SmCo Disc Magnet 6.35mm x 3.175mm

Samarium Cobalt (SmCo) Disc Magnet – 6.35mm x 3.175mm

The Samarium Cobalt (SmCo) Disc Magnet – 6.35mm x 3.175mm is a premium rare earth permanent magnet designed for applications that demand exceptional thermal stability, corrosion resistance, and long-term magnetic reliability. Measuring 6.35mm (¼ inch) in diameter and 3.175mm (⅛ inch) thick, this precision-manufactured disc magnet is ideal for use in high-temperature environments, precision instruments, aerospace systems, medical devices, industrial automation, and scientific equipment.

Manufactured from high-quality Samarium Cobalt (SmCo), this magnet delivers consistent magnetic performance across a much wider temperature range than conventional neodymium magnets. It also offers excellent resistance to corrosion, oxidation, moisture, and many chemicals, making it suitable for demanding environments where protective coatings may not be practical or where long service life is essential.

The magnet is axially magnetised, with the north and south poles located on the two flat circular faces. This configuration provides a concentrated magnetic field for secure holding, sensing, positioning, and precision engineering applications.

Whether you're designing compact electric motors, manufacturing specialised instruments, developing medical technology, or building equipment for harsh industrial environments, the 6.35mm x 3.175mm Samarium Cobalt Disc Magnet delivers dependable magnetic performance and outstanding durability.

Key Features

• Premium Samarium Cobalt (SmCo) rare earth magnet
• Dimensions: 6.35mm diameter x 3.175mm thick (¼" × ⅛")
• Excellent high-temperature performance
• Outstanding corrosion and oxidation resistance
• No protective coating required
• Axially magnetised for reliable face-to-face magnetic performance
• Stable magnetic performance across a wide temperature range
• Precision manufactured for consistent quality
• Long-lasting permanent magnet
• Ideal for demanding industrial and scientific applications

Common Applications

• Precision sensors
• Miniature electric motors
• Aerospace components
• Medical devices
• Scientific and laboratory equipment
• Magnetic couplings
• Industrial automation
• Position sensing systems
• Electronic assemblies
• Precision engineering projects

Ideal For

• Mechanical engineers
• Electronics manufacturers
• Aerospace engineers
• Medical device manufacturers
• Scientific researchers
• OEM equipment manufacturers
• Robotics developers
• Precision instrument manufacturers
• Universities and research laboratories
• Industrial maintenance professionals

Why Choose a 6.35mm x 3.175mm Samarium Cobalt Disc Magnet?

The 6.35mm x 3.175mm SmCo Disc Magnet is the ideal choice when temperature stability, corrosion resistance, and long-term magnetic reliability are critical. Unlike standard neodymium magnets, Samarium Cobalt magnets maintain their magnetic properties at significantly higher operating temperatures and are naturally resistant to corrosion, making them suitable for challenging industrial, marine, aerospace, and chemical environments.

Its compact size allows it to be incorporated into precision assemblies where space is limited, while its robust magnetic characteristics ensure dependable performance in applications such as miniature motors, sensors, instrumentation, and advanced engineering systems.

For designers and manufacturers seeking a reliable permanent magnet capable of performing in harsh operating conditions, Samarium Cobalt provides an excellent combination of strength, durability, and environmental resistance.

Technical Specifications

• Product Type: Disc Magnet
• Material: Samarium Cobalt (SmCo)
• Shape: Disc
• Diameter: 6.35mm
• Thickness: 3.175mm
• Equivalent Size: ¼ inch × ⅛ inch
• Magnetisation: Axial (through the thickness)
• 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

Samarium Cobalt magnets are hard and brittle and should be handled carefully to avoid chipping or cracking if dropped or allowed to snap together. They must not be drilled, machined, or subjected to excessive mechanical impact.

Although SmCo magnets offer excellent natural corrosion resistance and typically do not require a protective coating, they remain powerful permanent magnets and should be kept away from children due to the serious swallowing hazard posed by small magnets.

Keep magnets away from pacemakers, implanted medical devices, sensitive electronic equipment, and magnetic storage media. Actual holding force will vary depending on the thickness and quality of the steel surface, air gaps, mounting configuration, operating temperature, and surrounding materials. For optimum performance and service life, install the magnet in a way that minimises impact loading and excessive mechanical stress.