KUKA 1FK7 Series Servo Motors C26D00-100-782KCP2 00-179-1614.9KW 1FK7101-5AY71-1SY3-Z S77

Technical Dossier

Product Details And Specifications

KUKA 1FK7 Series Technical Notes

The KUKA 1FK7 series permanent-magnet synchronous servo motors are a core motion-control component deployed across global heavy industry verticals, including petrochemical processing plants, nuclear facility auxiliary systems, offshore drilling platforms, and automotive body-in-white assembly lines. Manufactured to Siemens SIMOTICS S standards and integrated into KUKA robotic and CNC drive architectures, the 1FK7 range covers shaft heights from 36 mm to 100 mm, with continuous stall torques from 0.4 Nm to 48 Nm and rated speeds from 1500 rpm to 6000 rpm. The series is fully compatible with SINAMICS S120, SIMODRIVE 611, and MASTERDRIVES MC drive platforms, making it a long-lifecycle component in both greenfield installations and brownfield retrofit projects. The rated power of the specific unit indexed on this page — C26D00-100-782KCP2 00-179-1614.9KW 1FK7101-5AY71-1SY3-Z S77 — is 14.9 kW, positioning it in the upper-mid power band of the 1FK7 family.

The Evolution of 1FK7 Architecture

The 1FK7 series was introduced by Siemens as a successor to the 1FT6 and 1FK6 families, consolidating the motor frame design around a compact, high-pole-count rotor optimized for dynamic positioning tasks. Early variants used resolver feedback (suffix -1AA, -1AB) and were paired with SIMODRIVE 611 analog drive modules. As digital fieldbus adoption accelerated through the 2000s, Siemens introduced DRIVE-CLiQ interface variants (suffix -1SY, -1SD), enabling direct plug-and-play commissioning with SINAMICS S120 CU320-2 control units without manual encoder parameterization.

The KUKA integration layer added robot-specific winding configurations and thermal class upgrades (F-class insulation, IP64 standard sealing) to meet the duty-cycle demands of 6-axis articulated robot joints. The -Z suffix in the order number denotes a customer-specific or special configuration, which in the context of KUKA robot integration typically includes modified shaft geometry, special connector orientation, or factory-installed holding brake variants. The S77 designation references the KUKA-internal robot model compatibility code, confirming fitment for specific KUKA KR series robot arms.

Compatibility note: 1FK7 motors with DRIVE-CLiQ encoders are not backward-compatible with SIMODRIVE 611 analog drives without an SMC20 sensor module. Installations migrating from 611 to S120 must verify encoder suffix before ordering.

1FK7 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked models within the KUKA/Siemens 1FK7 series. Models are grouped by functional category:

High-Power Axis Motors (≥7.5 kW)

• 1FK7101-5AY71-1SY3-Z S77: 14.9 kW rated, DRIVE-CLiQ encoder, KUKA KR series primary axis motor, special config (-Z), IP64
• 1FK7101-5AY71-1AA0: 14.9 kW, resolver feedback, standard shaft, SIMODRIVE 611 compatible
• 1FK7083-2AF71-1SG0: 7.65 kW, DRIVE-CLiQ, natural cooling, flange size 83 mm
• 1FK7083-2AF71-1AA0: 7.65 kW, resolver, natural cooling, SIMODRIVE 611 compatible
• 1FK7080-2AC71-1SG0: 5.5 kW, DRIVE-CLiQ, compact frame, high dynamic response

Mid-Power Axis Motors (2 kW – 7.5 kW)

• 1FK7063-2AF71-1SG0: 3.7 kW, DRIVE-CLiQ, 63 mm frame, wrist/elbow axis application
• 1FK7063-2AF71-1AA0: 3.7 kW, resolver, standard flange, SIMODRIVE 611
• 1FK7060-2AF71-1SG0: 2.7 kW, DRIVE-CLiQ, natural cooling, compact integration
• 1FK7044-2AF71-1SG0: 2.0 kW, DRIVE-CLiQ, 44 mm frame, small joint axis
• 1FK7044-2AF71-1AA0: 2.0 kW, resolver, 44 mm frame, SIMODRIVE 611

Low-Power / Auxiliary Axis Motors (<2 kW)

• 1FK7032-2AK71-1SG0: 0.85 kW, DRIVE-CLiQ, 32 mm frame, auxiliary/tool axis
• 1FK7022-2AK71-1SG0: 0.45 kW, DRIVE-CLiQ, 22 mm frame, ultra-compact positioning
• 1FK7036-2AK71-1SG0: 1.1 kW, DRIVE-CLiQ, 36 mm frame, conveyor/positioner axis

Special Configuration / KUKA-Specific Variants

• 1FK7101-5AY71-1SY3-Z S77: Primary listing — 14.9 kW, KUKA KR robot axis, DRIVE-CLiQ, special shaft/connector (-Z)
• 1FK7083-2AF71-1SY3-Z S77: 7.65 kW KUKA variant, DRIVE-CLiQ, special config for KR mid-range robots
• 1FK7063-2AF71-1SY3-Z S77: 3.7 kW KUKA variant, wrist axis, DRIVE-CLiQ, special config
• 1FK7044-2AF71-1SY3-Z S77: 2.0 kW KUKA variant, small joint, DRIVE-CLiQ, special config

Sourcing Hard-to-Find & Obsolete 1FK7 Parts

The 1FK7 series entered its mature lifecycle phase in the mid-2010s. While Siemens continues to manufacture select variants, a significant portion of KUKA-specific configurations (particularly -Z suffix and S77-coded units) are no longer available through standard distribution channels and must be sourced from specialist industrial spare parts suppliers.

Quality Control for the 1FK7 Range

All 1FK7 units processed by DriveKNMS undergo a structured inspection protocol before dispatch:

• Winding resistance and insulation test: Phase-to-phase resistance balance check; insulation resistance measured at 500 VDC (minimum 100 MΩ).
• Encoder integrity verification: DRIVE-CLiQ units are connected to a SINAMICS S120 test bench for electronic nameplate readback and encoder signal validation. Resolver units are tested for signal amplitude and phase offset.
• Bearing and shaft inspection: Axial and radial play measured against OEM tolerances; shaft runout checked with dial gauge.
• Holding brake test: Where fitted, brake engagement/release torque verified against rated holding torque specification.
• Thermal class and sealing check: IP rating verified by visual inspection of seals, cable entry glands, and connector interfaces.
• KUKA -Z configuration verification: Special-configuration units are cross-referenced against KUKA robot model documentation to confirm connector orientation, shaft key dimensions, and brake wiring pinout.