Where this 1FK7 lands in the cabinet
The 1FK7040-5AK71-1...: The 1FK7040-5AK71-1 is a Siemens SIMOTICS S 1FK7 Compact synchronous servo — 1.6 Nm continuous, 6000 rpm ceiling, 0.69 kW shaft rating, naturally cooled with an IM B5 flange (IM V1 / IM V3 alternative mounting) and a power/signal connector that rotates 270° for harness routing in tight cabinets. At 100 K winding class and a compact short-stack frame, this slot typically drives a small positioning axis — feed-roll, cross-seal, indexing table, or a light conveyor section on a packaging or converting line — driven from a SINAMICS S120 or similar modular drive set.
Lifecycle read: spare-part stock, not a new build
The ordering code carries eol_hot — meaning Siemens has moved the 1FK7040-5AK71-1 out of normal catalog stocking, with remaining material released as spare-part inventory rather than as a current-production configuration. Quotations are lot-specific — quantities, condition (new-surplus vs refurb), and traceability are confirmed at RFQ time against current independent-channel stock.
Fit envelope a buyer has to clear
The shaft envelope — 1.6 Nm holding torque class and 6000 rpm speed ceiling — sets the mechanical sizing: this is not the motor for a high-inertia roll or a heavy spindle, but it is the right class for a light-servo axis where compact frame length and clean dynamic response matter more than absolute torque density. The rotatable power/signal plug is the practical install point: the same motor can be rotated in its mounting to keep the cable exit on the cable-tray side of the cabinet, which matters when the drive is in a back-plane cut-out with limited vertical clearance above the motor.