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1FK7042-2AK71-1CH2
Siemens 1FK7042-2AK71-1CH2 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens 1FK7042-2AK71-1CH2 is a SIMOTICS S-1FK7 compact permanent-magnet synchronous motor designed for precise motion control in industrial automation systems. Built for dynamic servo applications, it combines a compact frame with high torque performance, making it suitable for machinery requiring accurate positioning, repeatable movement and efficient drive response.
This motor features a 48 mm shaft height, natural cooling, a plain shaft end and rotatable connectors for signal and power connections. It is equipped with a holding brake and an AM24DQI absolute encoder with 24-bit resolution plus 12-bit multiturn capability, supporting accurate feedback across demanding motion profiles. Key performance data includes a rated speed of 6000 rpm, static torque of 3.00 Nm at 100 K, rated torque of 1.5 Nm and a maximum torque of 10.5 Nm, with a maximum permissible speed of 9000 rpm.
With an IP65 protection rating and IP67 protection at the drive-end flange, the 1FK7042-2AK71-1CH2 is suited to use in robust industrial environments. Its anthracite RAL 7016 housing, IM B5 mounting arrangement and integrated Pt1000 temperature monitoring make it a practical choice for machine tools, packaging equipment, handling systems and other servo-driven automation applications.
This motor features a 48 mm shaft height, natural cooling, a plain shaft end and rotatable connectors for signal and power connections. It is equipped with a holding brake and an AM24DQI absolute encoder with 24-bit resolution plus 12-bit multiturn capability, supporting accurate feedback across demanding motion profiles. Key performance data includes a rated speed of 6000 rpm, static torque of 3.00 Nm at 100 K, rated torque of 1.5 Nm and a maximum torque of 10.5 Nm, with a maximum permissible speed of 9000 rpm.
With an IP65 protection rating and IP67 protection at the drive-end flange, the 1FK7042-2AK71-1CH2 is suited to use in robust industrial environments. Its anthracite RAL 7016 housing, IM B5 mounting arrangement and integrated Pt1000 temperature monitoring make it a practical choice for machine tools, packaging equipment, handling systems and other servo-driven automation applications.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part Number | 1FK7042-2AK71-1CH2 |
| Product Range | SIMOTICS S-1FK7 |
| Product Type | Permanent-magnet synchronous servo motor |
| Motor Design | Compact servo motor for dynamic motion control applications |
| Static Torque at 100 K | 2.50 Nm |
| Static Torque at 60 K | 3.00 Nm |
| Rated Torque at 100 K | 1.5 Nm |
| Rated Speed at 100 K | 6000 rpm |
| Optimum Speed | 5000 rpm |
| Optimum Power | 1.0 kW |
| Maximum Torque | 10.5 Nm |
| Rated Current | 3.55 A |
| Stall Current at 100 K | 4.40 A |
| Stall Current at 60 K | 2.5 A |
| Maximum Current | 15.3 A |
| Efficiency | 89.0% |
| Number of Poles | 8 |
| Shaft Height | 48 mm |
| Shaft End | Plain shaft |
| Cooling Method | Natural cooling |
| Encoder System | AM24DQI absolute encoder, 24-bit resolution with 12-bit multiturn capability |
| Temperature Monitoring | Pt1000 temperature sensor |
| Holding Brake | Integrated holding brake |
| Brake Type | Permanent-magnet brake |
| Holding Torque | 4.0 Nm |
| Brake Supply Voltage | DC 24 V ± 10% |
| Coil Current | 0.5 A |
| Highest Braking Work | 150 J |
| Brake Opening Time | 30 ms |
| Brake Closing Time | 70 ms |
| Maximum Mechanical Speed | 9000 rpm |
| Maximum Converter Speed | 9000 rpm |
| Recommended Motor Module | 5 A |
| Maximum Inverter Current | 15 A |
| Rated Inverter Current | 5 A |
| Electrical Connectors | Rotatable connectors for signal and power connections |
| Connector Size | 1 |
| Degree of Protection | IP65, with drive-end flange rated IP67 |
| Mounting Arrangement | IM B5, compatible with IM V1 and IM V3 mounting positions |
| Vibration Severity Grade | Grade A |
| Radial Runout Tolerance | 0.040 mm |
| Concentricity Tolerance | 0.08 mm |
| Axial Runout Tolerance | 0.08 mm |
| Moment of Inertia | 3.200 kgcm² |
| Winding Resistance at 20°C | 1.15 Ω |
| Voltage Constant at 20°C | 44.5 V/1000 rpm |
| Torque Constant | 0.68 Nm/A |
| Rotating Field Inductance | 8.6 mH |
| Electrical Time Constant | 2.15 ms |
| Mechanical Time Constant | 7.50 ms |
| Thermal Time Constant | 30 min |
| Shaft Torsional Stiffness | 11400 Nm/rad |
| Housing Colour | Standard anthracite grey, RAL 7016 |
| Net Motor Weight | 5.3 kg |
What type of motor is this component?
This component is a Siemens SIMOTICS S-1FK7 compact permanent-magnet synchronous motor designed for servo motion applications requiring precise positioning, high dynamic response and reliable torque control.
What is the rated speed of this motor?
The rated speed is 6000 rpm at 100 K, while the optimum operating speed is listed as 5000 rpm.
What torque values are associated with this motor?
The motor has a rated torque of 1.5 Nm at 100 K, a static torque of 2.5 Nm at 60 K and 3.0 Nm at 100 K, with a maximum torque of up to 10.5 Nm according to the Siemens data.
Does this motor include a holding brake?
Yes. The 1FK7042-2AK71-1CH2 configuration includes a holding brake with a permanent-magnet brake design, 4.0 Nm holding torque, 24 V DC supply and 0.5 A coil current.
What encoder system is fitted to this motor?
It uses an AM24DQI absolute encoder with 24-bit resolution, encoder-internal 2048 S/R and 12-bit multi-turn capability over a traversing range of 4096 revolutions.
What is the ingress protection rating?
The motor is rated IP65 overall, with the drive-end flange rated to IP67. This helps protect the unit against dust ingress and water exposure within the stated protection limits.
What mounting arrangement does this motor use?
The motor is designed according to Code I and supports IM B5 mounting, including IM V1 and IM V3 orientations.
What shaft type does this motor have?
This motor is specified with a plain shaft end, making it suitable for coupling into compatible servo drive and motion assemblies where a keyed shaft is not required.
What cooling method is used?
The motor uses natural cooling, meaning it is self-cooled rather than relying on a separately powered fan.
What are the main electrical characteristics?
Key electrical values include 2.5 A rated current, 3.55 A stall current at 100 K, 4.40 A stall current at 60 K, 1.15 ohm winding resistance at 20 °C, 8.6 mH rotating field inductance and a torque constant of 0.68 Nm/A.
What is the maximum permissible speed?
The maximum permissible speed is 9000 rpm, both mechanically and when operated with the inverter.
What is the recommended motor module current rating?
The recommended motor module is listed with a 5 A rated inverter current and 15 A maximum inverter current.
What is the motor’s approximate weight?
The net motor weight is approximately 5.3 kg, based on the Siemens technical data.
What housing colour is specified?
The standard housing colour is anthracite, RAL 7016.
What applications is this motor typically suited to?
This type of compact servo motor is commonly used in automated machinery, positioning axes, packaging equipment, handling systems, machine tools and other motion-control applications requiring accurate speed and torque performance.
- Precision motion control in automated manufacturing equipment
- Servo-driven positioning axes in packaging machinery
- Rotary and indexing applications requiring accurate speed and torque control
- Machine tool feed axes and auxiliary motion systems
- Robotics and handling systems requiring compact, high-performance servo motion
- Conveyor positioning where repeatable movement and controlled acceleration are required
- Pick-and-place equipment using multi-turn absolute encoder feedback
- Printing, converting and labelling machinery requiring synchronised motion
- Assembly line automation with controlled start-stop operation
- Industrial machinery requiring a compact permanent-magnet synchronous servo motor with holding brake functionality
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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