SG Transmission permanent magnet (fail-safe) brakes incorporate the use of high specification Rare-Earth materials to ensure a positive stopping action in all types of rotating machinery.

These power-off devices are designed so that when the power is removed from the unit, for whatever reason, the magnetic energy of a permanent magnetic disc is channeled and controlled to attract the steel armature plate across an air-gap, thus clamping it in its place against the stationary field housing to give the required braking effect.