Siemens 1FK7101-5AZ91-1ZZ9-Z Servo Motor – Obsolete 1FK7 Spare Part

Technical Dossier

Product Details And Specifications

Siemens 1FK7101-5AZ91-1ZZ9-Z Servo Motor – Obsolete 1FK7 Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Electrical parameters such as rated torque, rated speed, and voltage class are confirmed against physical unit and documentation at time of order. No parameters are published speculatively.

Solving the Discontinued Hardware Crisis

The Siemens 1FK7 compact servo series was engineered for high-dynamic positioning in confined machine envelopes. It became the standard axis motor across a generation of KUKA articulated robots, Siemens-controlled transfer lines, and precision grinding machines. Siemens has since migrated its servo portfolio toward the 1FK7 High Inertia and 1FT7 families, leaving facilities that standardized on the original 1FK7 compact frame without a factory-supported replacement path.

Maintaining a physical spare of the original 1FK7101-5AZ91-1ZZ9-Z eliminates that path entirely. Swap time is measured in hours, not weeks. No drive parameters change. No safety re-validation is triggered. The line returns to production on the same shift.

How to extend automation asset life by 5–10 years through targeted spare parts strategy:

Condition & Reliability Assurance

Every 1FK7101-5AZ91-1ZZ9-Z unit processed by DriveKNMS passes a structured 5-step inspection protocol before it is offered for sale:

1. Electrolytic Capacitor Assessment: Internal capacitors in the motor's integrated encoder electronics are inspected for bulging, leakage, and ESR drift. Units showing capacitor aging are rejected or recapped with matched-specification components before re-evaluation.
2. Firmware and Encoder Version Verification: The encoder module firmware version is read and documented. Compatibility with the target drive system (SINAMICS S120 or SIMODRIVE 611) is confirmed before dispatch.
3. Pin and Connector Corrosion Inspection: Power and feedback connector pins are inspected under magnification for oxidation, fretting corrosion, and mechanical deformation. Affected pins are cleaned or the connector assembly is replaced.
4. Winding Insulation Test: Insulation resistance between each phase winding and motor frame is measured. Units below the minimum threshold for the rated voltage class are not offered for sale.
5. Mechanical Inspection: Shaft runout, bearing play, and flange surface condition are checked. The holding brake (where fitted) is actuated and release-tested under load.

Key Features for System Maintenance

Q: Can you source other 1FK7 variants or related KUKA spare parts?
A: Yes. DriveKNMS specializes in obsolete and hard-to-find industrial automation components across Siemens, KUKA, ABB, Fanuc, and other major brands. Submit your full parts list for a consolidated quotation.