
• Primary Functions: Magnetic attraction, holding, positioning, alignment, sensing, switching and product integration
• Typical Applications: Engineering, manufacturing, machinery, sensors, fixtures, industrial equipment, research, prototypes and OEM magnetic assemblies

Safety and Handling

This is a substantial neodymium magnet and should be handled carefully around other magnets and ferromagnetic objects.

Strong magnetic attraction can cause magnets or steel objects to accelerate together unexpectedly.

Potential hazards include:

• Pinched or trapped fingers
• Magnet collisions
• Chipping
• Cracking
• Fragmentation

Neodymium is hard but brittle despite its strong magnetic properties. Avoid uncontrolled collisions and excessive mechanical pressure.

Keep permanent magnets an appropriate distance from:

• Pacemakers and implanted medical devices
• Magnetic cards
• Magnetic storage media
• Magnetically sensitive instruments
• Sensitive electronic equipment

Keep magnets securely away from babies and children.

Please Note

This product is an N44H Neodymium Disc Magnet measuring 23.6mm in diameter x 20mm thick, manufactured from Neodymium Iron Boron (NdFeB) rare earth magnetic material and specified for a maximum operating temperature of 120°C.

The N44H designation identifies the magnetic material grade and elevated-temperature classification. It does not mean the magnet has a 44kg pull force.

The specified 120°C maximum operating temperature describes the product's stated temperature limit. Magnetic performance can still vary with temperature, magnetic circuit design, installation conditions and exposure duration.

No specific pull force, Gauss rating, coating or plating, magnetisation direction, pole configuration or dimensional tolerance has been supplied and these specifications should not be assumed.

Actual magnetic performance depends on the N44H material properties, operating temperature, 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 23.6mm diameter x 20mm thickness describes the physical geometry of the magnet and does 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.