What this motor is and where it lands on the machine
The Siemens 1FK70447AF711FB3 is a 3-phase synchronous servo motor out of the 1FK7 line, rated 4 Nm continuous, 1.1 kW, and 3000 rpm — the compact, high-dynamic class that pairs with a SINAMICS S120 drive on a positioning axis or a small feed spindle.
Reading the 4 Nm / 1.1 kW / 3000 rpm trio
The 4 Nm figure is the continuous stall-region torque; combined with the 3000 rpm ceiling, it lands 1.1 kW as the steady mechanical output — a sizing point sized for mid-range dynamic axes where the part runs well below its thermal limit under cyclic load and reserves headroom for acceleration peaks.
Lifecycle: EOL hot, not EOL cold
The listed is eol_hot — the part is in the active phase-out window, meaning Siemens is winding down new production while the motor remains supported for service and spare-parts coverage for existing installed bases; stock still moves through authorized and independent channels in the meantime.