SIMOTICS S-1FK7 High Inertia motors have a higher rotor inertia than the compact version. With high load inertias, the increased rotor moment of inertia provides for a comfortable control response. The controller default settings are sufficient to ensure a good surface quality on the workpiece when the motor is employed on feed axes with high or variable load inertia. There is a choice of 13 types with 4 shaft heights with torques from 3 to 48 Nm and rated speeds up to 6000 rpm.