Description
SJ-DJ15/80-01 is a Mitsubishi Electric SJ-DJ series compact & lightweight CNC spindle motor designed for high-torque machining applications while still maintaining lower inertia and faster spindle response than conventional spindle motors.
The SJ-DJ family is Mitsubishi’s compact/lightweight spindle motor series optimized for compact machining centers and rapid acceleration/deceleration.
🔧 Key specifications (SJ-DJ15/80-01)
| Parameter | Value |
|---|---|
| Series | SJ-DJ |
| Type | Compact & lightweight AC spindle motor |
| Continuous rated output | 11 kW |
| Short-time rated output | 15 kW |
| %ED rating | 15% ED |
| Standard accel/decel output | 15 kW |
| Actual accel/decel output | 18 kW |
| Base speed | 1500 rpm (short-time) / 2000 rpm (continuous) |
| Maximum speed | 8000 rpm |
| Frame class | /80 high-torque frame |
| Shaft diameter | Ø48 mm |
| Flange fitting diameter | Ø180 mm |
| Total motor length | 489 mm |
| Approx. mass | 64 kg |
| Protection class | IP54 (shaft excluded) |
| Heat resistance class | Class F (155°C) |
| Compatible spindle drive | MDS-E-SP-200 / MDS-DJ-SP-200 |
These specifications are listed in Mitsubishi’s official spindle motor manuals.
⚙️ What makes the “/80” version different
| Frame type | Main focus |
|---|---|
| /100 | Balanced speed + torque |
| /120 | Higher spindle speed |
| /80 | Higher torque, lower max speed |
The /80 frame is optimized for:
- heavy cutting
- stronger low-speed torque
- rough machining
- large material removal
instead of ultra-high spindle speed finishing.
⚙️ What makes the SJ-DJ series different
Standard SJ-D
- Heavier conventional spindle motor
- Higher structural mass
- General machining applications
SJ-DJ
- Compact and lightweight
- Lower rotor inertia
- Faster spindle acceleration/deceleration
- Reduced machine weight
- Better spindle response
Mitsubishi officially categorizes SJ-DJ as a “Compact & lightweight spindle motor” series.
🧠 Code breakdown
| Code part | Meaning |
|---|---|
| SJ-DJ | Compact/lightweight spindle motor series |
| 15 | Power class |
| /80 | High-torque spindle frame |
| -01 | Mechanical/electrical specification revision |
🏭 Typical applications
Used in:
- medium/heavy machining centers
- rough milling applications
- industrial CNC production machines
- large tool cutting operations
- machines needing strong spindle torque with fast response
⚠️ Important notes
- Not a servo positioning motor
- Not a linear motor
- Requires Mitsubishi spindle drive electronics
- Cooling and bearing maintenance are critical under heavy cutting load
- Must use approved Mitsubishi motor/drive combinations only
🧠 Simple explanation
SJ-DJ15/80-01 is a compact, lightweight 15 kW-class CNC spindle motor optimized for high torque and heavy machining, with faster spindle response than traditional spindle motors.