Siemens 1FK7032-2AF21-1QA0 SIMOTICS S 1FK7-CT Synchronous Servo Motor 0.31 kW 1.2 Nm 3000 rpm IP64

The Siemens 1FK7032-2AF21-1QA0 is a SIMOTICS S 1FK7-CT synchronous servo motor rated at 0.31 kW and 1.2 Nm standstill torque (at 100 K temperature rise), with a 3,000 rpm optimum speed and a 20-bit single-turn absolute encoder with DRIVE-CLiQ interface (AS20DQI). Natural cooling, IP64 protection, IMB5/IMV1/IMV3 flange mounting, rotatable power connector, and a feather-key shaft without holding brake make this a compact, directly mountable servo axis for space-constrained machine designs.

Selection Notes

The 1FK7032-2AF21-1QA0 sits at the low-torque end of the 1FK7-CT frame family: 1.2 Nm standstill torque and a 0.650 kgcm² rotor inertia are well matched to lightweight, fast-cycling axes — pick-and-place arms, conveyor indexing heads, or label applicators — where load inertia is similarly low and the 2.20 ms mechanical time constant enables tight velocity-loop bandwidths. The 20-bit DRIVE-CLiQ single-turn encoder eliminates a separate encoder cable and integrates directly with SINAMICS S120 and S210 drives via the DRIVE-CLiQ topology, but absolute position is lost across power cycles, so applications requiring homing-free restart after E-stop should step up to the multi-turn (MT) encoder variant. The absence of a holding brake keeps weight at 2.7 kg and simplifies installation on horizontal axes; vertical or gravity-loaded axes require either an external brake or the brake-equipped sibling. IP64 seals against dust ingress and splash water — adequate for most machine-tool periphery and packaging environments, but not for direct coolant spray (IP67 variants exist in the broader 1FK7 family).

Applications

Compact servo axes on SINAMICS S120 or S210 drive systems are the primary target. The 0.31 kW rating and 36 mm shaft height suit OEM machine builders embedding multiple servo axes in confined enclosures: rotary indexing tables, small-format CNC auxiliary axes, textile machinery thread-tension control, and electronic cam synchronisation where the low moment of inertia allows rapid speed reversals without overshooting position windows.