Mitsubishi M80 Built-IN Spindle Motor SJ-PMB02215T-02

🔧 Mitsubishi SJ-PMB02215T-02 – Description

The SJ-PMB02215T-02 is a Mitsubishi Electric SJ-PMB Series built-in spindle motor, used in compact CNC machine tool spindles. It is designed for light-to-medium machining applications, where high speed, compact size, and precise spindle control are more important than very high torque.

⚙️ Key Description

• Series: SJ-PMB Built-in Spindle Motor
• Type: Compact built-in spindle motor
• Construction: Single-coil (no coil changeover in this model)
• Application: Small CNC machining centers, high-speed drilling/milling spindles
• Drive compatibility: MDS-D2-SP-240 spindle drive unit

⚡ Functional Characteristics

• Designed for high-speed spindle operation
• No dual coil system (simpler design vs SJ-B heavy-duty series)
• Optimized for:
  • Light cutting
  • High RPM machining
  • Small tool operations (drilling, engraving, precision milling)

📊 Key Performance Overview

• Power output:
  • Continuous rating: 3.5 kW
  • Short-time rating: 5.5 kW (50% ED)
• Torque:
  • Continuous torque: 22.3 N·m
  • Short-time torque: 35 N·m
• Speed:
  • Base speed: 1500 r/min
  • Maximum speed: 10,000 r/min

🧩 Mechanical & Construction Details

• Rotor inertia: 0.006 kg·m²
• Motor mass: ~4.4 kg (stator), ~3.7 kg (rotor)
• Stator outer diameter: Ø139.5 mm
• Rotor inner diameter: Ø60 mm
• Motor length: ~150 mm

🌡️ Cooling & Operation

• Cooling type: Liquid cooling (stator jacket required)
• Cooling flow: ~5 L/min
• Heat dissipation requirement: ~1400 W
• Insulation class: F-class (155°C)

🏭 Typical Applications

The SJ-PMB02215T-02 is typically used in:

• Small CNC machining centers
• High-speed drilling machines
• PCB / precision milling machines
• Compact automated production equipment

⚠️ Summary

This model is the smallest class in the SJ-PMB series, characterized by:

• Very high speed (up to 10,000 rpm)
• Low torque but high precision
• Compact size and low inertia
• Best suited for light-duty, high-speed machining