In this work, a study has been made of the influence of various types of high-coercivity permanent magnets on the key parameters (misalignment angle of half-clutches, power loss in current-conducting screen, screen temperature exceeding ambient temperature, liquid flow rate required to cool the screen with water, and forces of attraction between half-clutches) of a sealed equipment having an end magnetic clutch with retention of its basic parameter, namely, the value of the transferring torsional moment (torque). The overall dimensions of the magnetic clutch and half-clutches where various types of magnets are used remain unchanged.