EF-EK electromagnetic brakes and clutches systems are using DC voltage to create magnetic field for transfere rotational energy. During the power off states, with the help of springs which are connected to armature, its easy to turn torque free state. EMAG brakes or clutches switching perion is dependable base on electronic circuit and also they are maintanence free. They can be adapt to different working applications with changing assembly structure of the system. As they are frictional systems, working gap is adjustable.