Description
🔧 Mitsubishi HG703-D48 / HG703S-D48 – Description
The HG703-D48 (HG703S-D48) is a Mitsubishi Electric HG Series high-power AC servo / spindle-class motor, used in CNC machine tool spindle or heavy feed-axis applications depending on configuration.
It belongs to the HG700 class, which is a large-frame, high-torque industrial motor series designed for heavy machining loads and high power output CNC systems.
⚙️ Key Description
- Series: Mitsubishi HG (MELSERVO / CNC spindle & heavy axis family)
- Type: AC brushless rotary motor (used as spindle or high-torque servo)
- Encoder: 20-bit absolute encoder (D48 type, ~1,048,576 pulses/rev)
- Application: CNC spindle systems, heavy feed axes, large machining centers
- Voltage class: 200 VAC industrial CNC drive system
📊 Electrical & Performance Specs
From Mitsubishi HG700-class specifications:
- Rated output: 7.0 kW
- Rated torque: 22.3 N·m
- Rated speed: 3000 rpm
- Maximum torque: ~152 N·m (system peak class)
- Maximum current: ~109 A class
- Motor inertia: ~154 ×10⁻⁴ kg·m²
🧩 Mechanical Features
- Frame size: ~176 mm flange class (large industrial motor)
- Protection: IP67 (shaft excluded)
- Structure: Heavy-duty enclosed motor for CNC environments
- Cooling: Typically machine oil / forced air depending on spindle setup
- Mounting: CNC spindle or heavy ball-screw drive integration
⚙️ Functional Characteristics
The HG703-D48 is not a simple axis servo motor like HG54/HG105. It is designed for:
- High-torque spindle operation (primary use in many machines)
- OR heavy industrial axis drive in large CNC systems
- Strong continuous torque at low RPM
- Stable operation under machining load
🏭 Typical Applications
- CNC machine main spindle systems
- Large machining centers (milling/boring)
- Heavy-duty metal cutting equipment
- High-load rotary axis systems
- Industrial automation requiring very high torque
⚠️ Important Note
- ❌ Not a small feed-axis servo motor (like HG56/HG105)
- ❌ Not a linear motor (LM series is direct-drive linear axis)
- ⚠️ Often used as a spindle motor class, unlike most HG motors you listed earlier
- ✅ It sits at the top power end of HG rotary motor family
⚡ Summary
The HG703-D48 is:
- A 7.0 kW high-power industrial CNC motor
- Part of the HG700 heavy-duty spindle/torque class
- Extremely high torque capability (~22 N·m continuous, much higher peak)
- Designed for main spindle or heavy industrial drive applications