Mitsubishi M80 Servo Motor 200V HG903

In Mitsubishi CNC systems (especially MDS-E / MDS-EM / MDS-EJ / SPV3 platforms), HG903 typically refers to:

A very high-power HG-series AC servo motor, usually equivalent to a large-frame HG354-class or custom heavy-duty variant.

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⚙️ Practical interpretation (field service view)

HG903 is generally treated as:

• HG-series feed-axis servo motor (AC brushless)
• High torque / high inertia class
• Likely 3.5 kW class or higher equivalent (system-dependent)
• Used for large CNC machine tool axes

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🏭 Typical applications

• Large machining centers
• Heavy-duty milling / boring machines
• Large X/Y/Z axis feed drives
• High cutting-force industrial CNC systems
• OEM-custom Mitsubishi CNC machine tools

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📊 Why HG903 is not a standard HG code

Mitsubishi official HG naming is structured by power class:

• 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)

👉 “903” does not match this scheme, so it is likely:

• OEM machine tool builder code
• Internal configuration identifier
• Or bundled motor + winding + encoder variant code

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📌 Simple Meaning

HG903 =

OEM/legacy designation for a very high-power Mitsubishi HG-series servo motor, typically equivalent to HG354-class or higher, used in heavy-duty CNC machine tool axes.