Siemens 1FK7103-5AF71-1PB0 Synchronous Servo Motor

Siemens SIMOTICS S-1FK7 synchronous servo motor, model 1FK7103-5AF71-1PB0, is a compact, naturally cooled servo designed for high‑precision motion control in automation applications. This 4.40 kW class motor delivers roughly 36 Nm of torque in typical operating points and is built for reliable closed‑loop operation when paired with Siemens servo drives, enabling smooth acceleration and repeatable positioning in demanding cycles. It features a shaft end with a fitted feather key, a power/signal connector that can rotate up to 270 degrees for flexible installation, and a resolver‑based encoder interface compatible with Drive‑CLiQ wiring. The unit belongs to the IM B5 mounting family (suitable for variants in V1 or V3 configurations) and is designed to integrate seamlessly with standard Siemens automation ecosystems, making it a common choice for CNC machines, robotics, packaging lines, and automated assembly where precise torque control and accuracy are essential. For exact electrical specifications, mechanical dimensions, and enclosure details, consult the official Siemens datasheet for 1FK7103-5AF71-1PB0.