Description
TM-RBP500J20 is a Mitsubishi Electric TM-RB series direct-drive servo motor primary side (stator assembly). It is the highest-torque class in the TM-RB lineup used for large CNC rotary tables and heavy-duty 4th/5th axis systems.
🔧 Key specifications (TM-RBP500J20)
| Parameter | Value |
|---|---|
| Series | TM-RB |
| Type | Primary side (stator) |
| Rated torque | 500 N·m |
| Max torque | ~1250 N·m |
| Rated speed | 200 r/min |
| Max speed | 400 r/min |
| Rated output | ~10 kW class |
| Motor inertia | ~4500 × 10⁻⁴ kg·m² |
| Cooling | Liquid cooling |
| Protection class | IP00 |
| Stator outer diameter | ~Ø400 mm class |
| Stator inner diameter | ~Ø250 mm class |
| Height | ~180 mm |
| Mass (stator) | ~50 kg class |
| Matching rotor | TM-RBS500J20 |
| Drive systems | Mitsubishi MDS-D2 / MDS-DJ high-capacity drives |
⚙️ What it is used for
This motor is designed for:
- Very large CNC rotary tables
- Heavy machining (aerospace, energy, large molds)
- High-load indexing systems
- Ultra-high torque direct-drive applications without gear reduction
⚠️ Important engineering notes
- Requires high-capacity liquid cooling system
- IP00 → must be fully enclosed in machine housing
- Rotor is extremely heavy and strongly magnetized → strict handling procedures required
- Precision air gap control is critical for stable torque and avoiding contact
- Typically used only in large industrial machining centers
🧠 Simple explanation
TM-RBP500J20 is the largest stator in the TM-RB series, designed to generate extremely high torque (500 N·m class) for heavy industrial rotary axes where gears would be impractical.