Definition and line position
The 1FK7043-4CK74-1SA0 is a Siemens 1FK7 high-dynamic synchronous servo motor in the SIMOTICS S family of compact, high-inertia brushless servos used where a machine axis demands rapid acceleration and deceleration profiles rather than steady-state torque at minimum size. As a brushless synchronous servo, it is paired with a SINAMICS-class drive and feedback device, mounted through its flange to the machine frame or gearbox, and specified into motion axes where the 1FK7's inertia class and torque density are the deciding fit factors — packaging lines, converting machinery, indexing tables, and similar short-cycle automation.
Lifecycle status and supply posture
The part carries a of eol_hot, which signals the Siemens EOL/phase-out regime — production is winding down, last-time-buy windows are open or closed depending on variant, and the only honest supply channels are quoted-to-order through authorised distribution or verified independent surplus. For a buyer who has this exact order code on a live BOM, that means pricing and available quantity are quote-driven, lead time is confirmed per order, and any new-unit shipment is traceable back to a Siemens manufacturing lot rather than brokered unknown origin.