When a stamping press must start and stop without exposing operators to sudden torque spikes, a reliable switching device is essential. The contactor fits directly into the drive cabinet of presses, shears and bending machines, providing the main power break for the motor while its auxiliary contacts feed status signals to the programmable logic controller. During each cycle the controller energizes the contactor to engage the motor; when the part‑load sensor indicates the prescribed position, the auxiliary contacts open, cutting power and simultaneously informing the safety system that the machine is idle. This arrangement lets technicians integrate overload relays, emergency stop circuits, and interlock switches without adding separate wiring harnesses, simplifying the overall layout and reducing installation time. In CNC machining centers, the same device isolates spindle drives while its auxiliary contacts trigger coolant pumps and tool changers at precise moments, keeping the production line synchronized. By handling both the primary current path and the low‑level signaling, the contactor enables continuous operation of heavy‑duty equipment while meeting the stringent safety requirements of modern steel‑fabrication workshops.