SmCo Countersunk Pot Magnet – 19mm Diameter x 8mm Height | M4 C/S

The SmCo Countersunk Pot Magnet – 19mm Diameter x 8mm Height | M4 C/S is a compact, high-performance Samarium Cobalt rare earth pot magnet designed for secure mechanical mounting and reliable magnetic holding in demanding industrial and engineering environments. Measuring 19mm in diameter x 8mm high, this magnetic assembly features an M4 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 reliable performance in elevated-temperature environments. The pot-style housing helps concentrate magnetic flux towards the working face, providing effective magnetic attraction when positioned against suitable ferromagnetic steel.

The combination of a compact 19mm x 8mm profile, M4 countersunk fixing and SmCo magnetic material makes this pot magnet suitable for machinery, sensors, fixtures, high-temperature equipment, precision engineering and custom magnetic assemblies.

Key Features

• High-performance Samarium Cobalt (SmCo) pot magnet
• 19mm diameter x 8mm height
• M4 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 housing 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
• Manufacturing fixtures
• Automotive equipment
• Aerospace components
• Machinery covers and panels
• OEM equipment
• Custom magnetic mounting systems

M4 Countersunk Hole for Secure Mounting

The integrated M4 countersunk hole provides a practical method for mechanically securing the pot magnet to a compatible substrate.

When installed with an appropriately sized countersunk fastener, the screw head sits within the recessed mounting area, helping maintain a compact installation.

Mechanical fastening is particularly useful where adhesive bonding is unsuitable, where operating conditions may affect adhesives or where a secure and repeatable magnetic mounting solution is required.

Care should be taken during installation to avoid excessive tightening.

Why Choose a Samarium Cobalt Magnet?

Samarium Cobalt magnets belong to the rare earth permanent magnet family and are particularly valued for applications requiring a combination of magnetic strength, thermal stability and resistance to demagnetisation.

Key characteristics of SmCo magnets include:

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

These characteristics make SmCo particularly useful for specialised applications where temperature stability and consistent magnetic performance are more important than simply achieving the highest possible magnetic strength.

Pot Magnet Construction

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

This configuration provides effective holding when the working face makes direct contact with suitable ferromagnetic steel.

The housing also provides additional mechanical protection around the magnetic material. However, Samarium Cobalt remains a hard and brittle material, so the complete assembly should still 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: M4 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 Samarium Cobalt magnetic material, 19mm diameter, 8mm height and M4 countersunk mounting makes this pot magnet suitable for specialised industrial applications where conventional magnetic materials may be less appropriate.

Potential uses include magnetic holding and mounting systems within:

• Industrial machinery
• High-temperature equipment
• Sensors
• Instrumentation
• Automotive systems
• Aerospace equipment
• Precision manufacturing fixtures
• Custom engineering assemblies

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

Getting the Best Magnetic Holding Performance

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

Magnetic performance can 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 installation.

Please Note

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

When installing through the M4 countersunk hole, use an appropriately sized fastener and avoid overtightening the screw.

Do not drill, cut or machine the magnetic assembly. Actual holding performance depends on the mating steel, contact area, surface condition, 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.