Mitsubishi HG-KR43J Servo Motor: 400W Low Inertia for Precision Motion Control

Technical Specifications Breakdown

The HG-KR43J offers a balanced set of performance parameters for dynamic control:

• Rated torque: 1.3 Nm; maximum torque reaches 4.5 Nm for short bursts.
• Rated speed: 3000 rpm; maximum speed is 6000 rpm for rapid movements.
• Rated current: 2.6 A; maximum current is 9.1 amps.
• Motor type: Low inertia/small capacity, enabling quick acceleration and deceleration.
• Maximum radial load: 245 N, supporting robust mechanical connections.
• Connection type: 4-pin rectangular connector for secure wiring.

Industry Applications

In robotics, the HG-KR43J provides the torque and speed needed for joint actuation and end-effector control. Its low inertia design allows rapid direction changes, improving cycle times. For machine tools, the motor drives spindles or feed axes with accuracy, reducing scrap rates. In general automation systems, it handles pick-and-place, labeling, and assembly tasks reliably.

Installation & Setup Guidance

Mount the HG-KR43J using its flange mounting option. Ensure the mounting surface is flat and rigid to minimize vibration. Connect the 4-pin rectangular connector according to the manufacturer's wiring diagram. Use natural cooling—keep the motor's enclosure free from obstructions to allow airflow. The IP65 rating makes it dust-tight and resistant to water jets, but avoid direct high-pressure spray on connectors.

Maintenance & Reliability

Routine inspection of the oil seal is recommended to prevent contamination from oil or debris. Check the shaft and connector for wear periodically. The motor's natural cooling design reduces maintenance needs compared to fan-cooled units. Operating in temperatures from 0 to 40 degrees Celsius ensures optimal performance. The absence of a reduction gear and electromagnetic brake simplifies upkeep.

What Is the HG-KR43J Servo Motor?

When precision motion control is critical in industrial automation, the Mitsubishi HG-KR43J servo motor delivers reliable performance. This AC brushless rotary servo motor belongs to the MELSERVO J4 series and is designed for applications requiring accurate speed, torque, and position control. With a rated output of 400 W, the HG-KR43J is suitable for low to moderate power needs in robotics, machine tools, and automated systems.

Selection Guide & Purchasing Advice

Before ordering the HG-KR43J, verify your system's voltage and drive compatibility. This motor does not include a brake or gearbox—plan for external holding brakes if required. The standard shaft type suits most direct coupling applications. AutoDCSTech offers genuine Mitsubishi parts with fast shipping. Contact our team to confirm stock and lead times.