Description
The Mitsubishi SJ-4-V55-03T is a high-power AC spindle motor (55 kW class) from the Mitsubishi Electric SJ-4-V series, used in large CNC machine tool spindle systems such as heavy-duty machining centers and industrial production machines.
Key Specifications (SJ-4-V55-03T)
| Specification | Value |
|---|---|
| Series | SJ-4-V Series |
| Motor Type | AC Spindle Motor |
| Rated Output | 45 kW (continuous) |
| Short-Time Output | 55 kW (30-minute rating) |
| Acceleration Output | ~66 kW peak (system dependent) |
| Base Speed | 1150 rpm |
| Maximum Speed | 3450 rpm |
| Continuous Torque | ~370 NĀ·m |
| Rated Current | ~150 A |
| Frame Size | B180 |
| Flange Size | 480 SQ |
| Shaft Diameter | 75 mm |
| Motor Mass | ~450 kg |
| Inertia | High-inertia heavy spindle class |
| Protection Class | IP44 |
| Cooling | Self-cooled industrial design |
| Drive Compatibility | Mitsubishi MDS-D / MDS-DH spindle amplifiers |
š Sources: Mitsubishi Electric SJ-4-V series specification manuals (MDS-D/DH2 system data)
Features
- Designed for very heavy CNC spindle applications (not servo axis motor)
- Extremely high power capacity (55 kW short-time rating)
- Very high torque for aggressive cutting and large tool loads
- Stable low-speed machining performance (heavy-duty spindle class)
- Built-in encoder feedback for precise spindle control
- Heavy industrial frame for large machine tools
Typical Applications
- Large CNC machining centers
- Heavy-duty milling and boring machines
- CNC turning centers for large workpieces
- Metal forging and cutting systems
- Industrial-scale manufacturing lines