SmCo Disc Magnet 6mm x 2.5mm | Diametric Magnetised

Samarium Cobalt (SmCo) Disc Magnet – 6mm x 2.5mm | Diametrically Magnetised

The Samarium Cobalt (SmCo) Disc Magnet – 6mm x 2.5mm | Diametrically Magnetised is a precision-engineered rare earth permanent magnet designed for specialised applications requiring exceptional thermal stability, outstanding corrosion resistance, and a diametric magnetic orientation. Manufactured from premium Samarium Cobalt (SmCo) material, this compact disc magnet measures 6mm in diameter and 2.5mm thick, making it ideal for miniature motors, rotary sensors, encoders, magnetic couplings, instrumentation, and high-performance engineering applications.

Unlike standard disc magnets, which are typically axially magnetised through their thickness, this magnet is diametrically magnetised, meaning the north and south poles are located on opposite sides of the curved circumference. This unique magnetic orientation produces a radial magnetic field that is essential for applications involving rotation, angular position sensing, magnetic encoders, and precision mechanical assemblies.

Samarium Cobalt magnets are widely recognised for their ability to maintain consistent magnetic performance across a broad temperature range. They also offer excellent resistance to corrosion, oxidation, moisture, and many chemicals without requiring a protective coating, making them ideal for harsh environments where standard neodymium magnets may lose performance or corrode over time.

Whether you're developing compact electric motors, designing rotary sensing systems, manufacturing aerospace components, or building precision scientific equipment, the 6mm x 2.5mm Diametrically Magnetised SmCo Disc Magnet provides dependable magnetic performance and exceptional long-term reliability.

Key Features

• Premium Samarium Cobalt (SmCo) rare earth magnet
• Dimensions: 6mm diameter x 2.5mm thick
• Diametrically magnetised for radial magnetic fields
• Excellent high-temperature performance
• Outstanding corrosion and oxidation resistance
• No protective coating required
• Stable magnetic performance over a wide operating temperature range
• Precision manufactured for consistent quality
• Long-lasting permanent magnet
• Ideal for rotary and sensing applications

Common Applications

• Rotary position sensors
• Magnetic encoders
• Miniature electric motors
• Brushless DC (BLDC) motors
• Magnetic couplings
• Precision instrumentation
• Aerospace components
• Medical devices
• Scientific equipment
• Industrial automation systems

Ideal For

• Design engineers
• Electronics manufacturers
• Motor manufacturers
• Aerospace engineers
• Medical device designers
• Scientific researchers
• OEM manufacturers
• Robotics developers
• Precision engineering workshops
• Universities and research laboratories

Why Choose a Diametrically Magnetised SmCo Disc Magnet?

The 6mm x 2.5mm Diametrically Magnetised SmCo Disc Magnet is specifically designed for applications where the magnetic field must radiate from the sides of the magnet rather than through its flat faces. This makes it ideal for rotating assemblies, angular position detection, magnetic sensing, and miniature motor designs where conventional axial magnetisation is unsuitable.

Compared with standard neodymium magnets, Samarium Cobalt magnets offer superior resistance to high temperatures, corrosion, and chemical exposure, making them the preferred choice for demanding industrial, aerospace, marine, and scientific environments. Their exceptional magnetic stability ensures reliable, repeatable performance even under challenging operating conditions.

Technical Specifications

• Product Type: Disc Magnet
• Material: Samarium Cobalt (SmCo)
• Shape: Disc
• Diameter: 6mm
• Thickness: 2.5mm
• Magnetisation: Diametric (north and south poles on opposite sides of the diameter)
• Coating: Uncoated (SmCo material naturally resists corrosion)
• Magnet Type: Permanent Rare Earth Magnet
• Temperature Resistance: Suitable for elevated temperature applications compared with standard neodymium magnets

Please Note

This magnet is diametrically magnetised, meaning the magnetic poles are positioned on opposite sides of the curved outer diameter rather than on the flat faces. This specialised magnetisation is intended for rotary, sensing, and precision engineering applications and may not be suitable for standard face-to-face holding applications.

Samarium Cobalt magnets are hard and brittle and should be handled carefully to prevent chipping or cracking. Do not drill, machine, or subject the magnet to heavy impact, as this may cause permanent damage.

Although SmCo magnets offer exceptional corrosion resistance and generally do not require protective plating, they remain powerful permanent magnets and should be kept away from children due to the serious swallowing hazard posed by small magnets. Keep away from pacemakers, implanted medical devices, sensitive electronic equipment, and magnetic storage media. Actual magnetic performance will vary depending on mounting configuration, surrounding materials, air gaps, operating temperature, and the specific application.