Description
Product Description
The Siemens 1FT7138-5SB7X-XXXX is a heavy-duty SIMOTICS S-1FT7 permanent magnet synchronous servo motor engineered for extremely demanding motion control applications requiring exceptional torque, precision, and continuous-duty performance. Designed for seamless integration with Siemens SINAMICS S120 servo drive systems via the DRIVE-CLiQ interface, this forced-ventilated servo motor delivers outstanding overload capability, high torque density, and superior positioning accuracy for large CNC machine tools, rotary tables, metal forming equipment, heavy robotics, and automated manufacturing systems.
Operating at a rated speed of 1,500 RPM, the 1FT7138-5SB7X-XXXX delivers 39.0 kW optimum output power, 250 Nm rated torque (100 K), and 280 Nm stall torque (100 K). The motor is capable of producing up to 605 Nm maximum torque while supporting a maximum mechanical speed of 3,600 RPM, making it ideal for applications requiring extremely high torque, rapid acceleration, and precise servo control under continuous heavy-duty conditions. Its permanent magnet rotor design provides high efficiency, low maintenance, and outstanding dynamic performance.
The 1FT7138-5SB7X-XXXX family includes numerous MLFB variants with different encoder technologies, shaft configurations (plain shaft or fitted key), optional permanent-magnet holding brakes, connector orientations, vibration grades, and protection classes. All variants feature forced ventilation, IM B5 flange mounting, integrated temperature monitoring, and DRIVE-CLiQ communication. The exact motor configuration is determined by the complete Siemens MLFB ordering code.
Key Features
- Genuine Siemens SIMOTICS S-1FT7 synchronous servo motor
- Permanent magnet synchronous motor technology
- Optimized for Siemens SINAMICS S120 servo drives
- Forced ventilation cooling
- Optimum output power: 39.0 kW
- Rated speed: 1,500 RPM
- Rated torque: 250 Nm
- Stall torque (100 K): 280 Nm
- Maximum torque: 605 Nm
- Maximum mechanical speed: 3,600 RPM
- High efficiency (95%)
- DRIVE-CLiQ digital encoder interface
- Incremental, single-turn absolute, and multiturn absolute encoder options
- Plain shaft or fitted key shaft versions
- Optional permanent-magnet holding brake
- IM B5 flange mounting
- Integrated Pt1000 temperature monitoring
- IP64 / IP65 / IP67 protection (variant dependent)
Technical Specifications
| Specification | Details |
|---|---|
| Product Family | SIMOTICS S-1FT7 |
| Part Number | 1FT7138-5SB7X-XXXX |
| Motor Type | Permanent Magnet Synchronous Servo Motor |
| Cooling Method | Forced Ventilation |
| Optimum Output Power | 39.0 kW |
| Rated Speed | 1,500 RPM |
| Optimum Speed | 1,500 RPM |
| Rated Torque (100 K) | 250 Nm |
| Stall Torque (100 K) | 280 Nm |
| Stall Torque (60 K) | 230 Nm |
| Maximum Torque | 605 Nm |
| Rated Current | 79 A |
| Stall Current (100 K) | 85 A |
| Stall Current (60 K) | 74 A |
| Maximum Current | 225 A |
| Maximum Mechanical Speed | 3,600 RPM |
| Maximum Converter Speed | 2,700 RPM |
| Rated Converter Current | 85 A |
| Maximum Converter Current | 141 A |
| Maximum Converter Torque | 415 Nm |
| Number of Poles | 8 |
| Efficiency | 95% |
| Torque Constant | 3.20 Nm/A |
| Voltage Constant | 211 V/1000 RPM |
| Rotor Moment of Inertia | 896 × 10⁻⁴ kg·m² |
| Encoder Interface | DRIVE-CLiQ |
| Encoder Options | Incremental, Single-turn Absolute, Multiturn Absolute |
| Shaft Options | Plain Shaft or Fitted Key |
| Holding Brake | Optional Permanent-Magnet Brake |
| Mounting Arrangement | IM B5 Flange |
| Temperature Monitoring | Integrated Pt1000 Temperature Sensor |
| Protection Class | IP64 / IP65 / IP67 (variant dependent) |
| Compatible Drives | Siemens SINAMICS S120 |
| Manufacturer | Siemens |
Technical specifications may vary depending on the selected encoder, shaft type, holding brake, connector orientation, and complete Siemens MLFB configuration.
Applications
- Heavy CNC Machine Tools
- Metal Cutting & Forming Machinery
- Press Automation
- Large Industrial Robotics
- Rotary Tables
- Steel Processing Equipment
- Heavy Material Handling Systems
- Printing Machinery
- Packaging Equipment
- High-Torque Precision Motion Control