SIEMENS 1FK7042-2AC71-1CH0 Synchronous Motor

Siemens 1FK7042-2AC71-1CH0 – Compact, High-Precision SIMOTICS S Synchronous Servo Motor

The Siemens 1FK7042-2AC71-1CH0 is a compact, high-performance permanent-magnet synchronous motor from the SIMOTICS S 1FK7 series, designed to meet demanding motion control tasks in industrial automation environments. With exceptional dynamic performance, precise positioning, and a space-saving design, this motor is ideal for applications like packaging machines, pick-and-place systems, machine tools, and robotics.

At the core of its capability is a rated power output of approximately 0.9 kW and rated torque of 2.9 Nm, providing solid performance for medium-load servo tasks. The motor operates at a rated speed of 3000 rpm, with a maximum speed reaching up to 6000 rpm, making it suitable for high-speed cycles while maintaining exceptional control accuracy. Torque peaks up to 10 Nm are achievable depending on the drive configuration, allowing for short-term overload capability.

The 1FK7042-2AC71-1CH0 model utilizes natural convection cooling, eliminating the need for external fans. This self-cooled design simplifies installation and reduces maintenance while maintaining high thermal efficiency. The rotor moment of inertia is approximately 0.27 kg·cm², providing optimal acceleration and deceleration performance with minimal mechanical stress on the drive system.

In terms of mechanical design, this motor features a flange-mounted configuration (IM B5) with a 71 mm flange size, conforming to standardized installation dimensions. The smooth shaft design ensures compatibility with tight mechanical tolerances while eliminating keyway-related backlash. The enclosure is rated IP65, indicating a totally enclosed, dust-tight, and water-jet protected design, which is essential for demanding industrial settings.

One of the key advantages of this motor lies in its feedback system. The integrated encoder indicated by "1CH0" corresponds to a single-turn absolute encoder using digital interfaces like SICK Hiperface DSL or EnDat. These provide high-resolution feedback—up to 20 bits per revolution—enabling ultra-precise control for applications requiring high dynamic response and positioning accuracy. The encoder is connected via an integrated hybrid cable system, simplifying wiring and enhancing signal integrity.

The connectivity and mounting orientation are also user-friendly. The rotatable power connector, typically right-facing, can be adjusted to suit space constraints, making it flexible for control panel layouts and cable routing.

Designed for durability and reliability, the motor supports ambient operation between -20°C and +40°C, with altitude support up to 1000 meters without derating. It also complies with vibration class V10 per DIN EN 60034-14, ensuring mechanical robustness in dynamic environments.

Overall, the 1FK7042-2AC71-1CH0 offers an ideal balance of compact size, high torque density, and precision control. It's a powerful solution for OEMs and integrators who need efficient, reliable servo motors with industry-standard encoder feedback systems. At Anadi Automation, we supply top-tier automation components like this motor, ensuring exceptional support and availability for your industrial motion needs.