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Siemens Servo Motor 1FK7

Servomotors 1FK7

The ideal solution for standard Motion Control applications

 1FK7 synchronous motors - top standard for synchronous motors

1FK7 motors are permanent magnet excited synchronous motors which are available in the versions Compact, High Dynamic and High Inertia. The self-cooled motors are characterized by superior overload capability, ruggedness and compactness. The connection via rotatable connectors and preassembled cables ensures a flexible, fast and safe connection to the converter.


1FK7 Compact (CT)

  • The universal motor for a wide range of applications

  • Space-saving installation through very high power density

  • Large range of motors in the shaft heights 20 to 100

  • Preferred types with short delivery times are available


1FK7 High Dynamic (HD)

  • The sprinter in the ramp-up time

  • Very high acceleration capability due to low rotor moment of inertia

  • For highly dynamic applications with low load moment of inertia


1FK7 High Inertia (HI)

  • Docile control behavior with superior load inertia due to the high intrinsic moment of inertia

  • Reduced expenditure for controller optimization

  • Particularly suited for machine tools for feed axis applications requiring superior resp. alternating load inertia.


1FK7 synchronous motors - overview of the product range


Static torque*

Rated speed*

Rated power*

* Depending on the version and type "The detailed technical data can be found on the right-hand side via Everything about... --> Technical Information --> Technical Overview"


0,18 - 48 Nm

2000-6000 U/min

0,05 - 8,17 KW

High Dynamic

1,3 - 28 Nm

3000-6000 U/min

0,57 - 3,77 KW

High Inertia

3 - 20 Nm

2000-6000 U/min

0,9 - 3,1 KW

1FK7 preferred types with a delivery time of 10 days

Rated speed

Rated torque

Static torque

* More information

6,000 rpm

0,6 | 0,8 Nm

0,85 | 1,15 Nm

3,000 rpm

2,6 | 4,7 | 7,9 Nm

3 | 6,9 | 11 Nm

2,000 rpm

12,5 | 20,5 Nm

16 | 27 Nm

The following components are available with a delivery time of 10 days (further versions have a longer delivery time):

  • Single-Turn or Multiturn absolute encoder

  • With resp. without holding brake

  • Smooth shaft end or with fitted key and keyway

More detailed information regarding the topic "Short delivery time for servo drives with SIMOTICS S-1FK7 motors and SINAMICS S110 converters" is provided in the section "Informative Material (Brochures, Catalogs)".


1FK7 synchronous motors - typical areas of application

  • Machine tools (e.g. feed drives)

  • Robots and handling systems

  • Packaging, plastics and textile machines

  • Wood, glass, ceramics and stone processing machines

  • All types of auxiliary axes