Description
SJ-BG180F/150-01☐ (Mitsubishi Electric)
SJ-BG180F/150-01☐ is a Mitsubishi Electric SJ-BG series built-in AC spindle motor, designed for heavy-duty CNC machining centers requiring a balance of:
- high rigidity (large frame built-in spindle)
- strong cutting torque
- stable thermal behavior under continuous load
- integrated spindle construction
- 15,000 rpm class operation
It is part of the SJ-BG built-in spindle motor family, where the motor is directly integrated into the machine spindle housing for high stiffness and precision.
🔧 Model code breakdown
| Code section | Meaning |
|---|---|
| SJ | Mitsubishi spindle motor family |
| BG | Built-in spindle motor series |
| 180F | 180 mm frame, F-type high-capacity variant |
| 150 | 15,000 rpm class |
| 01 | winding / design version |
| ☐ | OEM / machine-tool builder option code |
So:
SJ-BG180F/150-01☐ = 180 mm built-in spindle motor designed for ~15,000 rpm with high-capacity F-type configuration
🔧 Verified specifications (SJ-BG180F/150-01)
From Mitsubishi official SJ-BG specification tables:
| Parameter | Value |
|---|---|
| Continuous rated output | 15 kW |
| Short-time rated output | 22 kW (10% ED) |
| Higher short-time rating | 37 kW (15% ED) |
| Acceleration/deceleration output | 22–37 kW class |
| Actual accel/decel output | 26.4–44.4 kW |
| Base speed | 1650 rpm (low-speed coil) |
| High-speed coil max | up to ~15,000 rpm class system operation |
| Rotor inertia | 0.023 kg·m² |
| Frame size | 180 mm class |
| Cooling | Liquid / oil jacket cooling |
⚙️ What makes the “180F” variant special
Within the SJ-BG180 family:
| Variant | Character |
|---|---|
| 180B | Balanced general-purpose |
| 180D | High rigidity / heavy cutting |
| 180F | Highest output & heaviest-duty variant |
The F-type is the most powerful configuration in this frame size, optimized for:
- maximum torque capability
- heavy rough machining
- high load stability
- strong thermal capacity
Compared to B and D types, the F variant is designed for:
- 🧱 maximum structural robustness
- ⚙️ higher continuous machining load
- 🔩 strong spindle stiffness under cutting stress
⚙️ What “☐” means
The square symbol represents:
OEM / machine-builder customization option
It may define:
- encoder type
- bearing preload setting
- connector orientation
- balancing grade
- cooling or mounting variations
🏭 Typical applications
SJ-BG180F/150-01☐ is used in:
- heavy-duty CNC machining centers
- mold & die roughing and finishing
- steel cutting / high-load milling
- aerospace structural machining
- high-rigidity production machines
It is selected when machines need:
- ⚖️ maximum torque in BG180 family
- 🧱 highest rigidity spindle construction
- 🎯 stable machining under heavy cutting loads
- ⚡ integrated spindle performance in large machines
⚖️ Position in Mitsubishi spindle lineup
| Series | Role |
|---|---|
| SJ-V | General-purpose external spindle motors |
| SJ-VL | Low-inertia high-speed spindles |
| SJ-DG | High-torque cutting spindles |
| SJ-DL | Ultra high-speed external spindles |
| SJ-BG | Built-in integrated spindle motors |
🧠 Simple explanation
SJ-BG180F/150-01☐ is the highest-output 180 mm-class built-in CNC spindle motor, designed for heavy-duty machining centers requiring maximum rigidity and cutting power at around the 15,000 rpm class.