Description
SJ-V22-04ZT (Mitsubishi Electric)
SJ-V22-04ZT is a Mitsubishi Electric SJ-V series AC spindle motor, designed for high-power CNC machining centers requiring strong cutting torque, stable heavy-duty operation, and reliable continuous performance.
It belongs to the SJ-V medium-inertia spindle motor family, typically used in industrial vertical and horizontal machining centers.
🔧 Key specifications (from Mitsubishi SJ-V spindle table)
| Parameter | Value |
|---|---|
| Series | SJ-V |
| Continuous rated output | 18.5 kW |
| Short-time rated output | 22 kW (30 min rating) |
| Acceleration/deceleration output | 22 kW |
| Actual accel/decel output | 26.4 kW |
| Base speed | 1500 rpm |
| Maximum speed | 8000 rpm |
| Continuous torque | 118 N·m |
| Inertia | 0.08 kg·m² |
| Frame class | B160 class spindle frame |
| Shaft diameter | Ø55 mm |
| Flange size | 250 mm class |
| Cooling | Forced air / machine-integrated |
| Protection class | IP44 (shaft-through excluded) |
⚙️ What “04ZT” means
- 04 → design / winding / performance variant within the 22 kW SJ-V class
- Z → internal revised / optimized design version
- T → through-spindle (hollow shaft) type for coolant or tool-through machining
So:
04ZT = upgraded SJ-V 22 kW-class spindle motor with through-spindle capability and revised internal design
🏭 Typical applications
SJ-V22-04ZT is used in:
- CNC vertical machining centers (heavy duty)
- large milling machines
- industrial production lines
- heavy cutting operations requiring high spindle torque
It is selected when machines need:
- very strong low/medium-speed cutting force
- stable continuous industrial operation
- high rigidity under load
⚖️ Position in Mitsubishi spindle lineup
| Series | Role |
|---|---|
| SJ-DL | Ultra high-speed drilling/tapping |
| SJ-DJ | Compact/lightweight spindles |
| SJ-V | General-purpose & heavy machining spindles |
| SJ-DG | High dynamic / high-performance cutting spindles |
🧠 Simple explanation
SJ-V22-04ZT is a 22 kW-class CNC spindle motor designed for heavy-duty machining centers, optimized for strong cutting torque and stable operation up to about 8,000 rpm rather than high-speed precision work.