Description
The Mitsubishi SJ-4-V18.5-14T is a high-capacity 18.5 kW AC spindle motor from Mitsubishi Electric’s SJ-4-V series, used in CNC machine tool spindle applications such as large milling and turning centers.
Key Specifications (SJ-4-V18.5-14T)
| Specification | Value |
|---|---|
| Series | SJ-4-V Series |
| Motor Type | AC Spindle Motor |
| Rated Output | 15 kW (continuous) |
| Short-Time Output | 18.5 kW (30-minute rating) |
| Acceleration Output | 18.5 kW (standard), up to ~22.2 kW peak |
| Rated Torque | 95.5 N·m |
| Base Speed | 1500 rpm |
| Maximum Speed | 6000 rpm |
| Frame Size | A160 |
| Flange Size | 250 SQ |
| Shaft Diameter | 48 mm |
| Mass | ~110 kg |
| Inertia | ~0.0575 kg·m² |
| Protection Class | IP44 |
| Cooling | Self-cooled |
| Compatible Drive | Mitsubishi MDS-D / MDS-DH spindle amplifiers |
📌 Source: Mitsubishi Electric SJ-4-V series specification tables (MDS-D/DH Series Manual)
Features
- Designed for CNC spindle applications (not axis servo use)
- High power output (18.5 kW class) for heavy machining
- Strong torque (~95.5 N·m) for demanding cutting operations
- Stable performance under continuous industrial duty
- Built-in encoder feedback for precise spindle control
- Heavy-duty A160 frame for large machine tools
Typical Applications
- Large CNC machining centers
- Heavy-duty milling machines
- CNC turning and boring machines
- Metal cutting and forming systems
- Industrial automation and production lines