INTORQ electromagnetic clutches and brakes transmit the drive torque or braking torque by friction in dry running conditions. When the DC voltage is applied, torque transmission is achieved free from torsional backlash. The prestressed annular spring on the armature assembly ensures release without residual torque on de-energisation. The clutches and brakes can be used in any mounting position and are virtually maintenance free. Depending on the friction energy used, the working air gap only needs to be checked (and corrected if necessary) at specific time intervals. Special machining of the friction surfaces ensures that the rated torques can be achieved after very few switching operations without a run-in period.