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9852

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9852
May 14, 2026

9852

General Description The 1FK7 is a compact, high‑dynamic permanent magnet synchronous servo motor designed for high‑speed applications (max 9852 rpm). It features low rotor inertia, high power density, and integrated absolute encoder feedback, ideal for machine tool spindles, high‑speed machining centers, and robotic high‑speed axes.

Description

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 General Description

The 1FK7 is a compact, high‑dynamic permanent magnet synchronous servo motor designed for high‑speed applications (max 9852 rpm). It features low rotor inertia, high power density, and integrated absolute encoder feedback, ideal for machine tool spindles, high‑speed machining centers, and robotic high‑speed axes.

2. Type Code (Example: 1FK7103‑5AF71‑1EH0)

  • 1FK7: SIMOTICS S compact servo motor series

  • 103: Frame size (10 = 100 mm)

  • 5AF71: Winding/voltage/speed (400 V, 9852 rpm)

  • 1EH0: Shaft (plain), encoder (absolute EnDat 2048 ppr), with holding brake

3. Technical Specifications

Electrical

  • Rated power: 4.4 kW

  • Rated voltage: 3AC 400 V

  • Rated speed: 3000 rpm

  • Max speed: 9852 rpm

  • Rated torque: 36 Nm (100 K)

  • Peak torque: 72 Nm (2× overload)

  • Encoder: Absolute EnDat 2.2, 2048 ppr

  • Brake: 24 V DC spring‑applied holding brake

  • Insulation class: F (155 °C)

Mechanical & Environmental

  • Mounting: IM B5 flange (IM V1/V3 vertical)

  • Shaft: Plain shaft, tolerance N

  • Protection class: IP64

  • Cooling: Natural cooling (forced air optional for high speed)

  • Operating temp: 0 °C to +40 °C

  • Weight: Approx. 34 kg

4. Encoder System

  • Interface: EnDat 2.2 digital

  • **Multi‑turn absolute position (no battery)

  • Resolution: 2048 ppr

  • Signals: Position, speed, commutation for servo drive

5. Holding Brake

  • Voltage: 24 V DC ±10%

  • Holding torque: 36 Nm (matches motor rating)

  • Operation: Spring‑closed, electric‑release

  • Function: Prevents axis sliding when power is off

6. Installation

  1. Mount via IM B5 flange; avoid shaft impact.

  2. Align coupling/gearbox precisely to prevent radial/axial overload at 9852 rpm.

  3. Use shielded power/encoder cables; EMC grounding mandatory.

  4. Ensure adequate ventilation; avoid covering cooling surfaces.

  5. Observe minimum cable bending radius.

7. Wiring

  • Power: U, V, W, PE

  • Brake: +24 V DC, 0 V DC

  • Encoder: EnDat signals, 5 V DC, shield

8. Safety Instructions

  • Disconnect all power before wiring/maintenance.

  • Wait 5 minutes after power‑off for capacitor discharge.

  • Do not run at 9852 rpm under no‑load for extended periods.

  • Do not disassemble encoder/brake (high‑speed imbalance risk).

  • Ensure reliable PE connection.

9. Maintenance

  • Daily: Check noise, temperature, cable integrity.

  • Periodic: Tighten connectors, inspect brake function, verify encoder signals.

  • Cleaning: Keep motor surface free of dust (critical for cooling).

10. Troubleshooting

  • No rotation: Check power, brake release, drive enable.

  • Overspeed alarm: Check encoder cable, EnDat communication, drive parameters.

  • Overheating: Check cooling, overload, or bearing wear.

  • Brake failure: Check 24 V DC supply and wiring.


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