Permanent magnet clutches consist of opposing discs equipped with very strong rare earth magnets. The torque, which then acts on one of the discs, is automatically transferred to the other disc over the gap.
Torque transmission via flat vessel walls or similar is thus easily possible. Due to the simple, flat construction, an angular error of up to 3° and a parallel offset of up to 6 mm can be accepted. Nearly the entire torque is then still transferred.