Product Overview
When precise motion control is critical in industrial automation, the Mitsubishi HG-KR73J servo motor delivers reliable performance. This low-inertia, small-capacity motor from the MELSERVO series provides a rated output power of 0.75 kW and a rated torque of 2.4 Nm. With a maximum torque of 8.4 Nm, it handles demanding loads during acceleration and deceleration. The HG-KR73J operates at a rated speed of 3000 rpm and can reach a maximum speed of 6000 rpm, making it suitable for high-speed positioning tasks.
Technical Specifications Breakdown
The HG-KR73J uses a 22-bit encoder with 4,194,304 pulses per revolution for high-resolution feedback. This encoder supports both absolute and incremental systems, ensuring accurate position control even during power loss. The motor requires a 200V AC power supply and draws a rated current of 4.8 Amps with a maximum current of 17 Amps. Its IP65 enclosure rating protects against dust and water ingress, allowing operation in harsh industrial environments. The motor includes an oil seal for additional protection but does not have an electromagnetic brake or thermistor.
Industry Applications
This servo motor excels in low-inertia applications such as CNC machining, robotic arms, and general industrial motion control. In a CNC milling machine, the HG-KR73J provides the rapid acceleration and precise positioning needed for high-quality surface finishes. For robotic pick-and-place systems, its 6000 rpm maximum speed reduces cycle times while maintaining accuracy. The IP65 rating makes it suitable for environments with coolant or dust, such as automotive manufacturing lines.
Installation & Setup Guidance
Mount the HG-KR73J securely using its standard straight shaft design. Ensure the mounting surface is flat and rigid to minimize vibration. Connect the motor to a compatible Mitsubishi servo amplifier using the appropriate cables. Verify that the power supply matches the 200V AC requirement. Do not exceed the rated current of 4.8 Amps during continuous operation. For optimal performance, use the 22-bit encoder feedback to configure the servo drive parameters.
Maintenance & Reliability
Inspect the motor periodically for signs of oil leakage or contamination. The IP65 enclosure reduces maintenance needs, but check the oil seal condition during routine servicing. Operate the motor within 0 to 40 degrees Celsius ambient temperature to ensure longevity. Store the motor at -15 to 70 degrees Celsius when not in use. Avoid freezing conditions to prevent damage. Regular inspection of the encoder connections helps maintain position accuracy.
Selection Guide & Purchasing Advice
Before purchasing the HG-KR73J, verify that your application requires a low-inertia motor without a brake. Confirm compatibility with your servo amplifier and power supply. The HG-KR73J weighs 11.00 lbs (4.99 kg), so ensure your mounting hardware can support it. SpareTechPLC stocks this model and can assist with availability and lifecycle status. Contact our team to confirm current stock and lead times.
Frequently Asked Questions
Q1: What is the rated output power of the HG-KR73J?
A: The HG-KR73J has a rated output power of 0.75 kW.
Q2: What is the maximum speed of this servo motor?
A: The maximum speed is 6000 rpm.
Q3: Does the HG-KR73J include an electromagnetic brake?
A: No, this motor does not have an electromagnetic brake.
Q4: What is the encoder resolution?
A: The 22-bit encoder provides 4,194,304 pulses per revolution.
Q5: Is the HG-KR73J suitable for dusty environments?
A: Yes, its IP65 enclosure rating protects against dust and water ingress.
