What the motor is on the bench
The 1FK71055AF711UG3 is a Siemens synchronous servo motor from the 1FK7 family — a 3-phase brushless design rated 48 Nm continuous torque and 8.17 kW mechanical output at a rated speed of 3000 rpm, sized for high-inertia point-to-point motion where the velocity loop has to hold a stiff profile under load swings. As a synchronous servo it expects a sinusoidal-commutated drive with a position feedback channel (resolver or absolute encoder, per the variant suffix); pairing it with the matching SINAMICS drive closes the current loop at the motor and lets the controller command torque directly in Nm rather than inferring it from current.
Lifecycle stage — EOL/hot and what it means
For a buyer this shifts the sourcing question from catalogue to detective: the lot traceability, encoder variant in the suffix, and shaft/keyway revision have to be confirmed against the BOM before the part ships, because a half-turn difference in feedback resolution on a 1FK7 can turn a drop-in replacement into a commissioning weekend.
Sourcing posture for a hot-EOL servo
Quotations are built per RFQ against this order code: confirm current availability, warranty terms, and lead time at quote time, and request the manufacturer's Certificate of Origin if the build is shipping into a regulated line.