Mitsubishi M80 Hollow Shaft Specification Motor 200V SJ-D5.5/120-02T-S

SJ-D5.5/120-02T-S is a Mitsubishi Electric SJ-D series AC spindle motor, and this is a special hollow-shaft spindle variant (the “T-S” type).

It is used in CNC machines where the spindle motor is integrated more directly into the spindle structure.

🔧 Key specifications (SJ-D5.5/120-02T-S)

(Source: Mitsubishi MDS-E / SJ-D spindle motor specification manual)

⚙️ What “T-S” means here

• T → hollow shaft / through-spindle configuration
• S → special spindle integration variant

This means:

• the motor is designed for direct spindle integration
• often used in compact CNC spindle assemblies
• better suited for high-speed machining setups

🧠 What it does

This is a CNC spindle motor, meaning it:

• rotates the cutting tool spindle
• handles machining like milling, drilling, tapping
• operates at high speed (up to 12,000 rpm)
• provides both continuous and short-time high torque

⚙️ Key characteristics

• High-speed spindle design (12,000 rpm max)
• Hollow shaft structure for compact machine integration
• Optimized for stable cutting + high-speed finishing
• Lower continuous power (3.7 kW) but strong peak capability
• Designed for precision CNC machining centers

⚠️ Important notes

• Not a servo motor (no axis positioning role)
• Not a linear motor
• Requires Mitsubishi spindle drive system (MDS series)
• “02T-S” version must match specific CNC drive configuration
• T-S types are not always interchangeable with standard SJ-D 120 frame motors

🧠 Simple explanation

SJ-D5.5/120-02T-S is a compact hollow-shaft CNC spindle motor designed for high-speed machining up to 12,000 rpm with tight integration into the spindle assembly.