steve
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Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime
1 month ago
1FK7084-2AC74-1SG0
Siemens 1FK7084-2AC74-1SG0 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.
Siemens 1FK7084-2AC74-1SG0 is a SIMOTICS S 1FK7 series permanent‑magnet synchronous servo motor designed for precise, dynamic motion control in industrial automation. With an optimum operating point of 3.1 kW at 2000 rpm and an efficiency of 93%, it delivers strong performance for demanding positioning and speed-regulated applications.
This motor provides a rated torque of 15.0 Nm (100 K) and a maximum torque up to 61.0 Nm, supporting rapid acceleration and responsive load handling. It features a plain shaft, natural cooling, and a robust IP64 enclosure, with IM B5 mounting (also suitable for IM V1/IM V3 arrangements). Feedback is provided via a multi-pole resolver matched to the motor’s pole pairs, and integrated temperature monitoring is supported through a Pt1000 sensor.
Key electrical and mechanical characteristics include a torque constant of 2.36 Nm/A, winding resistance of 0.58 Ω at 20°C, rotating field inductance of 12.0 mH, and a moment of inertia of 32.500 kgcm². Maximum permissible speed is 6000 rpm mechanically (up to 3800 rpm inverter-limited, application dependent), making it suitable for a wide range of servo-driven machinery such as packaging, material handling, and production automation systems.
This motor provides a rated torque of 15.0 Nm (100 K) and a maximum torque up to 61.0 Nm, supporting rapid acceleration and responsive load handling. It features a plain shaft, natural cooling, and a robust IP64 enclosure, with IM B5 mounting (also suitable for IM V1/IM V3 arrangements). Feedback is provided via a multi-pole resolver matched to the motor’s pole pairs, and integrated temperature monitoring is supported through a Pt1000 sensor.
Key electrical and mechanical characteristics include a torque constant of 2.36 Nm/A, winding resistance of 0.58 Ω at 20°C, rotating field inductance of 12.0 mH, and a moment of inertia of 32.500 kgcm². Maximum permissible speed is 6000 rpm mechanically (up to 3800 rpm inverter-limited, application dependent), making it suitable for a wide range of servo-driven machinery such as packaging, material handling, and production automation systems.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part Number | 1FK7084-2AC74-1SG0 |
| Alternative Part Number | 1fk70842ac741sg0 |
| Product Type | SIMOTICS S 1FK7 permanent-magnet synchronous motor (servo motor) |
| Part Description | Compact SIMOTICS S 1FK7 permanent‑magnet synchronous motor for precise, dynamic motion control, supplied with natural cooling, IP64 protection, flange mounting (IM B5), plain shaft, multi‑pole resolver feedback, and integrated Pt1000 temperature sensing. |
| Optimum Operating Point Power | 3.1 kW |
| Optimum Speed | 2000 rpm |
| Optimum Torque | 58.40 Nm |
| Optimum Current | 27 A |
| Maximum Torque | 61.0 Nm |
| Maximum Current | 28.5 A |
| Max. Permissible Speed (Mechanical) | 6000 rpm |
| Max. Permissible Speed (Inverter) | 3800 rpm |
| Efficiency | 93.0 % |
| Cooling | Natural cooling |
| Degree of Protection | IP64 |
| Mounting Arrangement | IM B5 (also compatible with IM V1 / IM V3) |
| Shaft Height | 80 |
| Shaft End | Plain shaft |
| Holding Brake | Without holding brake |
| Encoder / Feedback | Multi-pole resolver (pole pairs correspond to motor pole pairs) |
| Temperature Sensor | Pt1000 |
| Electrical Connectors | Rotatable connectors for signals and power |
| Housing Colour | Anthracite RAL 7016 (standard) |
| Net Weight | 18.3 kg |
| Moment of Inertia | 32.500 kgcm² |
| Rotating Field Inductance | 12.0 mH |
| Torque Constant | 2.36 Nm/A |
| Voltage Constant (at 20°C) | 152.0 V/1000 min⁻¹ |
| Shaft Torsional Stiffness | 93000 Nm/rad |
| Mechanical Time Constant | 20.50 ms |
| Electrical Time Constant | 1.02 ms |
| Thermal Time Constant | 55 min |
| Vibration Severity Grade | 1 |
| Radial Runout Tolerance | 0.050 mm |
| Concentricity Tolerance | 0.10 mm |
| Axial Runout Tolerance | 0.10 mm |
What type of motor is this?
It is a permanent-magnet synchronous servo motor from the SIMOTICS S 1FK7 family, designed for dynamic motion control applications with a drive/inverter.
What is the rated (optimum operating point) power output?
The optimum operating point power is 3.1 kW (as specified for the motor’s optimum speed and torque conditions).
What are the optimum speed and torque values?
Optimum speed is 2000 rpm with an optimum torque of 58.40 Nm.
What is the maximum torque and maximum current?
Maximum torque is 61.0 Nm and maximum current is 28.5 A.
What are the permissible maximum speeds?
The mechanically permissible maximum speed is 6000 rpm, and the maximum permissible speed when limited by the inverter is 3800 rpm.
Does this motor include a holding brake?
No. This configuration is specified as without a holding brake.
Which feedback/encoder system does it use?
It uses a multi-pole resolver, where the number of pole pairs corresponds to the number of pole pairs of the motor.
What temperature sensor is fitted for motor monitoring?
A Pt1000 temperature sensor is included for temperature monitoring.
What is the ingress protection rating and cooling method?
The motor has an IP64 degree of protection and uses natural cooling.
What mounting arrangement is specified?
The mounting arrangement is IM B5 (also noted as compatible with IM V1 and IM V3 mounting orientations).
What key electrical constants are provided for drive sizing?
Key constants include torque constant 2.36 Nm/A, winding resistance 0.58 Ω (at 20°C), rotating field inductance 12.0 mH, and voltage constant 152.0 V/1000 min⁻¹ (at 20°C).
What are the motor’s inertia and weight?
Moment of inertia is 32.500 kgcm² and the net motor weight is 18.3 kg (for the configuration 1FK7084-2AC74-1SG0).
- Servo axis drive for CNC machine tools, including feed axes and positioning tables requiring precise speed and torque control
- High-dynamics handling systems such as pick-and-place units, gantries and indexing/rotary stations in automated assembly
- Packaging machinery drives for synchronised motion tasks like sealing jaws, dosing screws, infeed/outfeed timing and carton handling
- Robotics and articulated arm joints where compact permanent-magnet synchronous motors are used for responsive motion profiles
- Printing and converting equipment for registration control, tension regulation and accurately timed roller/shaft drives
- Material handling solutions such as controlled conveyors, diverters and transfer units where repeatable positioning is needed
- Bottle, can and container filling lines for synchronised starwheels, timing screws and labelling mechanisms
- Textile and winding machines for controlled winding/unwinding, dancer control and constant-tension operation
- Woodworking and metalworking automation for indexing, tool positioning and automated fixture movement
- Special-purpose machinery requiring a reliable servo motor with resolver feedback for stable operation across varying loads
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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