Description
SJ-BG180H/150-01☐ (Mitsubishi Electric)
SJ-BG180H/150-01☐ is a Mitsubishi Electric SJ-BG series built-in AC spindle motor, designed for heavy-duty CNC machining centers requiring:
- integrated spindle construction
- very high rigidity and structural strength
- high continuous torque capability
- stable thermal performance under heavy cutting load
- 15,000 rpm class operation
It belongs to the SJ-BG built-in spindle motor family, where the motor is directly embedded into the spindle structure for maximum stiffness and precision.
🔧 Model code breakdown
| Code section | Meaning |
|---|---|
| SJ | Mitsubishi spindle motor family |
| BG | Built-in spindle motor series |
| 180H | 180 mm frame, H-type high-output variant |
| 150 | 15,000 rpm class |
| 01 | winding / standard design version |
| ☐ | OEM / machine-tool builder option |
So:
SJ-BG180H/150-01☐ = high-output 180 mm built-in spindle motor for ~15,000 rpm machining
🔧 Verified specifications (key values)
From Mitsubishi SJ-BG specification tables:
| Parameter | Value |
|---|---|
| Continuous rated output | 15 kW / 26 kW (coil-dependent) |
| Short-time rated output | 26 kW (10% ED) / 37 kW (25% ED) |
| Acceleration/deceleration output | 26 kW / 37 kW |
| Actual accel/decel output | 31.2 kW / 44.4 kW |
| Base speed | 1200 rpm / 4700 rpm (coil dependent) |
| Maximum speed | 6000 rpm / 15000 rpm |
| Continuous torque | 119 N·m / 52.8 N·m |
| Rotor inertia | ~0.029 kg·m² |
| Frame class | 180 mm built-in spindle |
| Cooling | Liquid / oil jacket cooling |
| Heat class | F (155°C) |
⚙️ What makes the “180H” variant special
Within the SJ-BG180 family:
| Variant | Character |
|---|---|
| 180B | balanced general-purpose |
| 180D | high rigidity / heavy cutting |
| 180H | highest-output / highest torque class in 180 frame |
The H-type is designed for:
- maximum cutting torque in the 180 series
- strong roughing capability
- stable performance under continuous heavy load
- dual-coil operation (high/low speed flexibility)
Compared with B and D types:
- ⚡ highest power capability
- 🧱 strongest load handling
- 🔩 best suited for heavy machining cycles
⚙️ What “☐” means
The square symbol indicates:
OEM or machine-tool builder-specific configuration
It may include:
- encoder type
- bearing preload specification
- connector orientation
- balancing grade
- cooling or mounting customization
🏭 Typical applications
SJ-BG180H/150-01☐ is used in:
- heavy-duty CNC machining centers
- steel mold and die machining
- aerospace structural machining
- rough + finish combined machining
- high-load production machining lines
It is selected when machines need:
- ⚖️ maximum torque in BG180 family
- 🧱 extreme spindle rigidity
- 🎯 stable machining under heavy cutting
- ⚡ dual-range speed flexibility (low + high coil operation)
⚖️ Position in Mitsubishi spindle lineup
| Series | Role |
|---|---|
| SJ-V | General-purpose 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-BG180H/150-01☐ is the highest-output 180 mm-class built-in spindle motor, designed for heavy-duty CNC machining centers requiring maximum torque, rigidity, and stable performance up to the 15,000 rpm class.