Description
SJ-DL7.5/150-01T is a Mitsubishi Electric SJ-DL series low-inertia CNC spindle motor, designed for high-speed drilling and tapping machines where very fast acceleration/deceleration and high RPM operation are more important than heavy cutting torque.
It belongs to the SJ-DL (Low-Inertia High-Speed spindle motor family) used mainly in tapping/drilling CNC centers.
🔧 Key specifications (SJ-DL7.5/150-01T)
From Mitsubishi official spindle motor data:
| Parameter | Value |
|---|---|
| Series | SJ-DL (Low inertia spindle) |
| Continuous rated output | 5.5 kW |
| Short-time rated output | 7.5 kW (30 min rating) |
| Standard accel/decel output | 11 kW |
| Actual accel/decel output | 13.2 kW |
| Base speed | 1500 rpm |
| Maximum speed | 15,000 rpm |
| Continuous rated torque | 35.0 N·m |
| Motor inertia | 0.016 kg·m² |
| Frame size | B112 |
| Shaft diameter | Ø48 mm |
| Cooling | Machine-integrated (no fan) |
⚙️ What this motor is used for
This model is designed for:
- CNC tapping machines
- high-speed drilling centers
- light-to-medium machining spindles
- production machines with short cycle times
It is optimized for:
- ⚡ very fast spindle acceleration/deceleration
- 🔁 frequent start/stop cycles
- 🎯 high-speed precision tapping/drilling
🧠 What “150-01T” means
- /150 → medium-high speed spindle class (≈ 15,000 rpm max range)
- 01 → standard design revision
- T → through-spindle / hollow-shaft configuration (coolant/tool-through support)
⚖️ Position in SJ-DL family
| Model | Focus |
|---|---|
| SJ-DL5.5/150 | Balanced high-speed tapping (lighter frame) |
| SJ-DL7.5/150 | Higher torque version for heavier tapping/drilling loads |
| SJ-DL5.5/200 | Higher speed (20,000 rpm class) |
🧠 Simple explanation
SJ-DL7.5/150-01T is a high-speed CNC spindle motor designed for drilling and tapping machines, offering stronger torque than smaller DL models while still reaching about 15,000 rpm with fast response.