Siemens 1FK7080-2AF71-1QB0 SIMOTICS S 1FK7-CT Synchronous Servo Motor 8Nm 3000rpm

The Siemens 1FK7080-2AF71-1QB0 is a SIMOTICS S 1FK7-CT synchronous servo motor rated 8 Nm continuous torque (M0 at 100K) at 3,000 rpm, with 4.4 A rated current and a shaft height of 80 mm. It uses natural cooling, carries IP64 protection, and includes a Drive-CLiQ single-turn absolute encoder (20-bit), with a holding brake.

Technical Specifications

Selection Notes

Moving to the shaft-height-80 frame lowers continuous torque to 8 Nm versus the 11-12 Nm shaft-63 windings, but the larger frame gives a stiffer 81,000 Nm/rad shaft and a higher 92.0% efficiency, which suits higher-inertia loads that need a stiffer mechanical coupling at the same 3,000 rpm base speed. The integrated holding brake retains axis position once drive power is removed.

Applications

Fits synchronous servo axes needing 8 Nm at 3,000 rpm with higher load inertia than the shaft-63 frame handles well, in machine tool and handling applications where the holding brake secures the axis when de-energized. The Drive-CLiQ encoder interface connects directly to Drive-CLiQ-enabled Siemens drive systems without separate encoder cabling.