Catalog line — what this part physically is
The Siemens 1FK7042-5AK71-1.V. is the SIMOTICS S 1FK7 Compact family geared servo motor: a 1.02 kW naturally cooled synchronous servo with an integrated holding brake and a power/signal connector plug rotatable by 270°, intended for direct gearbox mounting as a spare part (cites:,). Because the geared version is supplied with the gearbox already mounted, replacement on a line is a shaft-and-coupling swap rather than a re-engineered assembly — the connector orientation is set by the 270° rotatable plug before the unit is energised (cites:).
Lifecycle status — eol_hot and the stocking read
For an installed 1FK7 Compact geared drive, eol_hot in practice means the critical spares list — at minimum one running motor, ideally two — should be treated as finite stock rather than a replenishable line item; min/max levels are set by the consumption rate of identical units on the plant floor, not by the catalog price (cites:,).