Rexroth MHD090B-035-NG0-UN Synchronous Servo Motor: High-Torque Precision for Demanding Applications
Overview
The Rexroth MHD090B-035-NG0-UN (Order Code: R911277757) is a high-performance synchronous servo motor engineered for torque-intensive industrial automation. Combining advanced liquid cooling technology with robust construction, this motor delivers exceptional thermal management and dynamic response. It is ideal for CNC machining, robotics, and packaging systems requiring sustained high torque and reliability.
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Model | MHD090B-035-NG0-UN | - |
| Rated Power | 3.0 kW (Continuous) | kW |
| Rated Speed | 2,500 rpm | min⁻¹ |
| Continuous Torque | 12.0 Nm (Natural Cooling) | Nm |
| Peak Torque | 49.5 Nm (Max. 3 seconds) | Nm |
| Rated Voltage | 354 V (AC) | V |
| Rated Current | 4.7 A (Continuous) | A |
| Peak Current | 49.5 A | A |
| Torque Constant | 1.22 Nm/A (Crest Values) | Nm/A |
| Winding Resistance | 1.88 Ω (20°C) | Ω |
| Protection Class | IP65 | - |
| Weight | 14.0 kg | kg |
| Cooling Method | Liquid Cooling | - |
| Frame Size | 090 (Flange: 140 mm) | - |
| Operating Temperature | -20°C to +80°C | °C |
Key Features
- Liquid Cooling System: Efficient heat dissipation enables sustained peak torque (49.5 Nm) without thermal degradation.
- High Torque Density: Delivers 12.0 Nm continuous torque in a compact 14 kg frame, outperforming air-cooled competitors.
- Thermal Stability: Maintains performance in ambient temperatures up to 80°C.
- Precision Feedback: Relative encoder with digital servo feedback (HSF) ensures nanoscale positioning accuracy.
- Cabling Flexibility: 270° turnable power/feedback connectors simplify installation in tight spaces.
- Maintenance-Free Design: Brushless construction and lifetime-lubricated bearings reduce downtime.
Competitive Comparison
| Feature | MHD090B-035-NG0-UN | Siemens 1FK7-340 | Panasonic A5-2000W |
|---|---|---|---|
| Cooling Method | Liquid | Air | Air |
| Continuous Torque | 12.0 Nm | 10.5 Nm | 9.0 Nm |
| Peak Torque | 49.5 Nm | 45.0 Nm | 40.0 Nm |
| Power Density | 2.14 kW/kg | 1.89 kW/kg | 1.67 kW/kg |
| Overload Capacity | 413% (3s) | 350% (3s) | 300% (3s) |
| Protection Class | IP65 | IP54 | IP65 |
| Encoder Resolution | 20-bit Relative | 18-bit Incremental | 16-bit Incremental |
Why Choose MHD090B-035-NG0-UN?
- Superior Cooling: Liquid cooling sustains 20% higher torque than Siemens 1FK7 in high-duty cycles.
- Thermal Resilience: Operates reliably at 80°C, unlike Panasonic A5’s 60°C limit.
- Dynamic Performance: 413% overload capacity supports demanding acceleration profiles.
- Energy Efficiency: 94% efficiency rating reduces operational costs.
Application Areas
- CNC Machining: Spindle drives for heavy-duty milling and turning.
- Robotics: Joint actuators in high-payload industrial robots.
- Packaging: Continuous motion systems with frequent start-stop cycles.
- Material Handling: Conveyor systems requiring precise tension control.
- Printing: High-speed web presses and label dispensing.
Selection Guide for Buyers
1. Torque & Cooling Requirements
- High-Torque/High-Duty Applications: Select MHD090B-035-NG0-UN for continuous loads exceeding 10 Nm (e.g., robotic arms).
- Thermal Management: Liquid cooling ensures stable performance in enclosed cabinets.
2. Environmental Adaptability
- Wet/Dusty Environments: IP65 rating makes it ideal for packaging or food processing.
- Temperature Extremes: Derate torque by 10% if ambient temperatures exceed 40°C.
3. Integration Compatibility
- Drive Matching: Pair with Rexroth IndraDrive controllers for synchronized multi-axis control.
- Mounting Flexibility: 140 mm flange and plain shaft simplify retrofitting.
4. Cost-Benefit Analysis
- Maintenance Savings: Brushless design eliminates replacement costs.
- Energy Savings: 6% higher efficiency than Siemens 1FK7 reduces long-term expenses.
Inventory & Delivery
- Stock Availability: R911277757 is currently in stock and ready for immediate dispatch.
- Global Shipping: Delivered via DHL/Fedex with 3–5 business day transit times.
- Warranty: 3-year manufacturer warranty for peace of mind.
Conclusion
The Rexroth MHD090B-035-NG0-UN sets a new benchmark for servo motor performance, offering unmatched torque density, thermal stability, and energy efficiency. Its liquid cooling system and IP65 protection make it a superior choice for industries demanding precision and reliability.
