When a robot axis stops unexpectedly, finding the correct replacement motor can become the main maintenance challenge. Industrial servo systems depend on precise motor specifications, encoder compatibility, mechanical fit, and drive matching. The KUKA 1FK7034-5AZ91-1ZZ9-Z addresses these requirements as a compact permanent-magnet synchronous servo motor based on the Siemens 1FK7 series. With 0.57 kW rated power, 1.2 Nm rated torque, and 4,200 rpm rated speed, it suits dynamic robot axes and compact automation equipment. If you need a specific replacement rather than a generic motor, DUOMI can help you verify the part number, condition, and technical configuration before quotation.
The KUKA 1FK7034-5AZ91-1ZZ9-Z combines a compact 1FK7034 frame with permanent-magnet synchronous motor technology. Its performance makes it suitable for applications where you need controlled acceleration, accurate positioning, and repeatable motion.
The motor provides:
These specifications support high-dynamic movements such as robot positioning, pick-and-place operations, and contouring tasks.
Although the motor is configured for KUKA applications, its base design belongs to the Siemens 1FK7 family. It can therefore be relevant when you are sourcing a Siemens 1FK7 servo motor or a KUKA-compatible replacement for an existing automation system.
However, you should not select a replacement by power rating alone. Before ordering, verify the complete part number, encoder configuration, E-stand, shaft design, brake specification, and drive compatibility.
| Specification | KUKA 1FK7034-5AZ91-1ZZ9-Z | Typical Generic Servo Motor |
|---|---|---|
| Motor type | Permanent-magnet synchronous | AC servo |
| Rated power | 0.5–0.57 kW | Application dependent |
| Rated torque | 1.2 Nm | Application dependent |
| Rated speed | 4,200 rpm | Application dependent |
| Maximum torque | Up to 6.4 Nm | Varies |
| Holding brake | 1.1 Nm | Configuration dependent |
| Shaft | Involute/splined | Often keyed |
| DC bus | 560 V DC | Varies |
| Typical use | KUKA robot axes, compact automation | General automation |
This comparison shows why an exact part-number replacement can be more practical than replacing a failed motor with a motor that only has similar power.
When sourcing the KUKA 1FK7034-5AZ91-1ZZ9-Z servo motor, use this verification process:
DUOMI CNC specializes in supplying new and discontinued automation spare parts to customers in more than 100 countries. Its portfolio covers servo motors, servo drives, PLC modules, HMIs, encoders, circuit boards, teach pendants, and other industrial automation components.
For replacement sourcing, DUOMI provides several practical advantages:
DUOMI also supplies automation components from Siemens, KUKA, FANUC, ABB, Yaskawa, Allen-Bradley, Mitsubishi, Danfoss, SEW-Eurodrive, Schneider, B&R, SICK, and other major brands.
1. Is the KUKA 1FK7034-5AZ91-1ZZ9-Z a Siemens 1FK7 motor?
Yes. The model is based on the Siemens 1FK7 compact permanent-magnet synchronous servo motor family and is configured for KUKA applications.
2. What should you check before replacing this KUKA servo motor?
Check the complete part number, encoder type, E-stand, shaft configuration, brake, mounting dimensions, and compatibility with your servo drive.
3. Can DUOMI supply a replacement for a discontinued KUKA or Siemens motor?
Yes. DUOMI specializes in new and discontinued automation spare parts and can help you check part availability, condition, specifications, warranty, and shipping options.
The KUKA 1FK7034-5AZ91-1ZZ9-Z combines 0.57 kW power, 1.2 Nm rated torque, 4,200 rpm speed, and compact 1FK7 construction, making it a practical option for KUKA robot axes and other dynamic automation applications. When maintaining industrial servo systems, matching the complete motor configuration is essential for reliable replacement and commissioning. DUOMI can help you verify the required Siemens or KUKA part number and source the appropriate automation spare with technical and global shipping support.
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