Description
🔧 Mitsubishi SJ-PMB14007T-01 – Description
The SJ-PMB14007T-01 is a Mitsubishi Electric SJ-PMB Series built-in spindle motor designed for medium-to-heavy CNC machining applications. It is part of the PMB family optimized for higher torque and lower speed compared to smaller PMB models, making it suitable for more rigid and load-intensive spindle work.
⚙️ Key Description
- Series: SJ-PMB Built-in Spindle Motor
- Type: Dual-coil built-in spindle motor (low-speed / high-speed winding)
- Application: CNC machining centers, medium-heavy milling, industrial spindle systems
- Drive compatibility: MDS-D2-SP-320 spindle drive unit
⚡ Functional Characteristics
- Uses coil changeover design:
- Low-speed coil → high torque cutting
- High-speed coil → higher spindle speed for finishing
- Designed for:
- Stable torque under load
- Medium-heavy machining operations
- Continuous industrial production use
📊 Key Performance Overview
-
Power output:
- Continuous rating: 11 kW
- Short-time rating: 15 kW (15% ED)
-
Torque:
- Continuous: 140 N·m (low-speed coil) / 58.4 N·m (high-speed coil)
- Short-time: 191 N·m / 79.6 N·m
-
Speed range:
- Low-speed coil: 750 r/min base
- High-speed coil: 1800 r/min base
- Maximum speed: 6000 r/min
🧩 Mechanical & Construction Details
- Rotor inertia: ~0.063 kg·m²
- Motor mass: ~30 kg (stator) + ~15 kg (rotor)
- Stator outer diameter: ~Ø254.5 mm
- Rotor inner diameter: ~Ø95 mm
- Motor length: ~250 mm
🌡️ Cooling & Operation
- Cooling type: Liquid/oil cooling (stator jacket required)
- Cooling flow: ~5 L/min
- Heat dissipation requirement: ~1500 W class
🏭 Typical Applications
The SJ-PMB14007T-01 is commonly used in:
- Medium-duty CNC machining centers
- Industrial milling and boring operations
- Machines requiring moderate speed with higher torque stability
- Production environments needing reliable continuous spindle duty
⚠️ Summary
The SJ-PMB14007T-01 sits above smaller PMB models and is characterized by:
- Higher torque capability (up to ~191 N·m short-time)
- Lower maximum speed than compact PMB motors
- Designed for balanced machining: not ultra-high speed, not ultra-heavy torque
- Best suited for general industrial CNC spindle work