Samarium Cobalt Magnets

11 products

Showing 1 - 11 of 11 products

Samarium cobalt magnets (SmCo) are rare earth magnets composed of samarium (Sm) and cobalt (Co), typically produced in grades ranging from 18 to 32. They are valued for their ability to operate at elevated temperatures (180 °C and above) while maintaining magnetic strength under opposing fields.

With exceptional temperature stability, corrosion resistance, and long-term reliability, SmCo magnets perform in environments where other materials degrade. Common applications include medical devices, high-temperature motors, and harsh industrial systems.

SuperMagnetMan supplies SmCo magnets in a wide range of shapes, sizes, and grades to meet precise performance requirements. Explore the categories below to quickly source magnets for prototyping, testing, or production builds.

Samarium cobalt magnets (SmCo) deliver exceptional stability at high temperatures (180 °C+) and resist demagnetization in demanding conditions. With excellent corrosion resistance and long-term reliability, they are ideal for medical devices, high-temperature motors, and industrial environments.

Explore the categories below to quickly find the right fit for prototyping, testing, or production.

Popular Samarium Cobalt Magnets

Disc Magnets — versatile and durable for high-performance designs

Ring Magnets — excellent for motors, sensors, and magnetic couplings

Rectangle Magnets — reliable strength for assemblies and prototypes

Showing 1 - 11 of 11 products

SmCo D0315

$3.00

In stock, 804 units

0.315" (8mm) dia x 0.118" (3mm) thick SmCo26 Disc Magnet - Nickel plated Minimum Order Quantity (MOQ) = 5 pc

SuperMagnetMan Samarium Cobalt Disc Magnet. Great as high temperature magnets. Used as aerospace magnets, military magnets, sensor magnets, consumer electronics magnets. These disc magnets are strong rare earth SmCo magnets also used as automotive magnets.

SmCo D0725

$6.75

In stock, 45 units

0.750" (19.05mm) dia x 0.250" (6.35mm) thick SmCo30 Disc Magnet - unplated Minimum Order Quantity (MOQ) = 2 pc

SmCo D0750

$11.50

In stock, 397 units

0.750" (19.05mm) dia x 0.500" (12.70mm) thick SmCo30 Disc Magnet - Nickel plated Minimum Order Quantity (MOQ) = 1 pc

SuperMagnetMan Samarium Cobalt Ring Magnet. Great as high temperature magnets. Used as aerospace magnets, military magnets, motor magnets, sensor magnets, consumer electronics magnets. These ring magnets are strong rare earth SmCo magnets also used as automotive magnets. www.supermagnetman.com

SmCo R0750

$5.95

In stock, 63 units

0.750" (19.05mm) OD x 0.375" (9.53mm) ID 0.250" (6.35mm) thick SmCo26 Ring Magnet - Nickel plated. Minimum Order Quantity (MOQ) = 2 pc

SmCo R1060

$9.95

In stock, 93 units

1" (25.40mm) OD x 0.625" (15.88mm) ID 0.250" (6.35mm) thick SmCo18 Ring Magnet - unplated Minimum Order Quantity (MOQ) = 1 pc

SmCo R0750UN

$5.95

In stock, 226 units

0.750" (19.05mm) OD x 0.375" (9.53mm) ID 0.250" (6.35mm) thick SmCo26 Ring Magnet - Unplated Minimum Order Quantity (MOQ) = 2 pcs

SmCo Rect0280Ni

$15.50

Only 1 unit left

1.102" (28mm) long x 0.709" (18mm) wide 0.512" (13mm) thick SmCo24H Rectangle Magnet - Nickel plated Minimum Order Quantity (MOQ) = 1 pc

SmCo Rect0285Cr

$21.90

In stock, 3 units

1.102" (28mm) long x 0.709" (18mm) wide 0.945" (24mm) thick SmCo24H Rectangle Magnet - Chrome plated Minimum Order Quantity (MOQ) = 1 pc

SmCo Rect0285Ni

$21.50

Sold out

1.102" (28mm) long x 0.709" (18mm) wide 0.945" (24mm) thick SmCo24H Rectangle Magnet - Nickel plated Minimum Order Quantity (MOQ) = 1 pc

SmCo Rect0600Cr

$27.90

In stock, 3 units

2.362" (60mm) long x 0.709" (18mm) wide 0.512" (13mm) thick SmCo24H Rectangle Magnet - Chrome plated Minimum Order Quantity (MOQ) = 1 pc

SmCo Rect0600Ni

$27.40

In stock, 6 units

2.362" (60mm) long x 0.709" (18mm) wide 0.512" (13mm) thick SmCo24H - Rectangle Magnet - Nickel plated Minimum Order Quantity (MOQ) = 1 pc

Frequently Asked Questions

What are samarium cobalt magnets used for?

Samarium cobalt magnets are ideal for applications requiring high magnetic strength and temperature resistance, such as aerospace, motors, and medical devices.

What are the different magnet grades of samarium cobalt?

SuperMagnetMan carries four samarium cobalt (SmCo) grades: SmCo18, SmCo26, SmCo30, and SmCo24H. These grades vary in magnetic strength and temperature resistance—SmCo18 and SmCo26 provide excellent stability for high-temperature environments, SmCo30 offers higher magnetic performance, and SmCo24H is engineered for applications requiring both strong magnetism and superior heat resistance.

How do samarium cobalt magnets compare to neodymium magnets?

Samarium cobalt (SmCo) magnets offer lower maximum strength than neodymium magnets, but they provide much better temperature stability and corrosion resistance. Neodymium magnets are the strongest rare earth magnets available, ideal when maximum magnetic power is required. SmCo magnets, on the other hand, are preferred for high-temperature or harsh environments where neodymium may lose strength or require protective coatings.

Are SmCo magnets available in discs and rectangles for testing? 

Yes, SmCo magnets are stocked in multiple shapes and sizes, including discs, rectangles and ring magnets, so you can test under harsh conditions before moving to full production.

Can you produce custom sizes, magnetization direction or coatings?

Yes. Through our engineering division, SM Magnetics, we can design and manufacture custom sizes, magnetization directions, and specialized coatings. You can either submit a custom request form or contact us directly to speak with our experts.