Mitsubishi Electric HC-SF121 Servo Motor

The Mitsubishi Electric HC-SF121 servo motor is an AC servo motor from the SF series designed for high-precision motion control in industrial automation, including CNC machines, robotics, packaging equipment, and printing systems. It features flange mounting and a keyed shaft for reliable coupling to drive mechanisms, plus a built-in encoder for feedback that can be absolute or incremental depending on variant. The SF series has an approx. 120 mm body diameter, with rated voltage typically around 200–230 V AC, while current, rpm, and torque vary by the exact variant. Common replacements include Mitsubishi HA‑FF series servo motors with similar ratings and the Yaskawa SGMAV‑04A3A6C.