Robotic Joint Drive Solution – KUKA 1FK7103-5AF81-1SH3-Z | 1FK7 Series AC Servo Motor
The KUKA 1FK7103-5AF81-1SH3-Z is a high-performance AC servo motor from the Siemens 1FK7 Series, factory-integrated into KUKA robotic systems. Engineered for precision torque delivery and dynamic response, this motor powers the primary joint axes of KUKA industrial robots across automotive, electronics, and heavy manufacturing environments. When uptime is measured in seconds and positional accuracy in micrometers, engineers specify this model by name.
Where This Product Is Used
- KUKA Robot Joint Axes (A1–A6): Primary drive motor for articulated arm joints in KR AGILUS, KR QUANTEC, and KR CYBERTECH series robots.
- Automotive Body-in-White (BIW) Lines: Spot welding, seam sealing, and press-tending cells requiring high-cycle repeatability.
- Electronics Assembly: PCB handling, component placement, and precision dispensing with sub-millimeter path accuracy.
- Palletizing & Material Handling: High-inertia load management in end-of-line packaging and logistics automation.
- CNC Machine Tool Integration: Feed axis and spindle orientation drives in machining centers paired with SINUMERIK controllers.
- Collaborative & Hybrid Cells: Human-robot collaboration (HRC) stations where smooth torque ripple is critical for safety compliance.
Technical Specifications
- Part Number: 1FK7103-5AF81-1SH3-Z
- Series: Siemens 1FK7 (KUKA OEM variant)
- Motor Type: Permanent Magnet AC Synchronous Servo Motor
- Rated Speed: 3,000 rpm (nominal)
- Rated Torque: ~18 Nm (continuous)
- Peak Torque: ~54 Nm
- Encoder: Absolute multiturn encoder (SH3 suffix)
- Shaft: Smooth shaft with Z-option (customer-specific feature)
- Cooling: Natural convection (self-cooled)
- Protection Rating: IP64
- Insulation Class: F
- Compatible Drive: Siemens SINAMICS S120 / KUKA KSD servo drive
- Weight: ~8.5 kg (approx.)
- Mounting Flange: IM B5 / IEC 72
Why Engineers Specify This Model
- OEM-Grade Precision: Factory-matched to KUKA robot kinematics — no recalibration required on direct replacement.
- Absolute Multiturn Encoder (SH3): Retains position data through power cycles, eliminating homing routines on restart.
- High Torque Density: Compact frame delivers 18 Nm continuous in a space-efficient package, critical for robot arm weight budgets.
- Plug-and-Play with SINAMICS S120: Pre-parameterized DRIVE-CLiQ compatibility reduces commissioning time significantly.
- Proven Field Reliability: Widely deployed across Tier-1 automotive plants with documented MTBF exceeding 40,000 hours.
Complete System Bill of Materials
- KUKA 1FK7103-5AF81-1SH3-Z — AC Servo Motor (this item)
- Siemens SINAMICS S120 Motor Module — Matched servo drive unit
- DRIVE-CLiQ Cable — Encoder/communication cable to drive
- Power Cable — Motor power connection (application-specific length)
- KUKA KRC4 / KRC5 Controller — Robot system controller
- Shaft Coupling or Gearbox — Application-dependent mechanical interface
- Brake Resistor — For dynamic braking in vertical axis applications
Compliance & Industry Standards
- CE Marked — EU Machinery Directive 2006/42/EC compliant
- UL Listed — North American electrical safety certification
- IEC 60034 — Rotating electrical machines standard
- ISO 9283 — Robot performance and accuracy testing
- RoHS Compliant — Restriction of hazardous substances
- REACH Compliant — EU chemical regulation conformity
Quality Assurance & Sourcing
Konmask.com sources the 1FK7103-5AF81-1SH3-Z exclusively from verified industrial supply channels including authorized KUKA/Siemens distributors and certified surplus dealers. Every unit undergoes:
- Visual and mechanical inspection upon receipt
- Encoder signal verification and shaft runout check
- Insulation resistance (Megger) test
- Serialization and traceability documentation
- Anti-static, moisture-barrier packaging for safe transit
New, refurbished, and tested-used grades are available. Grade is clearly stated on every order confirmation.
How to Source This Part
- Add to Cart: In-stock units ship within 1–3 business days from our warehouse.
- Request a Quote: Email [email protected] for volume pricing, lead time, or specific condition requirements.
- Urgent Requirement: Call or WhatsApp +0086 19859288691 for same-day response on critical downtime situations.
- Cross-Reference Needed: Provide your existing motor nameplate data and we will confirm compatibility before shipment.
Application-Specific FAQ
Q: Is this motor a direct drop-in replacement for a failed KUKA robot joint motor?
A: Yes, for robots using the 1FK7103-5AF81-1SH3-Z as the OEM motor. Verify the robot model and axis number against the KUKA spare parts list before ordering.
Q: Does the absolute encoder retain position after power loss?
A: Yes. The SH3 multiturn absolute encoder retains position data without battery backup, eliminating the need for re-homing after an E-stop or power failure.
Q: Can this motor be used outside of KUKA robots, e.g., in a custom CNC machine?
A: Yes, with a compatible Siemens SINAMICS S120 drive and proper DRIVE-CLiQ parameterization. Contact us for commissioning guidance.
Q: What is the lead time for out-of-stock units?
A: Typically 2–6 weeks depending on source availability. Contact us to join the waitlist or explore equivalent alternatives.
Q: Do you provide a warranty?
A: Yes. New units carry a 12-month warranty. Refurbished units carry a 6-month warranty. All claims are handled directly by Konmask.com.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: [email protected] | +0086 19859288691
