KUKA 1FK7 Series Servo Motors: A1~SP-AC-servomotorG1/1FK7100-192302

Technical Dossier

Product Details And Specifications

KUKA 1FK7 Series: Comprehensive Module Range and Technical Overview

The Siemens 1FK7 synchronous servo motor series is the standard drive component deployed across KUKA industrial robot platforms — including the KR AGILUS, KR QUANTEC, KR CYBERTECH, and KR IONTEC families — as well as in third-party CNC machining centers, automated assembly lines, chemical processing equipment, and nuclear facility handling systems. In heavy industrial environments such as petrochemical refineries, offshore platform automation, and nuclear power plant fuel-handling cells, the 1FK7 series is specified for its compact frame-to-torque ratio, integrated encoder feedback, and compatibility with SINAMICS S120 drive systems. Global installed base estimates place the 1FK7 among the top three most widely deployed servo motor families in the 0.5–22 kW range within European and Asian heavy industry.

The Evolution of 1FK7 Architecture

The 1FK7 series was introduced by Siemens as a successor to the 1FK6 platform, consolidating the motor feedback interface under the DRIVE-CLiQ protocol and enabling direct plug-and-play integration with SINAMICS S120 and S210 drive families. Early 1FK7 variants (circa 2003–2008) used resolver-based feedback and required separate encoder evaluation boards. From approximately 2009 onward, Siemens standardized the series on the EnDat 2.2 absolute encoder interface, eliminating the need for external referencing on power-up — a critical reliability improvement for KUKA robot joint axes where homing cycles are operationally costly.

The 1FK7 compact (1FK7-C) sub-family introduced a reduced-length housing for axis-2 and axis-3 installations in space-constrained robot arms. The 1FK7 high-inertia (1FK7-H) sub-family addressed applications requiring high load-inertia matching, such as rotary indexing tables and heavy-payload wrist axes. As of 2024, Siemens has transitioned new designs toward the 1FK2 and 1FT7 platforms for next-generation SINAMICS G/S integration, placing the 1FK7 in a mature/sustained-support lifecycle phase. Replacement and repair parts remain in active demand across the global installed base.

1FK7 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed models within the Siemens 1FK7 servo motor series used in KUKA robot and industrial automation applications. Each entry reflects a distinct frame size, torque rating, encoder type, or shaft configuration.

A1~SP-AC-servomotorG1/1FK7100-192302: Axis-1 servo motor, 1FK7100 frame, 192302 encoder config, KUKA KR QUANTEC platform
1FK7060-2AF71-1EH0: 3.0 Nm rated torque, 6000 rpm, EnDat absolute encoder, smooth shaft
1FK7060-2AF71-1FH0: 3.0 Nm, 6000 rpm, EnDat absolute encoder, feather key shaft
1FK7063-2AF71-1EH0: 4.0 Nm rated torque, 6000 rpm, EnDat absolute, smooth shaft
1FK7080-2AF71-1EH0: 7.6 Nm rated torque, 6000 rpm, EnDat absolute encoder, smooth shaft
1FK7080-2AF71-1FH0: 7.6 Nm, 6000 rpm, EnDat absolute encoder, feather key shaft
1FK7083-2AF71-1EH0: 9.5 Nm rated torque, 6000 rpm, EnDat absolute, smooth shaft
1FK7100-2AF71-1EH0: 14.0 Nm rated torque, 6000 rpm, EnDat absolute encoder, smooth shaft
1FK7100-2AF71-1FH0: 14.0 Nm, 6000 rpm, EnDat absolute encoder, feather key shaft
1FK7101-2AF71-1EH0: 18.0 Nm rated torque, 6000 rpm, EnDat absolute, smooth shaft
1FK7105-2AF71-1EH0: 22.0 Nm rated torque, 4500 rpm, EnDat absolute, smooth shaft
1FK7105-2AF71-1FH0: 22.0 Nm, 4500 rpm, EnDat absolute encoder, feather key shaft
1FK7060-2AF71-1RH0: 3.0 Nm, 6000 rpm, resolver feedback, smooth shaft (legacy variant)
1FK7080-2AF71-1RH0: 7.6 Nm, 6000 rpm, resolver feedback, smooth shaft (legacy variant)
1FK7100-2AF71-1RH0: 14.0 Nm, 6000 rpm, resolver feedback, smooth shaft (legacy variant)
1FK7040-2AF71-1EH0: 1.35 Nm rated torque, 6000 rpm, EnDat absolute, compact frame
1FK7044-2AF71-1EH0: 2.0 Nm rated torque, 6000 rpm, EnDat absolute, compact frame
1FK7060-2AF71-1CH0: 3.0 Nm, 6000 rpm, EnDat absolute, 1FK7 compact housing variant

Sourcing Hard-to-Find & Obsolete 1FK7 Parts

DriveKNMS maintains a dedicated inventory program for 1FK7 series motors that have entered end-of-standard-production status with Siemens. Resolver-feedback variants (suffix -1RH0) and early EnDat 1.x encoder variants are no longer manufactured as new units but remain in active service across installed KUKA KR 150, KR 210, and KR 500 robot fleets with operational lifespans extending to 2030 and beyond. DriveKNMS sources these units through certified refurbishment channels, decommissioned equipment recovery, and authorized surplus inventory networks. All units are cross-referenced against Siemens material numbers and KUKA robot BOM documentation before listing. Customers operating legacy KUKA systems who require axis-replacement motors without full robot controller upgrades are the primary beneficiaries of this program.

Quality Control for the 1FK7 Range

The 1FK7 series presents specific test challenges due to its integrated DRIVE-CLiQ encoder interface and multi-pole permanent magnet rotor construction. DriveKNMS applies the following verification protocol to all 1FK7 units processed through its facility: (1) Winding resistance and insulation resistance measurement per IEC 60034-1, with phase-to-phase and phase-to-ground checks at 500 V DC. (2) DRIVE-CLiQ interface enumeration test using a SINAMICS S120 CU320-2 control unit to confirm encoder data transmission, motor ID data block integrity, and temperature sensor response. (3) No-load run test at rated speed (typically 3000–6000 rpm) on a servo drive test bench, with vibration signature analysis to detect bearing wear or rotor imbalance. (4) Brake function test (where applicable) confirming holding torque within ±10% of nameplate specification. (5) Shaft runout measurement using a dial indicator, with acceptance criterion of ≤0.02 mm TIR. Units failing any parameter are quarantined and documented; no failed unit is relisted or shipped.

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.