Mitsubishi HG-SR51K Rotary Brushless AC Servo Motor with Brake

The Mitsubishi HG-SR51K (HG-SR51K) is a rotary brushless AC servo motor manufactured by Mitsubishi Electric for the HG-SR series, designed for industrial motion control and automated machinery. Equipped with an integrated electromagnetic holding brake and a keyed shaft, this medium-inertia servo motor delivers high-precision rotational positioning, stable low-speed operation, and secure shaft locking during power-off or emergency stop conditions. A high-resolution 26-bit absolute feedback encoder is built directly into the unit, enabling highly accurate multi-turn and single-turn position sensing without requiring a return-to-origin routine upon machine restart. The motor is compatible with Mitsubishi MELSERVO drive systems and is designated as an equivalent replacement profile for HK-ST5024WBK units in MELSERVO-J5 setups. Engineered to withstand demanding production environments, the HG-SR51K provides reliable torque transmission across conveyor systems, packaging machinery, material handling equipment, robotic transfer mechanisms, and CNC machine tool axes. Its robust housing and sealed construction maintain mechanical integrity under continuous duty cycles, ensuring seamless integration and minimal downtime in automated factory operations.