Siemens SIMOTICS S-1FT7 Synchronous Servo Motor

Siemens SIMOTICS S-1FT7 Synchronous Servo Motor About

The Siemens 1FT7086-5AC71-1LH1 is a SIMOTICS S-1FT7 synchronous servo motor designed for high-performance motion control, CNC machine tools, robotics, and industrial automation applications. It is a naturally cooled permanent-magnet synchronous motor with a rated torque of 28 Nm, rated speed of 2,000 RPM, and rated output power of approximately 4.71 kW. The motor is engineered for precise speed, torque, and position control and is suitable for integration with Siemens SINAMICS drive systems. Its 1FT7 construction provides high dynamic response and reliable continuous operation in demanding industrial environments. Typical applications include CNC axes, machine tools, robotics, material handling, production automation, packaging machinery, and precision positioning systems. The -5AC71 configuration identifies the motor's electrical and mechanical arrangement, while -1LH1 defines the specific feedback, shaft, brake, and connection configuration. For procurement purposes, the exact encoder type, holding-brake specification, protection rating, dimensions, and weight should be verified against the Siemens-specific MLFB datasheet rather than inferred from another 1FT7086 variant.