Description
SJ-BG160D/150-02(R) (Mitsubishi Electric)
SJ-BG160D/150-02(R) is a Mitsubishi Electric SJ-BG series built-in AC spindle motor, engineered for high-precision CNC machining centers that require:
- integrated spindle motor construction
- high rigidity
- stable thermal behavior
- medium/high-speed precision cutting
It belongs to Mitsubishi’s SJ-BG built-in spindle family, where the motor is directly integrated into the spindle housing rather than mounted externally. (mitsubishielectric.com)
🔧 Model code breakdown
| Code section | Meaning |
|---|---|
| SJ | Mitsubishi spindle motor family |
| BG | Built-in spindle motor series |
| 160D | 160 mm frame, D-type high-rigidity variant |
| 150 | 15,000 rpm class |
| 02 | higher output winding/design variant |
| (R) | revised rotor/OEM configuration |
So:
SJ-BG160D/150-02(R) = high-rigidity 160 mm built-in spindle motor for ~15,000 rpm precision machining with higher output configuration
🔧 Verified specifications
From Mitsubishi official SJ-BG spindle motor specification manuals: (mitsubishielectric.com)
| Parameter | Value |
|---|---|
| Series | SJ-BG |
| Motor type | Built-in AC spindle motor |
| Continuous rated output | 5.5 kW |
| Short-time rated output | 11 kW (10% ED) |
| Standard accel/decel output | 11 kW |
| Actual accel/decel output | 13.2 kW |
| Continuous base speed | 3500 rpm |
| Short-time base speed | 3500 rpm |
| Maximum speed | 15,000 rpm |
| Continuous torque | 15.0 N·m |
| Short-time torque | 30.0 N·m |
| Rotor inertia | 0.0048 kg·m² |
| Cooling | Liquid/oil jacket cooling |
| Stator mass | ~7.1 kg |
| Rotor mass | ~2.9 kg |
| Compatible spindle drive | MDS-E-SP-160 / SP2-160160(M) |
⚙️ Difference between “01” and “02” versions
| Variant | General positioning |
|---|---|
| 01 | standard output configuration |
| 02 | higher output / stronger cutting configuration |
Compared with 160D/150-01(R), the 02(R) version provides:
- higher continuous output
- higher short-time torque
- stronger cutting capability
- improved heavy-machining performance
while maintaining:
- same frame size
- same 15,000 rpm class
- same integrated spindle structure
⚙️ What makes the “160D” variant special
The D-type BG motors are optimized for:
- stronger spindle rigidity
- better thermal stability
- stable precision under continuous load
- improved cutting performance
Compared with smaller BG variants, the 160D platform is intended more for:
- sustained machining accuracy
- heavier cutting loads
- stable industrial production use
⚙️ What “(R)” means
The (R) suffix generally indicates:
- revised rotor specification
- balancing revision
- OEM/machine-builder customized version
It is not a separate spindle family.
🏭 Typical applications
SJ-BG160D/150-02(R) is commonly used in:
- high-speed machining centers
- mold & die machining
- aerospace finishing
- precision contour milling
- integrated spindle systems
- continuous industrial machining
It is selected when machines need:
- ⚡ integrated spindle construction
- 🎯 high contour accuracy
- 🧱 stronger cutting rigidity
- 📉 low vibration and thermal growth
⚖️ Position in Mitsubishi spindle lineup
| Series | Role |
|---|---|
| SJ-V | General machining spindle motors |
| SJ-VL | Low-inertia drilling/tapping |
| SJ-DG | High-torque cutting spindle |
| SJ-DL | Ultra high-speed external spindle |
| SJ-BG | Built-in integrated spindle motors |
🧠 Simple explanation
SJ-BG160D/150-02(R) is a higher-output built-in CNC spindle motor designed for precision machining up to about 15,000 rpm, combining integrated spindle construction with stronger cutting capability and high rigidity.