SmCo Discs with Central Holes

An Introduction to SmCo Discs with Central Holes

Samarium Cobalt, SmCo, is the alternative Rare Earth magnet to Neodymium.

SmCo has better temperature coefficients than Neodymium allowing less variation in magnetic output over temperature fluctuations. SmCo outperforms Neodymium at temperatures above +150°C (with an upper limit of +350°C) and can be used at temperatures nearly as low as absolute zero (-273°C).

SmCo is a great choice for applications where high temperatures exist and where high external demagnetising forces exist, such as in motors and generators.

Where Alnico cannot be used, SmCo is also a superb choice for temperature sensitive applications such as sensors where a stable magnetic field is required. It is used in aerospace, automotive and military applications.

SmCo offers excellent corrosion resistance to water due to little free iron being present in its structure. However, SmCo is a brittle material and could break, chip, snap or possibly even shatter if mishandled. Care should be taken when using SmCo (e.g. wear safety glasses).

The SmCo magnets can be made to have straight through holes or countersunk holes. These ring magnets have higher permeance coefficients compared to disc magnets are the same outer dimensions. The magnetic pole on the countersunk face is stated because, when applying the rule of unlike Poles attract, a South countersunk face magnet will attract only to a North countersunk faced magnet (although any countersunk ring magnet can be used to attract to mild steel).

If you cannot find the dimensions you require, please get in touch. The standard manufacturing tolerance is +/- 0.1mm on all dimensions.

How to buy SmCo Discs with Central Holes

Buy SmCo Discs with Central Holes

Part No.	Size	Grade	Pull (kg)
EP301ASM	10mm dia x 5mmA x 3.2mm dia c/sunk Hole NORTH	SmCo26	1.30Kg
EP301BSM	10mm dia x 5mmA x 3.2mm dia c/sunk Hole SOUTH	SmCo26	1.30Kg
EP338ASM	15mm dia x 2mmA x 3mm dia c/sunk Hole NORTH	SmCo26	1.80Kg
EP338BSM	15mm dia x 2mmA x 3mm dia c/sunk Hole SOUTH	SmCo26	1.80Kg
EP314SM	20mm dia x 10mmA x 6mm dia c/sunk Hole NORTH	SmCo26	5.00Kg
EP315SM	20mm dia x 10mmA x 6mm dia c/sunk Hole SOUTH	SmCo26	5.00Kg

Buy SmCo Discs with Central Holes