KUKA 1FK7103-5AF81-1YY3-Z S17 SERVO MOTOR T269153

The 1FK7103-5AF81-1YY3-Z S17 is a high-torque synchronous servo motor developed as a collaboration between Siemens and KUKA. While based on the Siemens 1FK7 Compact series, the "S17" suffix indicates it is a KUKA-exclusive mechanical build, designed to fit the specific gearboxes and mounting flanges of KUKA KR Series robotic arms. It is a critical "line-stopper" part—when a robot axis fails, this motor is usually the primary replacement suspect.