SmCo Countersunk Pot Magnet – 19mm Diameter x 8mm Height | M3 C/S

The SmCo Countersunk Pot Magnet – 19mm Diameter x 8mm Height | M3 C/S is a compact Samarium Cobalt rare earth pot magnet designed for secure mechanical mounting and reliable magnetic holding in demanding applications. Measuring 19mm in diameter x 8mm high, this magnetic assembly features an M3 countersunk mounting hole for installation with a compatible countersunk screw.

Manufactured using Samarium Cobalt (SmCo) magnetic material, this pot magnet offers excellent magnetic stability, strong resistance to demagnetisation and good performance in elevated-temperature environments. The surrounding pot housing helps concentrate magnetic flux towards the working face, making the magnet suitable for industrial equipment, fixtures, sensors, machinery, high-temperature assemblies and precision engineering applications.

The compact 19mm x 8mm dimensions make this SmCo pot magnet particularly useful where installation space is limited but a mechanically secured magnetic attachment point is required.

Key Features

• High-performance Samarium Cobalt (SmCo) pot magnet
• 19mm diameter x 8mm height
• M3 countersunk mounting hole
• Designed for secure mechanical screw fixing
• Rare earth permanent magnetic material
• Excellent magnetic stability
• Strong resistance to demagnetisation
• Suitable for elevated-temperature applications
• Pot construction helps concentrate magnetic flux at the working face
• Compact design for space-restricted installations
• Suitable for demanding industrial and engineering applications

Common Applications

• High-temperature magnetic assemblies
• Industrial machinery
• Sensors and instrumentation
• Precision engineering
• Automotive equipment
• Aerospace components
• Manufacturing fixtures
• Machinery covers and panels
• OEM equipment
• Custom magnetic mounting systems

M3 Countersunk Hole for Secure Mounting

The integrated M3 countersunk hole provides a convenient method for mechanically fastening the pot magnet to a suitable substrate.

When installed with an appropriately sized countersunk screw, the fastener head can sit neatly within the recessed mounting hole, helping maintain a compact and professional installation.

Mechanical mounting can be particularly useful where adhesive bonding is unsuitable, where elevated temperatures may affect adhesives, or where a secure and repeatable installation is required.

Care should be taken during installation to avoid excessive tightening.

Why Choose a Samarium Cobalt Pot Magnet?

Samarium Cobalt magnets are part of the rare earth permanent magnet family and are particularly valued for their combination of magnetic performance and environmental stability.

SmCo magnets offer several useful characteristics, including:

• Excellent performance at elevated temperatures
• High resistance to irreversible demagnetisation
• Good natural corrosion resistance
• Excellent long-term magnetic stability
• Strong rare earth magnetic performance

These properties make SmCo a useful alternative to neodymium in applications where temperature stability and resistance to demanding operating conditions are important.

Pot Magnet Construction

The pot-style construction incorporates the SmCo magnetic material into a surrounding housing that helps direct the magnetic field towards the working face.

This concentrated magnetic circuit provides effective holding when the magnet makes direct contact with a suitable ferromagnetic steel surface.

The pot housing can also provide additional mechanical protection around the magnetic material, although Samarium Cobalt itself remains a hard and brittle material and should be handled carefully.

Technical Specifications

• Product Type: SmCo Countersunk Pot Magnet
• Alternative Names: Samarium Cobalt Pot Magnet, Countersunk SmCo Magnet, High-Temperature Pot Magnet
• Magnetic Material: Samarium Cobalt (SmCo)
• Magnet Type: Rare Earth Permanent Magnet / Pot Magnet
• Shape: Round
• Diameter: 19mm
• Height: 8mm
• Mounting: M3 Countersunk Hole
• Primary Function: Magnetic holding, fixing and mounting
• Typical Applications: High-temperature equipment, machinery, sensors, fixtures and precision assemblies

High-Temperature and Industrial Applications

The combination of SmCo magnetic material, compact 19mm diameter and M3 countersunk mounting makes this pot magnet well suited to specialised engineering environments.

Potential applications include magnetic mounting and holding systems within:

• Industrial machinery
• High-temperature equipment
• Sensors
• Instrumentation
• Motors and electronic assemblies
• Automotive systems
• Aerospace equipment
• Precision manufacturing fixtures

Where operating temperature is a critical requirement, always refer to the confirmed temperature rating for the specific SmCo grade and complete pot magnet assembly, as the maximum operating temperature can depend on more than the magnetic material alone.

Getting the Best Magnetic Holding Performance

For maximum magnetic performance, the working face should make direct, flat contact with clean and sufficiently thick ferromagnetic steel.

Holding performance may be reduced by:

• Thin steel
• Paint and protective coatings
• Air gaps
• Rust or surface contamination
• Curved or uneven surfaces
• Limited contact area
• Sideways or shear loading
• Peeling forces

Where a pull-force rating is specified separately, it generally represents controlled direct-pull testing under ideal conditions and should not automatically be treated as the safe working load for every application.

Please Note

Samarium Cobalt magnets are hard and brittle. They may chip, crack or fracture if dropped, struck or subjected to excessive mechanical pressure.

When installing through the M3 countersunk hole, use a compatible fastener and avoid overtightening the screw.

Do not drill, cut or machine the magnetic assembly. Actual magnetic holding performance depends on the mating steel, surface condition, contact area, air gaps and direction of applied force.

This product should not be used as certified lifting equipment, an overhead suspension point or a safety-critical holding device unless the complete installation has been appropriately engineered and tested.

Keep strong magnets away from children, pacemakers, medical implants, magnetic storage media and sensitive electronic equipment.