Description
In Mitsubishi CNC environments (MDS-E / MDS-EM / MDS-EJ / SPV3 systems), HG703 is typically interpreted as:
A very high-power HG-series servo motor (OEM-coded), likely corresponding to a large-frame HG354-class or special high-torque variant
⚙️ Practical technical interpretation
Field service usage usually treats HG703 as:
- HG-series AC servo motor (feed-axis type)
- High torque / high inertia class
- Likely 3.5 kW class or higher equivalent
- Used in heavy CNC machine tool axes
🏭 Typical applications
- Large CNC machining centers
- Heavy milling / boring machines
- High-load X/Y/Z feed axes
- Industrial automation with very high inertia
- Older Mitsubishi CNC systems with OEM customization
📊 Why it is not a standard HG code
Mitsubishi HG naming normally follows:
- HG54 = ~0.5 kW
- HG75 = 0.75 kW
- HG104 / HG105 = ~1.0 kW
- HG154 = 1.5 kW
- HG204 / HG224 = 2.0–2.2 kW
- HG354 = 3.5 kW (top standard class)
👉 “703” does not fit this structure, so it is likely:
- OEM internal BOM code
- Machine builder-specific variant
- Or encoded motor + configuration identifier
📌 Simple Meaning
HG703 =
Non-standard OEM designation for a high-power Mitsubishi HG-series servo motor, typically equivalent to HG354-class or higher, used in heavy-duty CNC machine tool axes.

