Description
🔧 Mitsubishi HG-JR73 – Description
The HG-JR73 is a Mitsubishi Electric HG Series AC servo motor (MELSERVO-J4 family) used mainly for CNC machine feed axis applications such as X, Y, and Z movement systems.
It is a medium-power, low-inertia rotary servo motor designed for fast response, precise positioning, and smooth motion control in industrial automation.
⚙️ Key Description
- Series: Mitsubishi HG (MELSERVO-J4)
- Type: AC brushless rotary servo motor
- Power class: 750 W (0.75 kW)
- Application: CNC feed axes, automation systems, positioning drives
- Encoder: 22-bit absolute encoder (≈ 4,194,304 pulses/rev)
📊 Electrical & Performance Specs
- Rated output: 0.75 kW
- Rated torque: 2.4 N·m
- Maximum torque: ~7.2 N·m
- Rated speed: 3000 rpm
- Maximum speed: 6000 rpm
- Voltage class: 200 VAC
- Rated current: ~4.8–5.6 A (variant-dependent)
🧩 Mechanical Features
- Frame size: ~80–90 mm class servo motor
- Structure: Totally enclosed, fan-cooled (IP65–IP67 depending on variant)
- Inertia: Low inertia design for fast acceleration
- Shaft type: Straight shaft (standard industrial coupling)
- Brake option: Available in some variants (model-dependent)
⚙️ Functional Characteristics
- Designed for high-speed positioning and interpolation control
- Works with Mitsubishi MR-J4 servo amplifiers
- Provides:
- High positioning accuracy
- Smooth low-speed operation
- Fast acceleration/deceleration response
🏭 Typical Applications
The HG-JR73 is commonly used in:
- CNC machining centers (feed axes X/Y/Z)
- Industrial automation machines
- Packaging and assembly systems
- Robotics and positioning tables
- Light-to-medium load ball-screw driven axes
⚠️ Important Note
- ❌ Not a spindle motor (like SJ series)
- ❌ Not a linear motor (like LM series)
- ✅ It is a rotary servo axis motor used for motion control
⚡ Summary
The HG-JR73 is:
- A 0.75 kW Mitsubishi servo motor
- High-speed (up to 6000 rpm)
- Equipped with a high-resolution 22-bit encoder
- Designed for precise CNC axis movement and automation systems