SmCo Disc Magnets

An Introduction to SmCo Disc Magnets

Samarium Cobalt (SmCo) is the other Rare Earth magnet!

SmCo is the alternative to Neodymium magnets when a more stable output over a much wider temperature range is required.

The SmCo magnets can be used from temperatures nearly as low as absolute zero (-273°C) up to +350°C. Although Neodymium magnets provide stronger fields at room temperature, SmCo starts to outperform at temperatures above +150°C.

With superior temperature coefficients than Neodymium, magnetic output from SmCo varies less over a change in temperature, making it an ideal choice for temperature sensitive applications such as sensors and loudspeakers where stability of the field during operation is important.

SmCo also has a very good intrinsic coercivity allowing it to be used in applications where high external demagnetising forces (and high temperatures) may be present, such as the starting of an electric motor.
SmCo has very little free iron in its structure meaning it offers excellent corrosion resistance to water. It very rarely requires protective coating (e.g. a nickel coating to allow soldering to a printed circuit board). Because of its performance characteristics SmCo is often used instead of Neodymium in mission critical applications such as aerospace and military applications.

SmCo is a brittle material and could break, chip, snap or possibly even shatter if mishandled. Care should be taken when assembling with the SmCo (e.g. wear safety glasses).

Standard manufacturing tolerance is +/- 0.1mm on all dimensions.

If you cannot find the dimensions you require, please get in touch.

How to buy SmCo Disc Magnets

Buy SmCo Disc Magnets

Part No.	Size	Grade	Pull (kg)
EP305SM	1mm dia x 1mmA	SmCo26	0.04Kg
EP303SM	2mm dia x 1mmA	SmCo26	0.07Kg
EP400SM	3mm dia x 1mmA	SmCo26	0.11Kg
EP100SM	4mm dia x 5mmA	SmCo26	0.76Kg
EP306SM	6mm dia x 1mmA	SmCo26	0.23Kg
EP643SM	6mm dia x 3mmA	SmCo26	0.69Kg
EP644SM	6mm dia x 6mmA	SmCo26	1.37Kg
EP323SM	8mm dia x 2mmA	SmCo26	0.61Kg
EP307SM	10mm dia x 1mmA	SmCo26	0.38Kg
EP403SM	10mm dia x 2mmA	SmCo26	0.76Kg
EP645SM	10mm dia x 5mmA	SmCo26	1.91Kg
EP348SM	10mm dia x 10mmA	SmCo26	3.82Kg
EP656SM	12mm dia x 3mmA	SmCo26	1.37Kg
EP406SM	20mm dia x 3mmA	SmCo26	2.29Kg

Buy SmCo Disc Magnets