Samarium Cobalt Disc Magnets

Samarium Cobalt (SmCo) disc magnets are powerful magnets rare earth magnets composed of samarium and cobalt. They are commonly used in high performance motors, magnetic couplings and magnetic separators. These are brittle magnets and are prone to cracking and chipping. Samarium magnets can be used for high temperature applications where neodymium will not work.


  • Samarium cobalt magnets are hard and brittle and may chip or break if dropped.
  • They have high magnetic properties.
  • Samarium cobalt magnets offer good thermal stability.
  • Samarium cobalt magnets are resistant to corrosion.
  • Samarium cobalt magnets resistant to demagnetization.

Gluing SmCo Magnets

Several factors must be considered to assure the effective performance of the magnet, the adhesive and the resulting bond. These include the chemical and physical properties of the magnets and the surfaces to which they are affixed. Detailed coverage of all these factors, along with some adhesives to try, is covered in our white paper Gluing Magnets.


Dimensions are listed in inches. Items list below are supplied magnetized through the thickness. Additional sizes, magnetization methods, and grade choices are available upon request and may be on hand from stock. 

Contact us at 800-763-4795 if you don’t see what you’re looking for in this brief listing.

Item# Diameter Thickness Grade
55B0009 0.118 0.118 18
55B0001 0.187 0.060 18
55B0018 0.250 0.100 24
55B0035 0.250 0.250 26
55B0038 0.312 0.200 20
55B0040 0.375 0.200 20
55B0019 0.500 0.190 18
55B0031 0.625 0.180 18
55B0025 0.750 0.180 26
55B0063 1.500 0.500 26

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