Description
SIMOTICS Synchronous Motors – Compact, Precise, and High-Performance
SIMOTICS S-1FK7 motors are permanent magnet synchronous motors available in Compact, High Dynamic, and High Inertia versions. Self-cooled and highly robust, they offer excellent overload capability, durability, and a compact design. Rotatable connectors and preassembled cables allow for a flexible, fast, and safe connection to the converter.
SIMOTICS S-1FT7 servomotors are also permanent magnet synchronous motors, designed with highly compact dimensions and engineered to meet the most stringent demands for precision, dynamic performance, speed range, and ruggedness. Equipped with the latest encoder technology, these motors are optimized for use with fully digital drive and control systems.
Cooling options include natural, external, or water cooling:
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Natural cooling dissipates thermal losses through the motor surface.
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External cooling uses an attached fan to remove heat.
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Water cooling provides maximum heat dissipation, enabling peak performance.
Siemens Servo Motor — SIMOTICS Range
Shah N Shah supplies genuine Siemens servo motors from the SIMOTICS S range, used for precision motion control in machine building, packaging, robotics, and CNC applications. As an authorized Siemens supplier, we stock servo motors with manufacturer warranty and technical support for pairing the right motor to your drive and application.
Siemens SIMOTICS Servo Motor Series We Supply
SIMOTICS S-1FK7 — The proven standard servo motor for motion control, available in Compact, High Dynamic, and High Inertia versions across a 0.05 kW to 8.2 kW power range and 0.08–37 Nm for Compact, 0.9–18 Nm for High Dynamic, and 1.5–37 Nm for High Inertia torque range. Naturally cooled, with superior overload capability and a rugged design, connecting to SINAMICS S120 drives via the DRIVE-CLiQ interface.
SIMOTICS S-1FK2 / S-1FT2 — Siemens’ current-generation servo motor series, offering improved performance and broader application coverage than the 1FK7. The 1FK2 is a compact, cost-optimized option with fewer variants; the 1FT2 offers a wider range of torque classes, environmental variants, and speed options for more demanding requirements. Siemens now recommends 1FK2/1FT2 for new projects.
Both series integrate directly with SINAMICS S120/S220 drives via the DRIVE-CLiQ interface, with an electronic motor nameplate for automatic parameterization and two-cable connection technology for faster commissioning.
Why Use a Siemens Servo Motor
A servo motor gives precise control over position, speed, and torque compared to a standard induction motor — critical for applications like pick-and-place, indexing, synchronized multi-axis motion, and any process where exact positioning or fast, repeatable acceleration matters. SIMOTICS servo motors are designed to integrate directly with SINAMICS servo drives and SIMATIC PLCs (S7-1200 and S7-1500), giving a matched, single-vendor motion control system from controller to motor.
Applications
Siemens servo motors are commonly specified for packaging machinery, CNC and robotic systems, printing and converting equipment, and any OEM machine where motion accuracy and cycle-time performance directly affect throughput or product quality.
Choosing Between 1FK7 and 1FK2/1FT2
If you’re maintaining or expanding an existing SINAMICS S120 installation already running 1FK7 motors, staying with the 1FK7 series keeps parts and spares consistent. For new projects, Siemens’ current recommendation is the 1FK2 (compact applications) or 1FT2 (wider torque/speed range) for improved performance. Share your torque, speed, and inertia requirement and our team can help confirm the right series and frame size.
Siemens Servo Motors and Drives Together
For a complete motion control setup, our SIMOTICS servo motors are typically paired with matching SINAMICS servo drives — share your application’s torque, speed, and axis-count requirements and our team can help confirm the right motor-drive combination. → Servo Drives
Siemens Servo Motor Series: 1FL6, 1FK7, 1FK2 and 1FT2
The correct Siemens servo motor depends on the drive platform, machine dynamics, torque, speed, encoder and mechanical requirements. The main SIMOTICS S families relevant to machine automation include:
SIMOTICS S-1FL6 — Designed for the SINAMICS V90 servo system. Siemens lists the V90 system with S-1FL6 motors across 0.05 to 7.0 kW, making this combination suitable for compact positioning, packaging, material handling and other machine automation applications.
SIMOTICS S-1FK7 — A flexible S120 servo motor family available in Compact, High Dynamic and High Inertia versions. It is particularly relevant when an existing machine already uses the S120 platform or when different inertia and dynamic-performance options are required.
SIMOTICS S-1FK2 — A newer-generation SIMOTICS S servo motor family for modern machine applications. It is part of the current Siemens motion portfolio and should be evaluated with the intended SINAMICS drive and application requirements.
SIMOTICS S-1FT2 — A synchronous servo motor family available for SINAMICS systems, including S120 applications. Siemens documentation covers variants for production machines, machine tools and S210 applications, so selection should be based on the exact motor and drive configuration.
Siemens Servo Motor and SINAMICS Drive Compatibility
For a reliable servo system, the motor and drive must be selected as a matched combination. S-1FL6 + SINAMICS V90 is the standard Siemens V90 servo combination, while S-1FK7 / S-1FK2 / S-1FT2 families are used across higher-performance SINAMICS platforms depending on the exact configuration. Share the existing drive model or motor order number and we can help check compatibility.
How to Select the Correct Siemens Servo Motor
Before selecting a Siemens servo motor, confirm the required continuous and peak torque, operating speed, load inertia, motor power, encoder type, holding-brake requirement, mounting arrangement, protection rating and intended SINAMICS drive. For replacement applications, the existing Siemens MLFB/order number is often the fastest way to identify the correct motor.
How to Identify a Siemens Servo Motor by Its Part Number
If you need a replacement or equivalent Siemens servo motor, send the complete motor order number or a clear photo of the nameplate. The order information can identify the motor family and configuration, while the nameplate helps confirm power, speed, encoder, brake and other application-specific details. This is especially useful when replacing an older motor without changing the existing machine configuration.
Siemens V90 Servo Motor vs S120 Servo System
The SINAMICS V90 + SIMOTICS S-1FL6 combination is designed as a compact servo system for machine automation. S120-based systems provide a broader motion-control platform and can be paired with SIMOTICS S motor families such as 1FK7 and 1FT2 depending on the application. The right choice depends on axis count, dynamics, drive architecture and the machine’s existing control system.
Siemens Servo Motor Applications
Typical applications include packaging machines, CNC and machine tools, robotics, printing and converting, pick-and-place systems, indexing machines, electronic assembly, material handling and other OEM equipment requiring controlled position, speed and torque.
Why Buy Siemens Servo Motors from Shah N Shah
- Genuine Siemens SIMOTICS stock (1FK7, 1FK2, 1FT2) with full manufacturer warranty
- Technical support for motor-drive-PLC matching
- Bulk pricing for OEMs and system integrators
- Pan-India dispatch with datasheets and technical support
Which Siemens servo motor is compatible with SINAMICS V90?
The SIMOTICS S-1FL6 is the servo motor family designed for the SINAMICS V90 servo system. Siemens specifies the V90 system with S-1FL6 motors across a 0.05 to 7.0 kW power range.
What is the difference between Siemens 1FL6 and 1FK7 servo motors?
The 1FL6 is associated with the SINAMICS V90 servo system and is commonly used for compact machine automation. The 1FK7 is a broader SIMOTICS S family used with SINAMICS S120 and is available in Compact, High Dynamic and High Inertia versions.
What is the difference between Siemens 1FK7 and 1FK2 servo motors?
The SIMOTICS S-1FK7 is an established servo motor family with Compact, High Dynamic and High Inertia variants. Siemens currently recommends the 1FK2 or 1FT2 families for new projects where their newer capabilities are appropriate.
How do I select the correct Siemens servo motor?
Selection should consider continuous and peak torque, operating speed, load inertia, motor power, encoder type, holding brake, mounting arrangement, protection rating and compatibility with the intended SINAMICS drive. For replacement applications, the existing Siemens MLFB/order number is particularly useful.
What information is needed to select or quote a Siemens servo motor?
Provide the motor part number/MLFB, required power or torque, operating speed, encoder requirement, brake requirement, supply voltage, application and existing SINAMICS drive model. A clear photo of the existing motor nameplate can also help identify the correct replacement.
What is the difference between a Siemens servo motor and servo drive?
The servo motor converts electrical energy into controlled mechanical motion. The servo drive controls the motor's current, speed, torque and position according to commands from the machine controller. A complete Siemens motion system can combine SIMOTICS motors with SINAMICS drives.
Can a Siemens servo motor be used for CNC and robotics?
Yes. SIMOTICS servo motors are used in applications requiring controlled position, speed and torque, including CNC/machine tools, robotics, packaging, printing, converting and other automated machinery. The exact motor should be selected according to the application's torque, speed, inertia and drive requirements.
What is the difference between SINAMICS V90 and S120 servo systems?
SINAMICS V90 + SIMOTICS S-1FL6 is a compact servo combination intended for machine automation applications. SINAMICS S120 provides a broader motion-control platform and can be configured with SIMOTICS S families such as 1FK7 and 1FT2 depending on the application.
Can you identify a Siemens servo motor from its part number?
Yes. The complete Siemens MLFB/order number can be used to identify the motor family and configuration. For example, Siemens Industry Mall product records provide specifications such as power, rated speed, torque, encoder, brake and protection rating for individual motor order numbers.
