Despite the technological advancement achieved in the automation field, the Esa servomotor with permanent magnets still remains a practical solution for the most varied application requirements. The Esa servomotor is reliable and durable, with a high overload capacity and notably linear rotation even at low speed. A commutator with a high number of blades and a built-in tacho generator allow repeated and precise speed variations to be made even at high torque values. Various sizes — with torque ratings ranging from 0.32Nm to15Nm— created through advanced mechanical design procedures achieve optimum dimensional/performance ratios.