KUKA 1FK7101-Y71-1SY3-Z – High-Torque AC Servo Motor | 1FK7 Series Platform
Engineering Background
The KUKA 1FK7101-Y71-1SY3-Z (internal reference: S77 00-179-161) is a precision AC synchronous servo motor engineered for demanding motion control applications in industrial robotics and CNC automation. Manufactured in Germany to Siemens SIMOTICS S / KUKA OEM specifications, this unit belongs to the proven 1FK7 Compact series — a platform trusted by system integrators worldwide for its high power density, low cogging torque, and seamless integration with SINAMICS and KRC drive systems.
Product Positioning
Designed for procurement engineers sourcing replacement or expansion servo axes in KUKA robot cells, CNC machining centers, and automated assembly lines. This motor delivers consistent dynamic response across the full speed range, making it the preferred choice for high-cycle, precision-positioning environments where downtime is not an option.
Complete Technical Specifications
| Part Number | 1FK7101-Y71-1SY3-Z |
| Internal Reference | S77 00-179-161 |
| Series / Platform | KUKA / Siemens 1FK7 Compact |
| Motor Type | AC Synchronous Servo Motor (Permanent Magnet) |
| Rated Power | ~4.0 kW (axis-dependent; confirm via nameplate) |
| Rated Speed | 3000 rpm |
| Rated Torque | ~13 Nm |
| Peak Torque | ~39 Nm |
| Encoder Type | Absolute Multiturn Encoder (DRIVE-CLiQ compatible) |
| Shaft Configuration | Smooth shaft with key (Y71 option) |
| Brake Option | Integrated holding brake (1SY3 option) |
| Protection Rating | IP64 (standard); IP65 shaft seal |
| Insulation Class | Class F (155°C) |
| Cooling Method | Natural convection (self-cooled) |
| Weight | ~6.0 kg |
| Country of Origin | Germany (DE) |
| HS Code | 8501.52.0000 |
| Compatible Drives | SINAMICS S120, KRC4, KRC5 servo drives |
Proven Application Environments
- KUKA Robot Cells – Direct OEM replacement for KR AGILUS, KR QUANTEC, and KR CYBERTECH series joint axes
- CNC Machining Centers – Feed axis and spindle orientation drives requiring high dynamic stiffness
- Automated Assembly Lines – High-cycle pick-and-place, press-fit, and torque-controlled fastening stations
- Semiconductor & Electronics Manufacturing – Ultra-smooth motion profiles for wafer handling and PCB placement
- Packaging Machinery – Servo-driven cam profiles and synchronized multi-axis gantries
- Injection Molding – Clamp, injection, and ejector axis servo replacement
Engineering Advantages
- High Power Density – Compact 1FK7 frame delivers maximum torque-to-volume ratio, minimizing machine footprint
- DRIVE-CLiQ Interface – Single-cable encoder connection eliminates wiring complexity and enables automatic motor identification
- Integrated Holding Brake – 1SY3 brake option ensures safe axis retention on power loss without external brake modules
- Low Cogging Torque – Optimized magnet geometry ensures smooth velocity control at low speeds, critical for precision contouring
- Absolute Multiturn Encoder – Eliminates homing cycles after power-up, reducing machine cycle time
- Robust IP64 Sealing – Suitable for coolant mist, swarf, and light wash-down environments
System Architecture & Signal Flow
The 1FK7101-Y71-1SY3-Z integrates into a SINAMICS S120 or KUKA KRC drive topology as follows:
- Power Feed: DC bus from Active Line Module (ALM) → Motor Module (MM) → Motor power terminals (U, V, W)
- Encoder Feedback: DRIVE-CLiQ cable from motor encoder → Control Unit (CU320-2) or KRC servo board
- Brake Control: 24 VDC holding brake signal from Motor Module brake output → motor brake connector
- Safety Integration: STO (Safe Torque Off) via PROFIsafe or onboard safety terminals on the drive
- Commissioning: Motor data auto-detected via DRIVE-CLiQ; manual parameter set p0300/p0301 if required
Sourcing & Quality Verification
- OEM Traceability: Each unit ships with original KUKA/Siemens nameplate; serial number verifiable against manufacturer records
- Inspection Protocol: Pre-shipment electrical test (winding resistance, insulation resistance ≥ 100 MΩ @ 500 VDC, encoder communication check)
- Condition: New OEM stock or fully refurbished to OEM specification (stated per order confirmation)
- Packaging: Anti-static foam insert, moisture-barrier bag, original or equivalent export carton
- Documentation: Certificate of conformity, test report, and packing list included
Procurement Process
- Submit RFQ via [email protected] or WhatsApp +0086 19859288691 with your required quantity and delivery timeline
- Receive formal quotation with lead time, unit price, and shipping options within 24 business hours
- Confirm purchase order; payment via T/T, PayPal, or platform checkout
- Pre-shipment inspection report issued; unit dispatched via DHL / FedEx / sea freight per your preference
- Post-delivery technical support available for commissioning and parameter configuration
Technical FAQ
Q: Is this motor compatible with SINAMICS S120 without additional configuration?
A: Yes. The DRIVE-CLiQ interface enables automatic motor data upload (p0300 = 1). No manual parameter entry required for standard configurations.
Q: Can this motor replace a failed axis on a KUKA KR AGILUS robot?
A: Yes, provided the axis number and mechanical interface match. Confirm shaft diameter, flange size (B5/B14), and brake voltage (24 VDC) against your robot’s BOM before ordering.
Q: What is the holding brake release voltage?
A: 24 VDC nominal. The brake is spring-applied / electrically released (fail-safe design).
Q: Do you provide a warranty?
A: Yes. 12-month warranty against manufacturing defects. Warranty claims processed within 5 business days upon receipt of failed unit.
Q: Can you supply the matching DRIVE-CLiQ encoder cable?
A: Yes. Specify cable length and connector type (straight/angled) in your RFQ.
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