earth3Rochester Magnet offers Samarium Cobalt magnets in blocks, discs, and rings. Samarium Cobalt is an alternative to Neodymium-lron-Boron (NdFeB), as SmCo magnets can withstand much higher temperatures and are more corrosion resistant than NdFeB. Samarium Cobalt is more costly than NdFeB due to the market price sensitivity of Cobalt. These magnets are brittle and can be prone to chipping or cracking. SmCo is used in computer disk drives, sensors, traveling wave tubes, linear actuators, satellite systems and some motors.

Sintered Samarium Cobalt rare earth magnets are extremely resistant to demagnetization and they can operate at temperatures up to 500F (260C). There are many Samarium Cobalt grades which can withstand higher temperatures, but several factors will dictate the overall performance of the Samarium Cobalt rare earth magnet. One of the most pertinent variables is the geometry of the magnet or magnetic circuit. Samarium Cobalt magnets which are relatively thin compared to their pole cross-section (Magnetic Length / Pole Area) will demagnetize easier than Samarium Cobalt magnets which are thick. Magnetic geometries utilizing backing plates, yokes, or return path structures will respond better to increased temperatures.

Rochester Magnet stocks some standard sizes which are available for immediate shipment. Additionally, we can help you select the right magnet based on your specific application and have custom magnets produced with normal production leadtimes. We are also able to supply solutions based on your specific engineered drawing. Please Contact Us with your specifications and application requirements.

Common Applications: Satellite Systems - Linear Actuators - Computer Disc Drives - Sensors - Motors (where temporary stability is vital).

  Oriented through the thickness
RMC PN Size (Dia. x Thickness) Grade
RMSC102 0.156" x 0.060" 18
RMSC103 0.156" x 0.077" 18
RMSC104 0.187" x 0.060" 18
RMSC107 0.250" x 0.125" 18
RMSC108 0.250" x 0.250" 18
RMSC109 0.375" x 0.125" 18
RMSC110 0.375" x 0.060" 18
RMSC111 0.375" x 0.250" 18
RMSC113 0.475" x 0.440" 18
RMSC112 0.500" x 0.060" 18
RMSC114 0.500" x 0.187" 18
RMSC115 0.625" x 0.060" 24
Oriented through the thickness
All dimensions approximate
Tolerances: ± .020 dia., ± 0.005 thickness

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