What the part number says about the unit
The 1FK7022-5AK71-1VB3 is a Siemens 1FK7 compact synchronous servo motor in the SIMOTICS S family footprint — a brushless servomotor sized for tight machine integration where the shaft output and feedback stack drive a SINAMICS S120 drive or comparable controller.
What a sourcing desk needs to confirm before commit
For a controls integrator, the load-bearing question on this code is the exact encoder variant and shaft detail baked into the -1VB3 suffix — Siemens packs shaft, brake, and feedback options into the order code string, and a mismatch on any of them with the existing cabinet wiring and drive parameter set is what usually costs a commissioning day. For a small-shop owner matching a dead spindle, the practical move is to quote the full MPN against the BOM and have the replacement checked against the existing drive's motor parameter list before energising — the 1FK7 compact line is field-tunable on most SINAMICS platforms, but only if the encoder and winding code are recognised by the drive firmware.