Mitsubishi M80 Spindle Motor 200V SJ-D7.5/120-01

SJ-D7.5/120-01 is a Mitsubishi Electric SJ-D series AC spindle motor used in CNC machine tools to drive the main spindle (tool rotation).

🔧 Key specifications (SJ-D7.5/120-01)

⚙️ What it is used for

This motor drives the CNC spindle, meaning it:

• Rotates cutting tools (milling, drilling, tapping)
• Handles heavier machining loads than 3.7 kW or 5.5 kW versions
• Is suited for machines needing:
  • higher torque at low speeds
  • stronger cutting force stability

🧠 Code breakdown

• SJ-D → spindle motor series
• 7.5 → rated power (7.5 kW)
• /120 → higher-capacity frame variant (stronger torque structure than /100 series)
• -01 → design / construction revision

📐 Typical characteristics

• Larger electromagnetic structure than /100 frame version
• Higher torque output for rough machining
• Stable rotation under heavy cutting loads
• Precision-balanced rotor for vibration reduction
• Used in CNC machining centers and milling machines

⚠️ Important notes

• Not a servo motor (no positioning axis control)
• Not a linear motor (no rail system)
• Requires Mitsubishi spindle drive (MDS series or equivalent)
• Cooling and bearing condition are critical for long life at high load

🧠 Simple explanation

SJ-D7.5/120-01 is a 7.5 kW CNC spindle motor with a stronger “120-frame” design, made for heavier cutting compared to the /100 version.