Sizing a 4 Nm high-dynamic axis with this motor
The 1FK70447AH711UG0: The 1FK7044-7AH71-1UG0 is a SIMOTICS S 1FK7 high-dynamic synchronous servomotor rated 4.0 Nm continuous torque, with a natural-cooling 1.41 kW figure and 4500 RPM nominal speed, making it a short-cycle, high-acceleration axis drive rather than a continuous-duty powerhouse. Its 0.18 Nm / 0.05 kW low-speed end is paired with a 6000 RPM upper capability, so the same frame covers a wide speed envelope — useful when one machine design has both indexing and rotary-table duties but rarely hits both extremes on the same axis.
Feedback, connector, and shaft details that drive the BOM
Feedback is a multi-pole resolver (resolver P=3) brought out through a Drive-CLiQ interface, which means this motor drops directly onto a SINAMICS S120 or SIMOTION controller without an external encoder module — the resolver and DRIVE-CLiQ connector together carry position and temperature to the drive in one cable. The power and signal connectors rotate by 270°, so the cable exit can be clocked to match the cabinet routing after the motor is bolted down — a small spec that saves panel rework when the gearbox stack forces an awkward angle. Shaft is plain (no keyway) with tolerance N, and there is no holding brake specified on this build — meaning the axis relies on the drive's regenerative stop or a downstream mechanical brake for vertical-load safety. If the BOM line was sized around a brake-equipped sibling, this is the swap point that has to be re-evaluated. The motor carries IP64 protection, which seals against splashed water and dust ingress but does not reach washdown rating — IP64 is fine for cabinet-mounted or sheltered machine interiors, not for food-grade or outdoor conveyor duty.