Siemens 1FK7083-2AC71-1QB0 SIMOTICS S 1FK7-CT 2.6 kW 16 Nm Holding Brake Servo Motor

The Siemens 1FK7083-2AC71-1QB0 is a SIMOTICS S 1FK7-CT synchronous servo motor rated 2.6 kW with 16 Nm standstill torque at 100K and a 2,000 rpm rated speed, built with an integrated holding brake. It runs on a 600 V DC link, uses natural cooling, and carries an IP64 enclosure with an absolute 20-bit single-turn DRIVE-CLiQ encoder (AS20DQI).

Technical Specifications

Selection Notes

The holding brake raises rotor inertia from the brakeless winding's 26.000 kgcm² to 29.500 kgcm² and lowers shaft torsional stiffness from 101,000 to 72,000 Nm/rad, so allow for reduced servo-loop bandwidth versus the non-brake motor. Use it on vertical or gravity-loaded 16 Nm axes where the 2,000 rpm winding must hold position without drive power. Rated current, power, and speed match the non-brake variant, so drive sizing is unchanged.

Applications

Typical use: vertical or overhung axes on machine tools and material-handling stations where load must not drop when power is removed.