Mitsubishi HF-SP121K AC Servo Motor for MELSERVO J2S Series

The Mitsubishi HF-SP121K (HF-SP121K) is an AC brushless rotary servo motor designed for high-performance motion control within the MELSERVO J2S series. Built for heavy-duty industrial automation tasks, this motor delivers a rated output of 7 kW (7,000 W) with a rated speed of 2,000 RPM, a rated torque of 33.4 Nm, and a rated operating current of 35 A on a 200 VAC power supply class. The motor features a straight output shaft equipped with an integrated oil seal and an absolute 17-bit rotary encoder capable of 131,072 pulses per revolution for precision positioning and speed feedback. Mechanical mounting is handled via a standard 176x176 mm flange configuration. Built to withstand demanding industrial plant environments, the housing provides an IP65 protection rating against dust and water ingress, and it is rated for ambient operating temperatures from 0 to +40 degrees Celsius. Typical applications include CNC machine tools, automated packaging lines, and industrial transfer machinery.