3.0 Nm / 0.82 kW compact servo, flagged for end of life
The 1FK7042-5AF21-1...: The 1FK7042-5AF21-1 is a SIMOTICS S 1FK7 Compact synchronous servo motor — 3.0 Nm continuous, 0.82 kW, rated to 3000 rpm on a 300 V DC link, naturally cooled with an IM B5 flange footprint (IM V1 and IM V3 also covered), and a power/signal plug rotatable through 270° for cable-routing flexibility on retrofit spindles and indexing axes. Match the inertia first when sizing this frame on a pick-and-place or small rotary table — 3.0 Nm continuous at 3000 rpm means decent torque headroom for short accel ramps, but the rotor inertia ratio (load vs rotor) is what decides whether the velocity loop stays quiet or sings at a notch you cannot filter out without giving up bandwidth.
Lifecycle read: eol_hot on the record
For buyers still running 1FK7042 axes on SINAMICS S110/S120 or SIMATIC-based motion controllers, that eol_hot flag means last-time-buy discipline at the panel-builder level and a clear second-source gate before any new machine design locks the BOM to this SKU.
Sourcing posture for an EOL servo
Buyers searching for an exact replacement should treat the 1FK7042-5AF21-1 as a legacy spare, confirm the IM B5 shaft height and resolver/encoder type against the existing machine plate before placing the order, and route through procurement with a specific part number rather than a parametric guess — the connector rotatable through 270° comes in variants that are not always drop-in across the same catalog row.