Description
SJ-V18.5-04ZT (Mitsubishi Electric)
SJ-V18.5-04ZT is a Mitsubishi Electric SJ-V series AC spindle motor, used in high-power CNC machining centers for heavy cutting and stable torque delivery.
It belongs to the SJ-V (general-purpose, medium-inertia spindle motor family), typically used for larger vertical and horizontal machining centers.
🔧 Key specifications (SJ-V18.5-04ZT)
| Parameter | Value |
|---|---|
| Series | SJ-V |
| Continuous rated output | 11 kW |
| Short-time rated output | 18.5 kW |
| Frame class | Large spindle frame (A160 class) |
| Continuous torque | ~70 N·m class |
| Maximum speed | typically 8,000 rpm class (machine-dependent) |
| Inertia | Medium–high (designed for stable cutting) |
| Cooling | Forced air / machine-integrated |
| Protection | IP44–IP54 (variant dependent) |
(Consistent with SJ-V18.5 class spindle structure used in Mitsubishi spindle lineup.)
⚙️ What “04ZT” means
- 04 → design/power variant within the SJ-V 18.5 kW class
- Z → internal revised/optimized design version
- T → through-spindle (hollow shaft) configuration for coolant/tool-through machining
So:
04ZT = upgraded 18.5 kW SJ-V spindle motor with through-spindle capability and revised internal design
🏭 Typical applications
SJ-V18.5-04ZT is used in:
- CNC vertical machining centers (heavy duty)
- large milling machines
- industrial production machining lines
- continuous heavy cutting operations
It is chosen when machines need:
- high cutting torque at low/medium speed
- strong rigidity under load
- stable continuous industrial operation
⚖️ 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-V18.5-04ZT is a high-power CNC spindle motor designed for heavy machining centers, delivering strong torque and stability for demanding cutting operations rather than high-speed work.