Description
SJ-V3.7/02ZT is a Mitsubishi Electric SJ-V series standard AC spindle motor, used for general CNC machining spindle applications (milling, drilling, light cutting).
It is part of the medium-inertia SJ-V spindle family, not a low-inertia (DL) or high-torque (DG) type.
📊 Verified specifications (SJ-V3.7/02ZT)
| Parameter | Value |
|---|---|
| Series | SJ-V |
| Continuous rated output | 2.2 kW |
| Short-time rated output | 3.7 kW (15 min rating) |
| Acceleration/deceleration output | 3.7 kW |
| Actual accel/decel output | 4.4 kW |
| Base speed | 3000 rpm |
| Maximum speed | 15,000 rpm |
| Frame size | A90 |
| Continuous torque | 7.0 N·m |
| Inertia | 0.00675 kg·m² |
| Degree of protection | IP44 |
| Flange size | 174 mm class |
| Cooling | Natural / fan-assisted depending on machine setup |
(Source: Mitsubishi SJ-V spindle specification tables)
⚙️ What “02ZT” means
- 02 → design power class (3.7 kW short-time rating)
- Z → revised / optimized internal design variant
- T → through-spindle (hollow shaft) type for coolant/tool-through systems
So:
02ZT = upgraded SJ-V 3.7 kW class with through-spindle configuration
🏭 What it is used for
Typical applications:
- CNC milling machines (light–medium duty)
- general machining centers
- drilling/tapping operations
- older or standard spindle CNC machines
⚖️ Where it sits in Mitsubishi spindle families
| Series | Role |
|---|---|
| SJ-V | Standard/general spindle motors |
| SJ-DJ | Compact lightweight spindles |
| SJ-DG | High torque / heavy cutting |
| SJ-DL | Ultra-high-speed tapping/drilling |
🧠 Simple explanation
SJ-V3.7/02ZT is a standard 3.7 kW-class CNC spindle motor designed for general machining, capable of up to ~15,000 rpm with balanced torque and speed performance.