Reading the order code
The 1FK7043-7AK71-1FH3 sits inside the 1FK7 synchronous servo family — the higher-frame 1FK7043 shaft height slots into machine designs where the 1FK7042 frame runs out of torque margin, which is why the order-code suffix (frame length, brake option, encoder, shaft) matters more than the prefix for a replacement decision.
Where this motor was specified
Servo Motors from this class are the rotating element on a SINAMICS S120 / S210 axis module — the 1FK7043 frame handles packaging lines, converting machinery, and small-format machine-tool auxiliaries where the 1FK7042's lower continuous torque would force a thermal derate.