Alnico Block Magnet – 75mm x 15mm x 10mm

The Alnico Block Magnet – 75mm x 15mm x 10mm is a rectangular permanent magnet measuring 75mm long x 15mm wide x 10mm thick. Manufactured from Alnico magnetic material, primarily composed of aluminium, nickel and cobalt with other elements depending on the specific alloy composition, this block magnet is suitable for engineering, manufacturing, instrumentation, sensing, machinery, laboratory 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 for applications where magnetic stability and temperature performance are important considerations.

Also known as an Alnico bar magnet, rectangular Alnico magnet, Alnico permanent magnet or Alnico block magnet, this 75mm x 15mm x 10mm magnet provides permanent magnetic operation without electricity, batteries or charging.

Key Features

• Length: 75mm
• Width: 15mm
• Thickness: 10mm
• Shape: Block / Rectangular / Bar
• Magnetic material: Alnico
• Primarily manufactured from aluminium, nickel and cobalt
• Permanent magnetic operation
• Excellent magnetic stability
• Suitable for elevated-temperature applications where compatible with the specific Alnico grade
• Good corrosion resistance in many environments
• Long 75mm rectangular profile
• Suitable for engineering and manufacturing
• Useful for sensors and instrumentation
• Suitable for scientific and educational applications
• Useful for research, prototypes and OEM products
• No electricity, batteries or charging required

Common Applications

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

75mm x 15mm x 10mm Rectangular Magnet

This Alnico block magnet measures 75mm long x 15mm wide x 10mm thick, providing an elongated rectangular profile.

Its bar-style geometry can make it useful for integration into:

• Mechanical assemblies
• Instrumentation
• Sensor systems
• Laboratory equipment
• Scientific apparatus
• Educational equipment
• Machinery
• Custom housings
• Prototype products

The 75mm length provides an elongated magnetic component compared with compact blocks or discs, making it suitable for applications designed around a rectangular or bar-shaped permanent magnet.

What Is an Alnico Magnet?

Alnico is a family of permanent magnetic alloys primarily containing:

• Aluminium
• Nickel
• Cobalt

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

Alnico has been widely used in industrial, scientific and engineering applications due to its combination of permanent magnetism, 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

One of the key characteristics of Alnico magnetic material is its excellent magnetic stability under appropriate operating conditions.

This can make Alnico suitable for applications where consistent magnetic behaviour is important, including:

• Measuring equipment
• Instrumentation
• Sensors
• Scientific apparatus
• Machinery
• Research equipment
• Long-term product assemblies

The performance of any finished magnetic system will also depend on the magnet geometry, magnetic circuit, magnetisation direction and surrounding materials.

Elevated-Temperature Applications

Alnico magnets are well known for their ability to operate in higher-temperature environments than many common permanent magnetic materials.

This characteristic can make Alnico useful for appropriately designed:

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

However, the specific maximum operating temperature has not been supplied for this 75mm x 15mm x 10mm magnet.

Maximum allowable temperature can vary according to the Alnico grade, magnetic circuit and application. A specific temperature limit should therefore not be assumed from the Alnico material classification alone.

Sensors and Instrumentation

Alnico block magnets can be incorporated into appropriately designed sensing and instrumentation systems.

Potential applications include:

• Position detection
• Magnetic switching
• Measurement equipment
• Instrumentation
• Scientific apparatus
• Mechanical indicators
• Research equipment

Where the position or direction of the magnetic field is important, the magnet's magnetisation direction and pole orientation should be confirmed before installation.

Engineering and Manufacturing

The elongated rectangular profile can make this Alnico magnet useful in custom engineering and manufacturing applications.

Potential uses include:

• Product assemblies
• Machinery
• Fixtures
• Magnetic positioning
• Custom equipment
• Mechanical systems
• Prototype devices
• OEM products

The final assembly should be designed around the physical and magnetic characteristics of the Alnico magnet rather than relying on dimensions alone to determine magnetic performance.

Educational and Scientific Applications

The familiar rectangular bar-style geometry can also make Alnico block magnets useful for appropriately supervised educational and scientific applications.

Potential demonstrations include:

• Magnetic attraction
• Magnetic poles
• Attraction and repulsion
• Magnetic field behaviour
• Ferromagnetic materials
• Permanent magnetism
• Magnetic circuits

Where pole location is important to a demonstration, confirm the magnetisation configuration before use.

Magnetisation Direction

Rectangular magnets can be magnetised in different directions.

Depending on manufacture, a block magnet may be magnetised:

• Through its thickness
• Through its width
• Along its length
• In another application-specific configuration

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

This specification is particularly important for:

• Sensor systems
• Magnet-to-magnet assemblies
• Magnetic circuits
• Position detection
• Scientific equipment

Confirm the required magnetic orientation before permanent installation.

Magnetic Performance

The practical magnetic performance of this Alnico block magnet depends on factors including:

• Alnico grade
• Magnetisation direction
• Magnet geometry
• Magnetic circuit
• 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 75mm x 15mm x 10mm dimensions alone.

Air Gaps and Magnetic Circuits

Air gaps can reduce the effective magnetic interaction between a permanent magnet and another magnetic or ferromagnetic component.

Potential gaps may be introduced by:

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

The design of the overall magnetic circuit can be particularly important when integrating Alnico magnets into engineered products.

Where magnetic performance is critical, the complete assembly should be tested under actual operating conditions.

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 be weakly magnetic or non-magnetic and should be tested before relying on magnetic attraction.

Alnico vs Neodymium Magnets

Alnico and neodymium magnets provide different advantages.

Alnico magnets are particularly valued for:

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

Neodymium magnets generally provide:

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

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

Alnico vs Ferrite Magnets

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

Alnico is commonly selected for:

• Elevated-temperature environments
• Instrumentation
• Sensors
• 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 magnet dimensions are acceptable

The appropriate magnetic material depends on the magnetic circuit, operating environment, available space and performance requirements.

Permanent Magnetic Operation

This Alnico block 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 Block Magnet
• Alternative Names: Alnico Bar Magnet, Rectangular Alnico Magnet, Alnico Permanent Magnet
• Length: 75mm
• Width: 15mm
• Thickness: 10mm
• Shape: Block / Rectangular / Bar
• 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, machinery, scientific equipment, 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
• Force-fitting into undersized housings
• Drilling
• Cutting
• Grinding
• Machining unless undertaken using an appropriate specialist manufacturing process

Magnets can also attract nearby ferromagnetic objects unexpectedly, creating potential pinch points.

Keep permanent 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 Block Magnet measuring 75mm long x 15mm wide x 10mm thick, 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 temperature and installation geometry.

The stated 75mm x 15mm x 10mm dimensions describe the physical size of the magnet and do not represent its pull force, holding capacity or safe working load.