Siemens 1FK7101-5AF71-1DG0 SIMOTICS S Synchronous Servo Motor

Product Brief Introduction
The 1FK7101-5AF71-1DG0 is a high-performance synchronous servo motor from the Siemens SIMOTICS S 1FK7 series. It provides high torque and dynamic response for medium-duty motion control applications, compatible with SINAMICS drive family for precise speed and position control.
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Technical Specifications
Frame size: 100. Rated torque: 7Nm. Peak torque: 21Nm. Voltage class: 400V AC. Feedback system: 20-bit absolute encoder. Bearing type: sealed deep groove ball bearing. Protection rating: IP65 shaft, IP65 housing. Operating temperature range: 0°C to +40°C. Weight: 6.5kg.
Functional Features
High torque density design delivers strong output in a compact footprint. Absolute encoder provides position retention without homing on power-up. Low rotor inertia enables fast acceleration and deceleration. IP65 protection suits harsh industrial environments. It supports multi-turn absolute position feedback.
Application Scenarios
It is widely used in CNC machine tools, industrial robots, packaging lines, material handling systems, printing presses, injection molding machines and automated assembly equipment.
Material Composition
Housing is die-cast aluminum alloy with corrosion-resistant coating. Rotor uses rare-earth permanent magnets. Shaft is hardened and ground alloy steel. Bearings are pre-lubricated sealed steel. Encoder housing is plastic with metal shielding.
Structural Characteristics
It features standard IEC frame dimensions, keyed output shaft, rear absolute encoder compartment, circular power connector, signal connector, and B5 flange mounting interface.
Working Principle
It operates on the synchronous permanent magnet principle. The drive supplies variable-frequency three-phase AC power to the stator, generating a rotating magnetic field that drives the permanent magnet rotor. The absolute encoder provides continuous position feedback to the drive for closed-loop position and speed control.
Installation Requirements
Mount via standard B5 flange or foot mount. Ensure proper shaft alignment with the load. Tighten mounting bolts to specified torque.




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