Siemens 1FK7081-2AC71-1QB0 SIMOTICS S 1FK7-CT Synchronous Servo Motor 12Nm 2000rpm

The Siemens 1FK7081-2AC71-1QB0 is a SIMOTICS S 1FK7-CT synchronous servo motor rated 12 Nm continuous torque (M0 at 100K) at 2,000 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

Same 12 Nm winding as the brake-less version of this shaft-height-80 frame, the highest continuous torque in this family comparison, but with an integrated holding brake for vertical or overhauling loads. The brake adds roughly 3 kg of mass and lowers shaft torsional stiffness to 76,000 Nm/rad against the brake-less version's 109,000 Nm/rad, so use it only where power-off holding is actually required.

Applications

Fits vertical-axis or gravity-loaded synchronous servo applications needing 12 Nm at 2,000 rpm, where the holding brake removes the need for a separate mechanical lock. The Drive-CLiQ encoder interface connects directly to Drive-CLiQ-enabled Siemens drive systems without separate encoder cabling.