Alnico Rod Magnet – 8mm x 24mm

The Alnico Rod Magnet – 8mm x 24mm is a cylindrical permanent magnet measuring 8mm in diameter x 24mm long. Manufactured from Alnico magnetic material, primarily composed of aluminium, nickel and cobalt with other elements depending on the specific alloy composition, this compact rod magnet is suitable for engineering, manufacturing, instrumentation, sensors, scientific equipment, education, research, prototypes and custom OEM applications.

Alnico magnets are particularly valued for their excellent magnetic stability and ability to perform in elevated-temperature environments. They also provide good corrosion resistance in many operating conditions, making Alnico a useful permanent magnetic material where temperature capability, dimensional form and stable magnetic behaviour are important design considerations.

Also known as an Alnico cylinder magnet, cylindrical Alnico magnet, Alnico bar magnet or Alnico permanent magnet, this 8mm x 24mm rod provides permanent magnetic operation without electricity, batteries or charging.

Key Features

• Diameter: 8mm
• Length: 24mm
• Shape: Rod / Cylinder
• Magnetic material: Alnico
• Primarily manufactured from aluminium, nickel and cobalt
• Length is three times the diameter
• Compact cylindrical profile
• Excellent magnetic stability
• Suitable for elevated-temperature environments where compatible with the specific Alnico grade
• Good corrosion resistance in many environments
• Suitable for engineering and manufacturing
• Useful for sensors and instrumentation
• Suitable for scientific and laboratory equipment
• Useful for educational demonstrations
• Suitable for research, prototypes and OEM assemblies
• Permanent magnetic operation
• No electricity, batteries or charging required

Common Applications

• Engineering
• Manufacturing
• Industrial equipment
• Sensors and instrumentation
• Position detection
• Magnetic switching
• Scientific equipment
• Laboratory applications
• Measuring equipment
• Machinery
• Educational demonstrations
• Product assemblies
• Research and development
• Prototype devices
• Custom magnetic assemblies
• OEM products

8mm Diameter x 24mm Long Rod Magnet

This Alnico rod magnet measures 8mm in diameter x 24mm long, creating a slender cylindrical magnetic component with a length three times its diameter.

The compact rod-style geometry can make it suitable for integration into:

• Cylindrical housings
• Round recesses
• Tubular assemblies
• Sensor systems
• Instrumentation
• Scientific apparatus
• Mechanical assemblies
• Custom manufactured components

Where the magnet is installed into a housing, provide appropriate dimensional clearance rather than attempting to force-fit the magnetic material.

What Is an Alnico Magnet?

Alnico refers to a family of permanent magnetic alloys primarily containing:

• Aluminium
• Nickel
• Cobalt

Other elements may also be incorporated depending on the specific Alnico composition and manufacturing process.

Alnico magnets have a long history of use in industrial, engineering, scientific and sensing applications due to their combination of permanent magnetism, excellent magnetic stability and elevated-temperature capability.

The specific Alnico grade and complete alloy composition have not been supplied for this product and should not be assumed.

Excellent Magnetic Stability

Alnico is particularly recognised for its stable magnetic characteristics under appropriate operating conditions.

This can make Alnico rod magnets useful in applications such as:

• Measuring equipment
• Instrumentation
• Sensors
• Scientific apparatus
• Machinery
• Laboratory equipment
• Research devices

Practical magnetic performance will also depend on the specific Alnico grade, magnet geometry, magnetisation direction and overall magnetic circuit.

Elevated-Temperature Applications

Alnico magnetic materials are widely recognised for their ability to perform in higher-temperature environments than many common permanent magnet materials.

This characteristic can make Alnico useful for appropriately designed:

• Industrial machinery
• Manufacturing equipment
• Sensors
• Instrumentation
• Scientific apparatus
• Measurement systems
• Heating-related equipment

However, the specific maximum operating temperature has not been supplied for this 8mm x 24mm Alnico rod magnet.

Temperature capability varies according to the specific Alnico grade, magnetic circuit and operating conditions. A maximum temperature should therefore not be assumed from the Alnico material family alone.

Sensors and Instrumentation

The compact cylindrical profile of this Alnico rod magnet can be useful for integration into appropriately designed sensor and instrumentation systems.

Potential applications include:

• Position detection
• Magnetic switching
• Measurement equipment
• Mechanical indicators
• Scientific instruments
• Laboratory apparatus
• Industrial sensing
• Research equipment

Where the magnetic field direction is important to the operation of a sensor, confirm the magnetisation direction before installation.

Cylindrical Housings and Recesses

The 8mm diameter profile can simplify integration into appropriately sized cylindrical housings and bores.

Potential installations include:

• Machined housings
• Sensor bodies
• Tubular assemblies
• Mechanical components
• Scientific instruments
• Custom fixtures
• Prototype equipment

The magnet should not be machined or forced into an incorrectly sized housing. Instead, the surrounding component should be designed with appropriate dimensional clearance.

Magnetisation Direction

Rod and cylinder magnets can be manufactured with different magnetisation configurations.

Depending on manufacture, a cylindrical magnet may be magnetised:

• Axially along its 24mm length
• Diametrically across its 8mm diameter
• In another application-specific configuration

The magnetisation direction and pole orientation have not been supplied for this Alnico rod magnet and should not be assumed from its cylindrical geometry.

Confirm this specification where field orientation is important, including:

• Sensors
• Magnetic switches
• Magnet-to-magnet assemblies
• Magnetic circuits
• Position detection
• Scientific equipment

Magnetic Performance

Practical magnetic performance depends on factors including:

• Alnico grade
• Magnetisation direction
• Magnet geometry
• Magnetic circuit design
• Target steel composition
• Target steel thickness
• Available contact area
• Air gaps
• Surface condition
• Operating temperature
• Installation geometry

No specific pull force or magnetic flux density in Gauss has been supplied and these values should not be inferred from the 8mm x 24mm dimensions alone.

Magnetic Circuit Design

The surrounding magnetic circuit can significantly influence the performance of an Alnico magnet.

Important factors may include:

• Magnet geometry
• Pole configuration
• Surrounding ferromagnetic material
• Air gaps
• Position within the assembly
• External magnetic fields
• Mechanical design

Where magnetic performance is critical, evaluate the complete assembly under realistic operating conditions rather than considering the magnet in isolation.

Air Gaps

Magnetic interaction generally decreases as the distance between magnetic components increases.

Air gaps may be introduced by:

• Mechanical clearance
• Adhesive
• Paint
• Plastic
• Protective layers
• Dirt
• Uneven surfaces

Where strong magnetic interaction is required, unnecessary air gaps should generally be minimised.

In sensor applications, the required operating gap should instead be determined according to the sensor and magnetic circuit design.

Compatible Target Materials

Alnico 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.

Alnico vs Neodymium Rod Magnets

Alnico and neodymium magnets provide different performance characteristics.

Alnico rod magnets are particularly valued for:

• Excellent magnetic stability
• Elevated-temperature capability
• Good corrosion resistance in many environments
• Suitability for sensors and instrumentation
• Long-established use in industrial and scientific equipment

Neodymium rod magnets generally provide:

• Greater magnetic performance relative to size
• Strong magnetic properties from compact dimensions
• Advantages where maximum magnetic strength is required within restricted space

Alnico can therefore be particularly useful where temperature capability and magnetic stability are more important than achieving maximum magnetic strength from the smallest possible magnet.

Alnico vs Ferrite Magnets

Alnico and ferrite are both established permanent magnetic materials but offer different characteristics.

Alnico is commonly selected for:

• Elevated-temperature environments
• Sensors and instrumentation
• Scientific equipment
• Applications requiring good magnetic stability

Ferrite is commonly selected for:

• Economical general-purpose magnetism
• Good natural corrosion resistance
• High-volume applications
• Applications where larger physical dimensions are acceptable

The most appropriate material depends on the required magnetic properties, operating environment, geometry and overall magnetic circuit.

Permanent Magnetic Operation

This Alnico rod 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: Alnico Rod Magnet
• Alternative Names: Alnico Cylinder Magnet, Cylindrical Alnico Magnet, Alnico Bar Magnet, Alnico Permanent Magnet
• Diameter: 8mm
• Length: 24mm
• Shape: Rod / Cylinder
• Magnetic Material: Alnico
• Primary Alloy Components: Aluminium, Nickel and Cobalt
• Magnet Type: Permanent Magnet
• Magnetic Operation: Permanent
• Power Required: None
• Target Materials: Compatible ferromagnetic iron and steel
• Primary Functions: Magnetic attraction, sensing, positioning and product integration
• Typical Applications: Engineering, manufacturing, instrumentation, sensors, scientific equipment, laboratories, education, research, prototypes and OEM products

Safety and Handling

Alnico magnets should be handled carefully and protected from unnecessary mechanical impact.

Avoid:

• Dropping the magnet onto hard surfaces
• Allowing magnets to collide uncontrollably
• Applying excessive impact or mechanical force
• Force-fitting into undersized housings
• Drilling
• Cutting
• Grinding
• Machining unless undertaken using an appropriate specialist manufacturing process

Permanent magnets can attract nearby ferromagnetic objects unexpectedly and may create pinch points.

Keep magnets an appropriate distance from:

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

Keep magnets securely away from babies and young children.

Please Note

This product is an Alnico Rod Magnet measuring 8mm in diameter x 24mm long, manufactured from Alnico permanent magnetic material.

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

While Alnico magnetic materials are recognised for excellent magnetic stability and elevated-temperature capability, the allowable operating temperature of this specific magnet should be confirmed before use in a high-temperature application.

Actual magnetic performance depends on the Alnico grade, magnetisation direction, magnetic circuit, target material, air gaps, operating conditions and installation geometry.

The stated 8mm diameter x 24mm length describes the physical size of the magnet and does not represent its pull force, holding capacity or safe working load.