Siemens / SIMOTICS S-1FK7 Compact
Siemens 1FK7042-5AF71-1FH2 SIMOTICS S-1FK7 Compact Synchronous Servo Motor
A naturally cooled SIMOTICS S-1FK7 Compact synchronous servo motor with a 3.0 Nm static torque rating at 100 K and a 3000 rpm rated speed.
Product Overview
Compact synchronous motion for SINAMICS drive systems
Siemens 1FK7042-5AF71-1FH2 belongs to the SIMOTICS S-1FK7 Compact synchronous-motor family. Siemens configuration data for the 1FK7042-5AF71 motor base identifies a 3.0 Nm static torque at 100 K, a 3000 rpm rated speed and a 0.82 kW rated output.
The motor uses natural cooling and the IM B5 mounting design. Its compact frame is intended for controlled servo motion with a SINAMICS drive system.
Only values stated by Siemens for the 1FK7042-5AF71 motor base and this exact article number are used. Data from other windings, frame lengths or encoder variants is not applied.
Product Specifications
Official data for 1FK7042-5AF71-1FH2
Only values stated by Siemens for this article number or its explicitly identified base module are shown.
Performance data
| Static torque at 100 K | 3.0 Nm |
|---|---|
| Static torque at 60 K | 2.5 Nm |
| Rated speed | 3000 rpm |
| Rated power | 0.82 kW |
| Rated torque at 100 K | 2.6 Nm |
| Rated current | 1.9 A |
| Stall current at 100 K | 2.2 A |
| Stall current at 60 K | 1.8 A |
| Number of poles | 8 |
| Efficiency | 89% |
Mechanical and electrical constants
| Motor family | SIMOTICS S-1FK7 Compact |
|---|---|
| Cooling | Natural cooling |
| Mounting design | IM B5 (IM V1, IM V3) |
| Shaft height | 48 |
| Rotor moment of inertia | 3.01 kgcm² |
| Torque constant | 1.40 Nm/A |
| Voltage constant at 20 °C | 89.0 V per 1000 rpm |
| Winding resistance at 20 °C | 5.15 Ω |
| Rotating-field inductance | 29.0 mH |
| Thermal time constant | 18 min |
Operating Functions
Rated motion data for the 1FK7042 motor base
Torque and speed point
The Siemens motor data identifies 3.0 Nm static torque at 100 K and a 3000 rpm rated speed.
Synchronous servo operation
The permanent-magnet synchronous design is intended for controlled servo axes.
Natural cooling
Heat dissipation is provided by natural cooling for the stated motor configuration.
Compact frame
The 1FK7042 motor base uses shaft height 48 and IM B5 mounting.
Installation Highlights
Mounting and drive-system planning
Installation planning should follow the exact Siemens motor configuration data and the machine builder’s SINAMICS system design.
FAQ
Questions about Siemens 1FK7042-5AF71-1FH2
What product is Siemens 1FK7042-5AF71-1FH2?
It is a SIMOTICS S-1FK7 Compact permanent-magnet synchronous servo motor.
What is the rated speed of the 1FK7042-5AF71 motor base?
Siemens lists a rated speed of 3000 rpm.
What torque data is stated for this motor base?
The Siemens configuration data states 3.0 Nm static torque at 100 K and 2.6 Nm rated torque at 100 K.
How is the motor cooled?
The stated configuration uses natural cooling.
What mounting design is specified?
Siemens identifies the IM B5 design, including the IM V1 and IM V3 mounting positions.
Recommended Products
Additional industrial automation models
Mixed-brand model references from the supplied historical recommendation library.
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Contact Information
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